On Tuesday, April 2, 2013 10:57:57 AM UTC+2, [email protected] wrote:
>
> Thank you for your reply again :)
> Okay, i just did a google search on the term "foobar", and haha i have
> been wondering why does it appear anywhere!
> anyway, hmm, it seems clearer with your examples. so if i were to use
> args, like you said, to turn on bulb 1, i will put it as something like:
>
> <a href = "{{=URL('test', args =['bulb', '1', 'on'])}}"><img src
> ="/Comfort2/static/images/on.jpg" width ="75" height="75"></a> ?
>
> in default.py, i put this?
>
> if request.args(0)=='1':
> serialport.write("\x03O!0101\x0D") # serial command to turn the
> light on.
>
>
[bulb, 1, on] "translates" to
request.args(0) = bulb
request.args(1) = 1
etc etc etc (i.e. numbering starts from 0)
> and if using vars:
>
> <a href = "{{=URL('test', vars = dict(bulb='1', state='on' ))}}"><img src
> ="/Comfort2/static/images/on.jpg" width ="75" height="75"></a> ?
>
> if request.vars ={'bulb':1, 'state' :on}
> serialport.write("\x03O!0101\x0D") # serial command to turn the
> light on.
>
better to be a little less specific
if request.vars.bulb == '1' and request.vars.state == 'on':
>
> what about the following URL? what will it do?
>
> <a href = "{{=URL('test', args =['bulb', '1'], vars =
> dict(state='on'))}}"><img src ="/Comfort2/static/images/on.jpg" width ="75"
> height="75"></a>
>
>
request.args(0) = bulb
request.args(1) = 1
request.vars.state = 'on'
all of this can be discovered if you turn the response.generic_patterns on
and you do (for testing purposes) a simple
def test():
return dict()
In the generic view there's included "response toolbar" that you can use to
"inspect" what's going on (e.g., what request.args is specifically)
Or, if you have a view already, include at the top
{{=response.toolbar()}}
to show it.
> And all the above are in the same function 'test', so can i omit 'test' in
> the URL?
>
See the book on how to use the URL() function.
http://web2py.com/books/default/chapter/29/04#URL
URL() without arguments "points" to the app/controller/function that
generated it.
>
> thanks again!
>
> On Tuesday, April 2, 2013 4:28:50 PM UTC+8, Niphlod wrote:
>>
>> /app/default/test
>> points to executing your test() inside the controller named default.py
>> args and vars are, in respect
>> - args : /app/default/test/*1/2/3*
>> - vars : /app/default/test?*foo=bar&foo=bar2&hello=world*
>>
>> To sum up, args are fine if you want cleaner urls, but you can't put
>> whatever you want on them (imagine something like /app/default/test/*
>> รนร +:\*/
>> , not a "smart" way to pass garbles on the url, but, e.g., something like
>> /app/default/test/*1/on* where *1 *is the "bulb" number and *on* is the
>> "action" you want to do seems fine).
>> "Vars" on the other hand allow more flexibility, "garbled" parameters are
>> allowed...maybe the nicest "feature" is that if you need a single variable
>> holding multiple values "vars" parses them automatically (e.g. "turn on
>> bulb 1 and bulb 2" can be done with /app/default/test?*
>> bulb=1&bulb=2&action=on*) . Urls are not "clean" as with "args" but the
>> functionality is the same.
>>
>> Bottomline, use what you feel appropriate, either one would do just fine.
>>
>> On Tuesday, April 2, 2013 9:56:25 AM UTC+2, [email protected] wrote:
>>>
>>> Hi guys! Sorry but I still do not quite understand after reading the
>>> chapters about "Dispatching" and "URL". i guess my programming foundation
>>> isn't that strong... and i have problem understanding without referring to
>>> examples.
>>>
>>> Here is my situation and i would like to get a general idea on how to
>>> solve the problem. May be my idea was wrong so please correct me :)
>>>
>>> I have just successfully connect a device to my Raspberry Pi, with
>>> web2py as the webserver on Raspberry pi. Currently, i have created a home
>>> page using the template, and there is a "Login" button on it. When i click
>>> on the image (button), it directs me to default/test.html. the device gets
>>> the login information and turns on and off the testlight.
>>>
>>> in default/index.html:
>>>
>>> <a href = "{{=URL
>>> <https://10.0.0.132/examples/global/vars/URL>(c='default',
>>> f='test')}}"><img src ="/Comfort2/static/images/login.jpg" width ="128"
>>> height="69"></a>
>>>
>>>
>>> in default.py:
>>>
>>> def test():
>>> import serial
>>> import time
>>> response <https://10.0.0.132/examples/global/vars/response>.flash=T
>>> <https://10.0.0.132/examples/global/vars/T>("welcome home!")
>>> time.sleep(1)
>>>
>>> serialport= serial.Serial("/dev/ttyAMA0", 9600, timeout=0.5) #opening
>>> the port
>>>
>>>
>>> serialport.write("\x03LI1234\x0D") #write a serial command to log into
>>> the device
>>> reply=serialport.readlines(1)
>>> print reply
>>> time.sleep(1)
>>> serialport.write("\x03O!0101\x0D") #turn on a testlight
>>> time.sleep(2)
>>> serialport.write("\x03O!0100\x0D") #turn off a testlight
>>> return dict()
>>>
>>>
>>> However, i would like to separate it into a few tasks. So, after
>>> pressing the "login" button, it will only login and direct me to test.html
>>> with 2 buttons (Turn on light and turn off light). if i press on the turn
>>> on light button, the testlight will turn on and same for the other one. I
>>> would like all these to be under one function because the commands can only
>>> be sent when it is logged into the device. (if it is under another
>>> function, i will need to login again.) So do i need to use args and vars at
>>> this point?
>>>
>>> I do not really understand what is args and vars and how are they used.
>>> the information in the chapters taught me that
>>> request.args = ['x', 'y', 'z']
>>> request.vars={'p':1, 'q':2}
>>>
>>> but what are x,y,z,p, q, 1 and 2? under what conditions are they
>>> declared and where do they appear?
>>>
>>> Another question: can i display a jQuery keypad using web2py?
>>>
>>> My progress using cherrypy is slightly more ahead than web2py. i am sure
>>> i can transfer my work in cherrypy over to web2py... but i must get the
>>> whole concept clear... please help me.
>>> sorry that i sound very noob.... but much thanks to everyone for your
>>> patience and guidance! :)
>>>
>>
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