Re: Hello From Nigeria

[Eugène Ngontang]

Hello,

My name is Eugene. I'm from Cameroon, being an SRE-SE Engineer and Linux
expert as you can see here in my LinkedIn profile
https://www.linkedin.com/in/nixmind/.

I've founded leading a social movement I created since 2016, called Les
Castors Du Numérique (I speak french and english, but live in France
actually, and we are english and french guys in the association, from
multiple countries).
Here is the little site I built to juste let people know the vision
(actually in french, but will totally rebuilt in english and french) :
*https://www.lescdn.com/
*

The aim is to provide Africa folks with a pure playground to play and
practice tech, convivially.
We are just starting concrete things/activities, cause I think big and want
pragmatism in our actions, and we are building a collaborative expertise
platform for the association.
So if you guys are one involved in tech, wishing to acquire and/or share
experience, expertise.. you can join us, without any protocol

Our actual main project is to build a collaborative expertise platform as
stated above, but before get there, I've created  an interactive slack
workspace, where we can talk, have fun and emulate each other, and guys
like would pretty stimulate the movement, and why not work together to
build this platform???

Here is the workspace url : *https://lescastorsdunumrique.slack.com
*, but I need to send you
invitation in your mailboxes...

Thus dear geeks brothers/friends, do you allow me to invite you there, so
that we can create a "*django-users"* chanel for django specific purposes,
while you could still explore other channels to acquire/share more
knowledge?
If yes, please reply to me with your email addresses ...

Let me know if you have any question, I'll be pleased to answer and having
you join us for a pragmatic action and vision, with highest value.

Thank you for your attention.

Kind regards,
Eugène NG

Le mar. 12 mars 2019 à 19:27, Joshua Kayode  a
écrit :

> You are all welcome
>
> On Tue, Mar 12, 2019, 12:17 Emmanuel klutse 
>> I’m from Ghana and will also love to join.
>>
>> On Tue, 12 Mar 2019 at 11:14 AM, Emmanuel Agu 
>> wrote:
>>
>>> Nice one, am in.
>>>
>>> On Monday, 11 March 2019 14:16:28 UTC+1, Joshua Kayode wrote:

 Greetings, if you are a django developer in Nigeria, would you consider
 joining a WhatsApp group?

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-- 
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engont...@lescdn.com

*Aux hommes il faut un chef, et au*

* chef il faut des hommes!L'habit ne fait pas le moine, mais lorsqu'on te
voit on te juge!*

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Re: Use Django to implement my GUI!

[Eugène Ngontang]

Ok!

I think several times and solved the problem.

In fact I think the admin was waiting an address to build the http response
it self, not really a http response.

I remove the HttpResponse or HttpResponseRedirect method  from the return
statement, and it worked as I expected.

The wrong code line :
   *#return HttpResponseRedirect('10.136.37.19:8080%s/'
% reverse 'app.views.job_exec_user_error', args=(self.jobhistory_id,)))   *

The correct code line :
   #return (reverse('app.views.job_exec_user_error',
args=(self.jobhistory_id,)))

Now I'm dealing whith asyncronous communications.



2012/7/16 Eugène Ngontang <sympav...@gmail.com>

> Hi!
>
> To complete my HttpResponseRedirect issue, here is a screenshot i have
> when clinking on the link.
>
> The browser does not know the page content type, and I don't see the to
> set the content type with HttpResponseRedirect method, cause it takes only
> one argument, which is the address to redirect to.
>
> Thank for advance for your answer.
>
> 2012/7/15 Eugène Ngontang <sympav...@gmail.com>
>
>> Hi all!
>>
>> Hope you still remember this post which helps dive into django. I have
>> gone really ahead with my developments, and now i'm willing to make some
>> optimization and have some few issues. I don't know if I should open a new
>> thread for each one. You will tell me, but I prefered to do it here because
>> the initial thread was this one.
>>
>> - First I can't use the HttpResponseRedirect() method in my application,
>> it does not work like it should. In fact in my models module, I have a
>> JobHistory class and a member function in that class which returns a link
>> for the listdisplay of that model in the admin module.
>> But when the id i'm looking for in the database does not exist, i would
>> like to redirect the user to a custum error page. And to that I used
>> HttpResponseRedirect() wich is unable to return the right address to the
>> browser. I tried such things, read the documentation several times but
>> nothing. I thought it was the reverse function which does not locate the
>> page but no, because even with google address the browser receive a
>> response address with some headers concatanated, and the browser cannot
>> access the page, cause it has an invalid address:
>> the code line in the models module:
>> def get_executing_user_url(self):
>> user_list = SystemUser.objects.filter(systemuser_name =
>> self.job_executing_user, host = self.job.host)
>> if not user_list:
>>  return HttpResponseRedirect('
>> http://www.google.com/')
>>
>> #return HttpResponseRedirect('10.136.37.19:8080%s/'
>> % reverse('fancycron.views.job_exec_user_error',
>> args=(self.jobhistory_id,)))
>> else:
>> return '../systemuser/%s/' %
>> (user_list[0].systemuser_id)
>>
>> You can see I've even tried to hardput the server address, but it did not
>> work, and I even tested with google and it didn't work too. Tell me if I
>> missed something in the use of HttpResponseRedirect. The error is not a
>> django error, but the returned address is just not accessible each any time
>> i try.
>>
>> - The second issue is that I have implement my middleware (django) and
>> remote backend communication using django signals. It works, but as you can
>> expected, it's synchronous, and I would like now to do it asynchronously.
>> Is Celery the best option? If yes, could you please indicate me the
>> simplest and efficient way to set that up? Anyway, ho can I send messages
>> to my remote backend, without block in my browser rendering?
>>
>> Some good and working tutorials are welcome.
>>
>> Thank you a lot guys.
>> Eugène NG
>>
>>
>> 2012/5/20 Eugène Ngontang <sympav...@gmail.com>
>>
>>> Yes you're right Marc!
>>>
>>> It's just that I wanted to mention the fact my application is not only a
>>> web site accessible via a web browser only, but a client-server application
>>> with web-based GUI.
>>>
>>> But now things are clear, we're all now ok with the problematic and with
>>> your help and great responses, i noticed it's better to do all my system
>>> communication based on HTTP.
>>>
>>> I thank you for all your attention, all new ideas are still well come,
>>> and i'll let you follow up the evelution of the development.
>>>
>>> Thanks guys.
>>>
>>>
>>>
>>>
>>> 2

Re: Use Django to implement my GUI!

[Eugène Ngontang]

Hi all!

Hope you still remember this post which helps dive into django. I have gone
really ahead with my developments, and now i'm willing to make some
optimization and have some few issues. I don't know if I should open a new
thread for each one. You will tell me, but I prefered to do it here because
the initial thread was this one.

- First I can't use the HttpResponseRedirect() method in my application, it
does not work like it should. In fact in my models module, I have a
JobHistory class and a member function in that class which returns a link
for the listdisplay of that model in the admin module.
But when the id i'm looking for in the database does not exist, i would
like to redirect the user to a custum error page. And to that I used
HttpResponseRedirect() wich is unable to return the right address to the
browser. I tried such things, read the documentation several times but
nothing. I thought it was the reverse function which does not locate the
page but no, because even with google address the browser receive a
response address with some headers concatanated, and the browser cannot
access the page, cause it has an invalid address:
the code line in the models module:
def get_executing_user_url(self):
user_list = SystemUser.objects.filter(systemuser_name =
self.job_executing_user, host = self.job.host)
if not user_list:
return HttpResponse('http://www.google.com/')
#return HttpResponseRedirect('10.136.37.19:8080%s/'
% reverse('fancycron.views.job_exec_user_error',
args=(self.jobhistory_id,)))
else:
return '../systemuser/%s/' %
(user_list[0].systemuser_id)

You can see I've even tried to hardput the server address, but it did not
work, and I even tested with google and it didn't work too. Tell me if I
missed something in the use of HttpResponseRedirect. The error is not a
django error, but the returned address is just not accessible each any time
i try.

- The second issue is that I have implement my middleware (django) and
remote backend communication using django signals. It works, but as you can
expected, it's synchronous, and I would like now to do it asynchronously.
Is Celery the best option? If yes, could you please indicate me the
simplest and efficient way to set that up? Anyway, ho can I send messages
to my remote backend, without block in my browser rendering?

Some good and working tutorials are welcome.

Thank you a lot guys.
Eugène NG

2012/5/20 Eugène Ngontang <sympav...@gmail.com>

> Yes you're right Marc!
>
> It's just that I wanted to mention the fact my application is not only a
> web site accessible via a web browser only, but a client-server application
> with web-based GUI.
>
> But now things are clear, we're all now ok with the problematic and with
> your help and great responses, i noticed it's better to do all my system
> communication based on HTTP.
>
> I thank you for all your attention, all new ideas are still well come, and
> i'll let you follow up the evelution of the development.
>
> Thanks guys.
>
>
>
>
> 2012/5/20 Marc Aymerich <glicer...@gmail.com>
>
>> On Sat, May 19, 2012 at 8:01 PM, Eugène Ngontang <sympav...@gmail.com>
>> wrote:
>> > Hi Jani.
>> > I don't know why you say
>> >
>> > " 3) Are you now trying to figure out how to plug in Django in "Adming
>> > module/PC with GUI block"?"
>> >
>> > My admin module and the gui do not share anything. They are not on the
>> same
>> > pc.
>> > Gui is for displaying and admin for the page content management like
>> any web
>> > aplication works.
>> >
>> > I please us unot to build a myster arround this thread. The problem was
>> > simple:
>>
>>
>> HI Eugène,
>> the problem was simple, but all we have misunderstood you because
>> usually the term GUI is used to refer "desktop application" rather
>> than a web page, which seems to be the case.
>>
>> br
>> --
>> Marc
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Django users" group.
>> To post to this group, send email to django-users@googlegroups.com.
>> To unsubscribe from this group, send email to
>> django-users+unsubscr...@googlegroups.com.
>> For more options, visit this group at
>> http://groups.google.com/group/django-users?hl=en.
>>
>>
>
>
> --
> ngont...@epitech.net
> sympav...@gmail.com
> 
> *Aux hommes il faut un chef, et au** chef il faut des hommes!*
>
>


-- 
ngont...@epitech.net
sympav...@gmail.com

Re: Django Models Foreign Key Issue!

[Eugène Ngontang]

Hi all!

The issue was not from Django side, but really from my models
implementation.

I made mistake when propagating my associative tables through other tables.
And there was another unity constraint blocking the one i wanted to set.

I don't think it's necessary to explain you all here, because it's purely
model issue, not django models issue.

But I fixed the problem.

Thanks anyway for eading.

2012/5/28 Eugene NGONTANG 

> I encountered a problem using Django foreign key unique_together for
> one of my models.
>
> I have three models (representing three tables in the database), host,
> user, and job.
>
> - user has a host foreign key
> - job has a user foreign key and a host foreign key : Because we can
> have the same user on two different host, and the same job for the
> users. But we can't (should not) have the same job name duplicate for
> the same user and host id.
>
> I use this in my class model :
>
> class Meta:
> unique_together = ("job_name", "user", "host")
>
> It works for "./manage.py sqall my_app", and "./manage.py syncdb"
>
> Things go fine untill i try to create a job with the same name in  the
> admin interface for two different users on the same host.
>
> The django admin accept the request, but it blocks at the sql level,
> and returns this execption in the error page:
>
>  Exception Value: (1062, "Duplicate entry 'my_command-5' for key
> 'job_name'")
>
> I can't use this :
> class Meta:
> unique_together = (("job_name", "user"), ("user",
> "host")).
>
> It will be take as to two unique_together case.
>
> That's what the "./manage.py sqall my_app" has generated in the
> standard output:
> ..
>   UNIQUE (`job_name`, `user_id`, `host_id`)
> .
>
> But how to tell django to tell the sgbd that unicité is to be applied
> on the job_name, the user_id and the host_id?
>
>
> Has anyone encontered this issue?
>
> Thanks for looking.
>
> --
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>


-- 
ngont...@epitech.net
sympav...@gmail.com

*Aux hommes il faut un chef, et au** chef il faut des hommes!
L'habit ne fait pas le moine, mais lorsqu'on te voit on te juge!
*

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Re: Use Django to implement my GUI!

[Eugène Ngontang]

Yes you're right Marc!

It's just that I wanted to mention the fact my application is not only a
web site accessible via a web browser only, but a client-server application
with web-based GUI.

But now things are clear, we're all now ok with the problematic and with
your help and great responses, i noticed it's better to do all my system
communication based on HTTP.

I thank you for all your attention, all new ideas are still well come, and
i'll let you follow up the evelution of the development.

Thanks guys.



2012/5/20 Marc Aymerich <glicer...@gmail.com>

> On Sat, May 19, 2012 at 8:01 PM, Eugène Ngontang <sympav...@gmail.com>
> wrote:
> > Hi Jani.
> > I don't know why you say
> >
> > " 3) Are you now trying to figure out how to plug in Django in "Adming
> > module/PC with GUI block"?"
> >
> > My admin module and the gui do not share anything. They are not on the
> same
> > pc.
> > Gui is for displaying and admin for the page content management like any
> web
> > aplication works.
> >
> > I please us unot to build a myster arround this thread. The problem was
> > simple:
>
>
> HI Eugène,
> the problem was simple, but all we have misunderstood you because
> usually the term GUI is used to refer "desktop application" rather
> than a web page, which seems to be the case.
>
> br
> --
> Marc
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>


-- 
ngont...@epitech.net
sympav...@gmail.com

*Aux hommes il faut un chef, et au** chef il faut des hommes!*

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Re: Use Django to implement my GUI!

[Eugène Ngontang]

Hi Jani.
I don't know why you say
" 3) Are you now trying to figure out how to plug in Django in "Adming
module/PC with GUI block"?"

My admin module and the gui do not share anything. They are not on the same
pc.
Gui is for displaying and admin for the page content management as any
Le 19 mai 2012 11:38, "Eugène Ngontang" <sympav...@gmail.com> a écrit :

> When you're asking if my client/server already exist. You're talking about
> physical machines or applications/modules?
>
> - the machines where client module will run already exist and are used
> dayly. The client module will just be installed there and do what it has to
> do.
> - every body knows the browser/gui can be found and run anywhere.
> - Now the server machine where the web server should be running and the
> admin module will be deployed is a dedicated machine that should be set up
> specially for the project.
> - the database could be on a separated machine or anywhere, it doesn't
> matter.
>
> I don't know why you still don't understand Jani. The physical
> architecture is simple and i described it.
>
> And i was saying all will now be done in http. I just have to make my
> admin(browser) notified asynchronously, as well as my clients (i know i
> should avoid distinguish them from the gui/browser but it's for make things
> clear)
>
> See you.
> Le 19 mai 2012 08:09, "Jani Tiainen" <rede...@gmail.com> a écrit :
>
>> Hi,
>>
>> By looking your diagram it's still the same as you described in your
>> earlier mails. So it doesn't help at all. :)
>>
>> 1) Is your server something that exists and is used in everyday life or
>> is it something that you're going to build?
>>
>> 2) Are your clients something that already exists and is used in everyday
>> life?
>>
>> 3) Are you now trying to figure out how to plug in Django in "Adming
>> module/PC with GUI block"?
>>
>>
>> On Fri, May 18, 2012 at 6:36 AM, Eugène Ngontang <sympav...@gmail.com>wrote:
>>
>>> Hi Guys!
>>>
>>> I've been busy a bit, I'm back to thread with the high level
>>> architecture. Attached here is a diagram, just to understand what i meant.
>>>
>>> Don't pay attention for object I use to describe modules or architecture
>>> components.
>>>
>>> Now you will be able to understand what I mean by the server module, the
>>> admin module, and the client module of my architecture.
>>>
>>> As you could see on the diagram, the admin module is installd on the
>>> server(where the server module is installed) and is destined to provide
>>> views to the GUI.
>>> The clients receive and send data to the server.
>>> When the admin make some actions, some clients are notifed, and when
>>> client send informations admin (GUi is notified).
>>>
>>> Now two things come in my mind when I was thinking :
>>>
>>> - First I could stay in the way I want the server to use HTTP for the
>>> admin side, and another protocol to communicate with client. In that way
>>> the Admin Module (Django) will alter and read data from data base. and the
>>> server module will alter and read data from database. Then each information
>>> retrievement will lead in reading database since informations could have
>>> been changed. You can that's really heavy.
>>>
>>> - Second do all things in http. Mean that my server is just a web
>>> application undertanding HTTP (I will the use django for that). The server
>>> will serve request depending on the type of request, and each client will
>>> communicate with the server using HTTP.  Then server will define pages/urls
>>> for admin (to be sent to the GUI), and pages/urls  for clients.
>>> By this way, the only relation between my modules will be the protocol
>>> (HTTP for the instance) and they could be implemented in what ever language
>>> we like. The sever will run asynchronously for admin and clients.
>>>   The admin will then be just an interface to wich convert data to the
>>> right display format for the GUI. And the GUI could be any type, and for
>>> the web interface type I will use DJANGO for my Admin module.
>>>I will then also have to develop a http client for my client module.
>>>
>>> Actuallu I'm going to take the second choice, since it lets all the
>>> charge for read and write database to the server, which could run and
>>> publish informations asynchronously(websocket could help here).
>>>
>>> I precise that I'm not a web a

Re: Use Django to implement my GUI!

[Eugène Ngontang]

Hi Jani.
I don't know why you say
" 3) Are you now trying to figure out how to plug in Django in "Adming
module/PC with GUI block"?"

My admin module and the gui do not share anything. They are not on the same
pc.
Gui is for displaying and admin for the page content management like any
web aplication works.

I please us unot to build a myster arround this thread. The problem was
simple:
I wanted my server to asynchronously manage web pages for views, and remote
dustributed clients (like in the diagram) using tcp/udp sockets.
Now all communications will be done in http and any client will use this
protocol (web browser or my app client module).
The server (a http server) will then just use an admin module based on
django.

That's the way were going to do. Now, if you have advises concerning this
impletation give them to please.
Thanks.
Le 19 mai 2012 11:38, "Eugène Ngontang" <sympav...@gmail.com> a écrit :

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Re: Use Django to implement my GUI!

[Eugène Ngontang]

When you're asking if my client/server already exist. You're talking about
physical machines or applications/modules?

- the machines where client module will run already exist and are used
dayly. The client module will just be installed there and do what it has to
do.
- every body knows the browser/gui can be found and run anywhere.
- Now the server machine where the web server should be running and the
admin module will be deployed is a dedicated machine that should be set up
specially for the project.
- the database could be on a separated machine or anywhere, it doesn't
matter.

I don't know why you still don't understand Jani. The physical architecture
is simple and i described it.

And i was saying all will now be done in http. I just have to make my
admin(browser) notified asynchronously, as well as my clients (i know i
should avoid distinguish them from the gui/browser but it's for make things
clear)

See you.
Le 19 mai 2012 08:09, "Jani Tiainen" <rede...@gmail.com> a écrit :

> Hi,
>
> By looking your diagram it's still the same as you described in your
> earlier mails. So it doesn't help at all. :)
>
> 1) Is your server something that exists and is used in everyday life or is
> it something that you're going to build?
>
> 2) Are your clients something that already exists and is used in everyday
> life?
>
> 3) Are you now trying to figure out how to plug in Django in "Adming
> module/PC with GUI block"?
>
>
> On Fri, May 18, 2012 at 6:36 AM, Eugène Ngontang <sympav...@gmail.com>wrote:
>
>> Hi Guys!
>>
>> I've been busy a bit, I'm back to thread with the high level
>> architecture. Attached here is a diagram, just to understand what i meant.
>>
>> Don't pay attention for object I use to describe modules or architecture
>> components.
>>
>> Now you will be able to understand what I mean by the server module, the
>> admin module, and the client module of my architecture.
>>
>> As you could see on the diagram, the admin module is installd on the
>> server(where the server module is installed) and is destined to provide
>> views to the GUI.
>> The clients receive and send data to the server.
>> When the admin make some actions, some clients are notifed, and when
>> client send informations admin (GUi is notified).
>>
>> Now two things come in my mind when I was thinking :
>>
>> - First I could stay in the way I want the server to use HTTP for the
>> admin side, and another protocol to communicate with client. In that way
>> the Admin Module (Django) will alter and read data from data base. and the
>> server module will alter and read data from database. Then each information
>> retrievement will lead in reading database since informations could have
>> been changed. You can that's really heavy.
>>
>> - Second do all things in http. Mean that my server is just a web
>> application undertanding HTTP (I will the use django for that). The server
>> will serve request depending on the type of request, and each client will
>> communicate with the server using HTTP.  Then server will define pages/urls
>> for admin (to be sent to the GUI), and pages/urls  for clients.
>> By this way, the only relation between my modules will be the protocol
>> (HTTP for the instance) and they could be implemented in what ever language
>> we like. The sever will run asynchronously for admin and clients.
>>   The admin will then be just an interface to wich convert data to the
>> right display format for the GUI. And the GUI could be any type, and for
>> the web interface type I will use DJANGO for my Admin module.
>>I will then also have to develop a http client for my client module.
>>
>> Actuallu I'm going to take the second choice, since it lets all the
>> charge for read and write database to the server, which could run and
>> publish informations asynchronously(websocket could help here).
>>
>> I precise that I'm not a web architect or designer, but i understand
>> software architecture. I'm really a system and network engineer, with good
>> developpement skill but not to much in web.
>>
>> Look now my architecture diagram and tell me if what I'm describing in
>> the second item fit. And give idea if you have, about libraiies and or
>> framwork that could help going fast and easy.
>> I thing I will use django and green unicorn.
>>
>> Thanks for your attention.
>>
>>
>>
>> 2012/5/16 Alec Taylor <alec.tayl...@gmail.com>
>>
>>> Oh right, it's just Pyjamas.
>>>
>>> Still, annoyed I didn't think to recommend it first!
>>>
>>>
>>>

Re: GUI for network interface

[Eugène Ngontang]

Hi!
Design your model with host entities. From What you wrote i can see only
one entity right now : "host"
But you can create other entities and define relationship between them
(your entities).
And give attributes to your entities. Attributes will depend on what
information you want to store in an entity, for exemple a host.
After your model is described, use the django admin tutorial to implement
your interface.
It will be sufficient for your case.
Le 16 mai 2012 17:00, "Ali Shaikh"  a écrit :

> hi Django...!!
>
> I want to implement GUI for ma projectusing Django.
>
> Like in network different host are connected ,for that need to proved
> components like connect,disconnect ,status n all related staff
>
> Please help me to develop this GUI using Django..
>
>
> Thank You
>
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Re: Use Django to implement my GUI!

[Eugène Ngontang]

Ok!
But it's not so complited to understand.
I will even send a diagram.
Le 16 mai 2012 13:50, "Marcin Tustin" <marcin.tus...@gmail.com> a écrit :

> A lot of people seem confused by your architecture. It might help if you
> provided a complete (but high-level) description of the architecture of the
> system in a single email.
>
> On Wed, May 16, 2012 at 12:47 PM, Eugène Ngontang <sympav...@gmail.com>wrote:
>
>> No i'm not inventing a server.
>> The application has a centrilzed server (module server installed on a
>> dedicated host
>> ).
>> The dispatches tasks to remote clients (the client module is installed on
>> each client host) and receives informations from clients about taks state.
>>
>> How would you like me to describe or call my app  components?
>> What is not clear for you in my architecture description?
>> How would you call my server module?
>> And i'm not saying the database is installed on the same machine as the
>> server, even if it could be.
>> But only the server can access database directly.
>>
>> If you like so, What i call server could stand for a central task
>> supervisor.
>>
>> Thanks for attention Jani.
>> Le 16 mai 2012 12:01, "Jani Tiainen" <rede...@gmail.com> a écrit :
>>
>> Hi,
>>>
>>> Like I said, it all depends what you have and what is the goal.
>>>
>>> You keep constantly talking about magical "server" that talks with the
>>> database. Is this server already existing piece of infrastructure that some
>>> programs already use and you like to hook up with that?
>>>
>>> Or is this server something that you just invented in lack of better
>>> knowledge?
>>>
>>> You talk about state changes (in example you give a task). Must those
>>> changes be reflected in "real time" between arbitrary clients? Or is it
>>> sufficient that client sees changes at some later point?
>>>
>>>
>>>
>>> 16.5.2012 3:30, Eugène Ngontang kirjoitti:
>>>
>>>> Hi Jani!
>>>>
>>>> Now you can understand what i meant, but I'm not just try to mec things
>>>> complicated.
>>>>
>>>> I'm not talking here about my technical implementation, but i'm
>>>> describing the needs/contraints, and my app architecture to you.
>>>>
>>>> -  The remote clients are at the heart of the software system, since
>>>> data stored in the database are destined to them (the server push each
>>>> information to the corresponding host)
>>>> - When a client starts, it trys to establish a connection with the
>>>> server, and if succeed, it retrieves its informations from the server.
>>>> The server then send back informations conerning the host executing the
>>>> client (the way server retrieves informations from the data base manager
>>>> doesn't matter here, it's a technical purpose)
>>>> - When a task state changes, it has to notify the server by sending a
>>>> packet through the network. The GUI (web browser) has then to display
>>>> the new state.
>>>> - When a user of the software wants to create a new task on a host, it
>>>> uses the GUI for the purpose, and the information has to be sent to the
>>>> remote corresponding client/host for processing.
>>>>
>>>> Tell in my place, what logic would you adopt. I would like idea from you
>>>> guys in this case, before go on a first definitive choice.
>>>>
>>>> I can see web sockets solves so much problems for developpers, and i'm
>>>> still looking if it could help achieve correctly what I want to. The
>>>> problem of IE < 10 for the instance is not so important.
>>>>
>>>> Now also, can you try to advise me the best way for serving file using
>>>> python-Django (apache, unicorn, ..)?
>>>>
>>>> Thanks again.
>>>>
>>>> 2012/5/15 Jani Tiainen <rede...@gmail.com <mailto:rede...@gmail.com>>
>>>>
>>>>Hi,
>>>>
>>>>Now it starts to make "sense".
>>>>
>>>>I just wonder why are you trying to build something so extremely
>>>>complicated?
>>>>
>>>>What is the rationale behind to have additional middleware layer
>>>>between web ui and the server backend?
>>>>
>>>>Wouldn't it be sufficient to have architecture like:
&

Re: Use Django to implement my GUI!

[Eugène Ngontang]

No i'm not inventing a server.
The application has a centrilzed server (module server installed on a
dedicated host
).
The dispatches tasks to remote clients (the client module is installed on
each client host) and receives informations from clients about taks state.

How would you like me to describe or call my app  components?
What is not clear for you in my architecture description?
How would you call my server module?
And i'm not saying the database is installed on the same machine as the
server, even if it could be.
But only the server can access database directly.

If you like so, What i call server could stand for a central task
supervisor.

Thanks for attention Jani.
Le 16 mai 2012 12:01, "Jani Tiainen" <rede...@gmail.com> a écrit :

> Hi,
>
> Like I said, it all depends what you have and what is the goal.
>
> You keep constantly talking about magical "server" that talks with the
> database. Is this server already existing piece of infrastructure that some
> programs already use and you like to hook up with that?
>
> Or is this server something that you just invented in lack of better
> knowledge?
>
> You talk about state changes (in example you give a task). Must those
> changes be reflected in "real time" between arbitrary clients? Or is it
> sufficient that client sees changes at some later point?
>
>
>
> 16.5.2012 3:30, Eugène Ngontang kirjoitti:
>
>> Hi Jani!
>>
>> Now you can understand what i meant, but I'm not just try to mec things
>> complicated.
>>
>> I'm not talking here about my technical implementation, but i'm
>> describing the needs/contraints, and my app architecture to you.
>>
>> -  The remote clients are at the heart of the software system, since
>> data stored in the database are destined to them (the server push each
>> information to the corresponding host)
>> - When a client starts, it trys to establish a connection with the
>> server, and if succeed, it retrieves its informations from the server.
>> The server then send back informations conerning the host executing the
>> client (the way server retrieves informations from the data base manager
>> doesn't matter here, it's a technical purpose)
>> - When a task state changes, it has to notify the server by sending a
>> packet through the network. The GUI (web browser) has then to display
>> the new state.
>> - When a user of the software wants to create a new task on a host, it
>> uses the GUI for the purpose, and the information has to be sent to the
>> remote corresponding client/host for processing.
>>
>> Tell in my place, what logic would you adopt. I would like idea from you
>> guys in this case, before go on a first definitive choice.
>>
>> I can see web sockets solves so much problems for developpers, and i'm
>> still looking if it could help achieve correctly what I want to. The
>> problem of IE < 10 for the instance is not so important.
>>
>> Now also, can you try to advise me the best way for serving file using
>> python-Django (apache, unicorn, ..)?
>>
>> Thanks again.
>>
>> 2012/5/15 Jani Tiainen <rede...@gmail.com <mailto:rede...@gmail.com>>
>>
>>Hi,
>>
>>Now it starts to make "sense".
>>
>>I just wonder why are you trying to build something so extremely
>>complicated?
>>
>>What is the rationale behind to have additional middleware layer
>>between web ui and the server backend?
>>
>>Wouldn't it be sufficient to have architecture like:
>>
>>Browser <-> django middleware <-> remote backend
>>
>>Communication between django middle ware and remote backend should
>>be built on top of some messaging system, like celery + rabbitmq
>>which gives you quite standard asyncronous communication between
>>django middleware and remote backend. Of course you might need to
>>write some adapters on remote side but that's part of the job.
>>
>>Only real problem is that if you need to push changes to browser
>>side. There doesn't exists any really good ways to do that. HTML5
>>was supposed to bring websockets to overcome the problem. One big
>>problem is that only from IE series only IE 10 supports it. All
>>others, FF, Chrome, Safari has had it for a good while.
>>
>>There exists also alternative workarounds like Comet, BOSH, push and
>>few others.
>>
>>So let
>>15.5.2012 2:18, Eugčne Ngontang kirjoitti:
>>
>>Hi Jani!
>>
>>I haven't seen the last statements of your post

Re: Use Django to implement my GUI!

[Eugène Ngontang]

Hi Jani!

Now you can understand what i meant, but I'm not just try to mec things
complicated.

I'm not talking here about my technical implementation, but i'm describing
the needs/contraints, and my app architecture to you.

-  The remote clients are at the heart of the software system, since data
stored in the database are destined to them (the server push each
information to the corresponding host)
- When a client starts, it trys to establish a connection with the server,
and if succeed, it retrieves its informations from the server. The server
then send back informations conerning the host executing the client (the
way server retrieves informations from the data base manager doesn't matter
here, it's a technical purpose)
- When a task state changes, it has to notify the server by sending a
packet through the network. The GUI (web browser) has then to display the
new state.
- When a user of the software wants to create a new task on a host, it uses
the GUI for the purpose, and the information has to be sent to the remote
corresponding client/host for processing.

Tell in my place, what logic would you adopt. I would like idea from you
guys in this case, before go on a first definitive choice.

I can see web sockets solves so much problems for developpers, and i'm
still looking if it could help achieve correctly what I want to. The
problem of IE < 10 for the instance is not so important.

Now also, can you try to advise me the best way for serving file using
python-Django (apache, unicorn, ..)?

Thanks again.

2012/5/15 Jani Tiainen 

> Hi,
>
> Now it starts to make "sense".
>
> I just wonder why are you trying to build something so extremely
> complicated?
>
> What is the rationale behind to have additional middleware layer between
> web ui and the server backend?
>
> Wouldn't it be sufficient to have architecture like:
>
> Browser <-> django middleware <-> remote backend
>
> Communication between django middle ware and remote backend should be
> built on top of some messaging system, like celery + rabbitmq which gives
> you quite standard asyncronous communication between django middleware and
> remote backend. Of course you might need to write some adapters on remote
> side but that's part of the job.
>
> Only real problem is that if you need to push changes to browser side.
> There doesn't exists any really good ways to do that. HTML5 was supposed to
> bring websockets to overcome the problem. One big problem is that only from
> IE series only IE 10 supports it. All others, FF, Chrome, Safari has had it
> for a good while.
>
> There exists also alternative workarounds like Comet, BOSH, push and few
> others.
>
> So let
> 15.5.2012 2:18, Eugčne Ngontang kirjoitti:
>
>> Hi Jani!
>>
>> I haven't seen the last statements of your post, whre you say I'm not
>> really clear and that i'm building a non-http GUI using Django.
>>
>>
>> OK let's stay on the rendering issue only, and specify things simply.
>> This is a simple description of the architecture I want to set up :
>>
>> - A Client (not a user interface). Client here means a module which is
>> installed in a remote computer and communicate with the server via socket.
>>
>> - A server listening from several remote client (Here i'm not talking
>> yet about http request), and receive informatons from them. In fact
>> client must be doing actions and send informations about their actions
>> to the server. In the oder hand data to be processed by each client is
>> pushed/dispatched by the server.
>>
>> - And admin (not Django Admin, but admin in the sens of my app),
>> destined to be the module allowing use of the application. Then the
>> Admin module is part of the server and will proviede a GUI for
>> manipulating data in the data base. It's in this GUI that users of the
>> application will enter their request, by filling a form or clicking a
>> link for exemple. And data from the GUI could be stored in the data
>> base, while being send to the remote clients (not to be displayed by the
>> client, but to be processed). In the same way, informations comming from
>> those clients to the server have to be diplayed in the GUI.
>>
>> With a graphical GUI, The server could have a reference to an object
>> representing my GUI, and it will be done.
>> But I choose a web GUI for view and administration. It's where Django
>> comes.
>>
>> And my problem is to make my server being running a network thread,
>> receiving data from the GUI(web browser) and sending informations update
>> to the GUI (for web page content).
>>
>> This is really my issue. If all the actions of my server depended on my
>> GUI request (http request), I could do what I like behind when handling
>> a http request, but while managing http:8080 connexions, the application
>> is running another process/thread on another TCP/UDP port.
>>
>> And yes I want a web GUI.
>>
>> Is why I'm looking the best way to achieve that. We can exclude Django
>> web server, as it will not be 

Re: Use Django to implement my GUI!

[Eugène Ngontang]

Hi Jani!

I haven't seen the last statements of your post, whre you say I'm not
really clear and that i'm building a non-http GUI using Django.


OK let's stay on the rendering issue only, and specify things simply. This
is a simple description of the architecture I want to set up :

- A Client (not a user interface). Client here means a module which is
installed in a remote computer and communicate with the server via socket.

- A server listening from several remote client (Here i'm not talking yet
about http request), and receive informatons from them. In fact client must
be doing actions and send informations about their actions to the server.
In the oder hand data to be processed by each client is pushed/dispatched
by the server.

- And admin (not Django Admin, but admin in the sens of my app), destined
to be the module allowing use of the application. Then the Admin module is
part of the server and will proviede a GUI for manipulating data in the
data base. It's in this GUI that users of the application will enter their
request, by filling a form or clicking a link for exemple. And data from
the GUI could be stored in the data base, while being send to the remote
clients (not to be displayed by the client, but to be processed). In the
same way, informations comming from those clients to the server have to be
diplayed in the GUI.

With a graphical GUI, The server could have a reference to an object
representing my GUI, and it will be done.
But I choose a web GUI for view and administration. It's where Django comes.

And my problem is to make my server being running a network thread,
receiving data from the GUI(web browser) and sending informations update to
the GUI (for web page content).

This is really my issue. If all the actions of my server depended on my GUI
request (http request), I could do what I like behind when handling a http
request, but while managing http:8080 connexions, the application is
running another process/thread on another TCP/UDP port.

And yes I want a web GUI.

Is why I'm looking the best way to achieve that. We can exclude Django web
server, as it will not be used in production for the application deployment.

Hope now it's clear for you, and more for the other users.

Thanks!

2012/5/13 Jani Tiainen 

> Hi,
>
> There is several ways to achieve what you maybe want to do. One of the
> simplest way is separate frontend (your userinterface) and server backend.
> You can build your Django application as a service (xml-rpc, json-rpc,
> restful). That would give you advantage to choose whatever frontend you
> like. Of course it would add some overhead.
>
> On Sun, May 13, 2012 at 1:14 PM, Eugene NGONTANG wrote:
>
>> Hi!
>>
>> I'm a python developper, but new in django.
>>
>> I'm devolopping a multi clients-server application.
>>
>> The server and the clients are communicating via sockets, The server
>> receive somme states from clients, and display them in the User
>> interface.
>> In the other hand, the server has to send a message(packet) to the
>> client when an event  occurs in the GUI, and data are stored in a
>> database.
>>
>>
> Note that Django is mainly built for web (HTTP protocol based)
> applications. In such an environment you run two different things: your GUI
> (usually browser) that is totally ignorant of server side (Django). Then
> you send request to some URL, Django routes it to some view and view
> produces again next output to be displayed in GUI (browser again). One of
> the common functions in the view is database manipulation.
>
>
>> Then I choose to make a web interface where data could be viewed and
>> manipulated. And I discovered Django, which fit all my needs. I tested
>> and liked the framework.
>>
>> My questions are:
>> - Can I override the djando admin methods so that i can not only
>> customized my views and html page, but also manipulate objects in
>> database, so that i can do another action when catching an  event in
>> the GUi.
>> For example, taking the django admin tutorial, I would like to do and
>> action like sending a message the user choose "add a poll". How can I
>> do those things? Cause I noticed that method that alter data in data
>> base are part of django admin module and cannot be overriden
>>
>>
> You shouldn't "fight against admin". If something cannot be done in the
> admin you usually get a way with writing your own stuff.
>
>
>> - To achieve what I want, i would like to run my server engine and my
>> django admin in two separated threads. How do i run my admin module in
>> a thread? Cause till now i'm using the command line "python manage.py
>> runserver
>>
>
> Again your GUI would run "somewhere" (it's not relevant) and it's not
> concern of Django. It's architecture is designed to be share nothing -
> which means that you can run several threads/processes of your applications
> - And those threads/processes are not aware of other existence. And it
> doesn't matter.
>
>
>> - I also 

Re: Use Django to implement my GUI!

[Eugène Ngontang]

Thanks Guys for all.
I will carefully look at all your suggestions and see what is better in a
production environment.
But the idea of having the possibility to abstract the frontend so that it
can be changed is the best i think and was what i intended to do after my
server become working and stable.

I want to run server engine(backend) in one thread catching and processing
network packets from clients, and my the fronted running in a separated
thread rendering data catching gui event.
I first choose to do it with cherrypy but it's not sweet for big projects
and the fronted would not be so generic that way.

I then discover django with its features and possibilities.

I hope i will make and implement the best choice with your help.

Thanks and see you soon.
Le 13 mai 2012 22:10, "John Yeukhon Wong"  a écrit :

> Maybe pyjs?
> Do the GUI part using Python (which renders into javascript), and you can
> connect it using Django as your backend.
>
> On Sunday, May 13, 2012 6:14:36 AM UTC-4, Eugene NGONTANG wrote:
>>
>> Hi!
>>
>> I'm a python developper, but new in django.
>>
>> I'm devolopping a multi clients-server application.
>>
>> The server and the clients are communicating via sockets, The server
>> receive somme states from clients, and display them in the User
>> interface.
>> In the other hand, the server has to send a message(packet) to the
>> client when an event  occurs in the GUI, and data are stored in a
>> database.
>>
>> Then I choose to make a web interface where data could be viewed and
>> manipulated. And I discovered Django, which fit all my needs. I tested
>> and liked the framework.
>>
>> My questions are:
>> - Can I override the djando admin methods so that i can not only
>> customized my views and html page, but also manipulate objects in
>> database, so that i can do another action when catching an  event in
>> the GUi.
>> For example, taking the django admin tutorial, I would like to do and
>> action like sending a message the user choose "add a poll". How can I
>> do those things? Cause I noticed that method that alter data in data
>> base are part of django admin module and cannot be overriden
>>
>> - To achieve what I want, i would like to run my server engine and my
>> django admin in two separated threads. How do i run my admin module in
>> a thread? Cause till now i'm using the command line "python manage.py
>> runserver"
>>
>> - I also tried to overide tables name, and foreign keys names. Could
>> you guys provide me a true life example?
>>
>> - And now in the production step, I would like you guys to tell me
>> what to choose for serving files. I would like to with your experience
>> what's better between running a unicorn server or apache with mod_wsgi
>>
>> I don't know if i'm clear, but i hope. In brief I'd like to use the
>> django framework features to design my Gui like i want, customize
>> interactions between the gui and the backend, and choose a good web
>> server for the production.
>>
>> Thank you for advance
>
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Re: Use Django to implement my GUI!

[Eugène Ngontang]

Yes, I can see tastypie is a good service, that even support REST protocol.

But I'd firt basically implement my gui with django and when i will master
well django, i could use tastypie, and turn my server to support REST, it
will be a good thing.

But please let's keep using only django for the begining.

Thanks.

2012/5/13 Alireza Savand 

> https://github.com/toastdriven/django-tastypie
>
>
> On Sunday, May 13, 2012 2:14:36 PM UTC+4, Eugene NGONTANG wrote:
>>
>> Hi!
>>
>> I'm a python developper, but new in django.
>>
>> I'm devolopping a multi clients-server application.
>>
>> The server and the clients are communicating via sockets, The server
>> receive somme states from clients, and display them in the User
>> interface.
>> In the other hand, the server has to send a message(packet) to the
>> client when an event  occurs in the GUI, and data are stored in a
>> database.
>>
>> Then I choose to make a web interface where data could be viewed and
>> manipulated. And I discovered Django, which fit all my needs. I tested
>> and liked the framework.
>>
>> My questions are:
>> - Can I override the djando admin methods so that i can not only
>> customized my views and html page, but also manipulate objects in
>> database, so that i can do another action when catching an  event in
>> the GUi.
>> For example, taking the django admin tutorial, I would like to do and
>> action like sending a message the user choose "add a poll". How can I
>> do those things? Cause I noticed that method that alter data in data
>> base are part of django admin module and cannot be overriden
>>
>> - To achieve what I want, i would like to run my server engine and my
>> django admin in two separated threads. How do i run my admin module in
>> a thread? Cause till now i'm using the command line "python manage.py
>> runserver"
>>
>> - I also tried to overide tables name, and foreign keys names. Could
>> you guys provide me a true life example?
>>
>> - And now in the production step, I would like you guys to tell me
>> what to choose for serving files. I would like to with your experience
>> what's better between running a unicorn server or apache with mod_wsgi
>>
>> I don't know if i'm clear, but i hope. In brief I'd like to use the
>> django framework features to design my Gui like i want, customize
>> interactions between the gui and the backend, and choose a good web
>> server for the production.
>>
>> Thank you for advance
>
>  --
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> https://groups.google.com/d/msg/django-users/-/uZMPKqBO1JcJ.
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-- 
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sympav...@gmail.com

*Aux hommes il faut un chef, et au** chef il faut des hommes!*

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