Can I test for count of a many to many field, in a Q query, along with other filters?

[Mark London]

If I'm creating a query using Q, can I make one of Q tests, be a count of a 
manytomany field?I.e., one of the Q filters, should test to see if a 
specific manytomany field, has a count greater than 5,   I know that I can 
use annotate to test for count.   But can annotate be specified within a Q 
query?   

If not, can I make 2 separate queries, and combine them, and eliminate 
duplicates?

Thanks! - Mark 

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Django module for a tag input field on a user form, with autocomplete & automatic adding new tags?

[Mark London]

I want to have a django form that has a field that allows inputting tags, 
with autocomplete functionality, and the ability to automatically add new 
tags. I was using django-tagulous for this, until I discovered that pasting 
a series of 3 or more comma delimited strings, would cause the browser to 
hang.


I have looked at the alternatives, but either they are mainly designed to 
be used by the admin module, or the documentation for implementation is 
very sparse, without a real hardcoded demo, which is included with the 
tagulous package. Can anyone help me out? Thanks very much!


Mark London

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Re: Need example of how to use a select2 widget for a manytomanyfield in django.

[Mark London]

I just discovered django-select2-forms.  It does exactly what I want, very 
simple to implement.

On Tuesday, November 10, 2015 at 5:08:46 PM UTC-5, Mark London wrote:
>
> I want to use a select2 widget to a manytomanyfield in django.  There are 
> several django-select2 modules, but the documentation on all of them is 
> confusing.   Can someone point me to a simple example of how to use a 
> select2 widget for a manytomanyfield?  Thanks. - Mark 
>
>
>

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Need example of how to use a select2 widget for a manytomanyfield in django.

[Mark London]

I want to use a select2 widget to a manytomanyfield in django.  There are 
several django-select2 modules, but the documentation on all of them is 
confusing.   Can someone point me to a simple example of how to use a 
select2 widget for a manytomanyfield?  Thanks. - Mark 


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Django, Bootstrap Tags input, and Typeahead?

[Mark London]

What is the easiest way to implement a django field with bootstrap and 
typeahead?  I found a module calleddjango-bootstrap-typeahead 
 
that looks exactly 
what I want. The instructions say to simply use "TypeaheadField" or 
"MultipleTypeaheadField" in n the django form.   I'm interested in using 
the MultipleTypeheadField feature, so that I can have the classic 
feature of being able to input tags, with typeahead.

I installed this boostrap/typeahead module, and then tried the 
test_project demo. See images. When I enter 2 tags into the 
"MultipleTypeaheadField", and then click submit, the first tag 
disappears, and only the 2nd tag is displayed by the code in views.py:

|messages.success(request,'MultipleTypeahead: %s'  %  
form.cleaned_data['multi_typeahead']|

See this page for image of the output from the demo:
http://stackoverflow.com/questions/32739556/best-method-to-implement-twitter-bootstrap-with-typeahead-in-django

Either I don't understand how the module is supposed to work, or the 
demo was not properly designed to show the list of all the inputted tags.

Should I use a different method?   Has anyone used this module?  Thanks. 
- Mark


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Re: Adding manytomany field, like "days of the week".

[Mark London]

Thanks for the response.  I had read about fixtures, but then people were 
saying that fixtures wasn't the best way to initialize the model, but they 
didn't give the alternative!   Next time, I won't listen to opinions, but 
will use code that actually works. - Mark 

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Adding manytomany field, like "days of the week".

[Mark London]

Hi - I'm a django newbie, so sorry if I'm doing something stupid (I did try 
to read the documentation.

I want to have a model, that has a manytomany field that stores days of the 
week, selected via a checkbox widget.  I read on the web, that I could put 
something like this in the model.

DAYS_OF_WEEK = (('1', 'Monday'),('2', 'Tuesday'),('3', 'Wednesday'),('4', 
'Thursday'),('5', 'Friday'),('6', 'Saturday'),('7', 'Sunday'),)
class Days(models.Model):
days = models.CharField(max_length=1, choices=DAYS_OF_WEEK)

The part of the model that references the days:

class Preferences(models.Model):
mail_days = models.ManyToManyField(Days)

The part of the form where the days are selected, is here:

DAYS_OF_WEEK = (
('1', 'Monday'),
('2', 'Tuesday'),
('3', 'Wednesday'),
('4', 'Thursday'),
('5', 'Friday'),
('6', 'Saturday'),
('7', 'Sunday'),
)

mail_days = forms.MultipleChoiceField(required=False,
widget=CheckboxSelectMultiple, choices=DAYS_OF_WEEK)

The form displays correctly, i.e. checkboxes for the days of the week 
appear. When I select the boxes, and hit submit, everything looks ok. But 
if I redisplay the form , the checkboxes are all empty.  But changes to the 
other form fields, that I made, get saved properly (As an aside, I'm using 
form.save(), not using commit=False).  So why do my checkboxes selections 
disappear?

Here's the SQL database table, that gets created for the days model. It's 
empty. It's not populated with anything. Shouldn't it be?

CREATE TABLE `myapp_days` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`days` varchar(1) NOT NULL,
PRIMARY KEY (`id`)) ENGINE=MyISAM DEFAULT CHARSET=latin1;

LOCK TABLES `todo_days` WRITE;
UNLOCK TABLES;

The selected days are getting saved into a table called 
myapp_preferences_my_days. So something is being saved.  Is this a model 
problem, or form problem?  Thanks.- Mark 

CREATE TABLE `myapp_preferences_mail_days` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `preferences_id` int(11) NOT NULL,
  `days_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `preferences_id` (`preferences_id`,`days_id`),
  KEY `myapp_preferences_mail_days_2d9474d5` (`preferences_id`),
  KEY `myapp_preferences_mail_days_96c2dc77` (`days_id`)
  ) ENGINE=MyISAM AUTO_INCREMENT=16 DEFAULT CHARSET=latin1;

LOCK TABLES `myapp_preferences_mail_days` WRITE;
INSERT INTO `myapp_preferences_mail_days` VALUES (15,1,6),(14,1,4),(13,1,5);
UNLOCK TABLES;

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Re: I need a form that allows users to select from a list of choices, or add a new choice.

[Mark London]

Great.  Thanks very much!

On Wednesday, February 27, 2013 6:13:05 PM UTC-5, Rainy wrote:
>
>
>
>
> On Wednesday, February 27, 2013 11:28:50 AM UTC-5, Mark London wrote:
>>
>> I need a widget or a method that allows users to select items from a list 
>> of choices, or add a new choice.   Someone on stackoverflow asked the same 
>> question, and got a kludgy answer:
>>
>>
>> http://stackoverflow.com/questions/14802167/how-do-i-make-a-django-choicefield-accept-both-preset-choices-and-the-addition-
>>
>> There should be a better way than this.  Thanks.
>>
>> - Mark 
>>
>
>
>
> Take a look at SelectOrCreateField (and its widget) here:
>
> http://lightbird.net/dbe2/issues.html#selectorcreatefield
>
>
> The screenshot is here:
>
> http://lightbird.net/dbe2/issues.html#addissues-template
>
>
>  -ak 
>

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I need a form that allows users to select from a list of choices, or add a new choice.

[Mark London]

I need a widget or a method that allows users to select items from a list 
of choices, or add a new choice.   Someone on stackoverflow asked the same 
question, and got a kludgy answer:

http://stackoverflow.com/questions/14802167/how-do-i-make-a-django-choicefield-accept-both-preset-choices-and-the-addition-

There should be a better way than this.  Thanks.

- Mark 

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Task/project management open source django application?

[Mark London]

Hi - I'm looking for an open source project/task management system, based 
on django.  Something like this one:

http://birdhouse.org/software/2008/09/django-todo/

Are there any others out there like this?  Thanks. 

- Mark 

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