[Catalyst] Similar attribute appears twice despite a single POST (submit) request.
Hi, everyone,
I have come across something interesting.
1) User opens up a page that lists all his/her subscriptions
2) Each subscription is a url and a parameter at the end (ie 'id=3325')
3) User decides to edit one of the subscriptions. He/she clicks on one
with an id of 3389 (hence the url will point to
http://lginsurance.com.au/subscriptions/edit?id=3389;)
4) My controller, sub edit gets called, it works out some hidden values
and returns a web form/
5) The web form contains the following:
a) 'name' = Text box for subscription alias
b) 'nominated_agent_code' = Text box for nominated agent code
c) 'id' = Hidden value which has the id of the current subscription
in question
5.5) The url is now http://lginsurance.com.au/subscriptions/edit?id=3389;
6) The user makes the necessary changes to name and/or nominated agent
code on the web form and clicks 'submit'
6.5) The Catalyst debug is as follows. Observe that the 'id' appears twice!
[info] *** Request 3 (0.176/s) [24288] [Wed Apr 29 20:57:20 2009] ***
[debug] Query Parameters are:
.-+--.
| Parameter | Value
|
+-+--+
| id | 3389 |
'-+--'
[debug] Body Parameters are:
.-+--.
| Parameter | Value
|
+-+--+
| id | 3389
|
| name| fire and theft-main concourse
level |
| submit | submit
|
| nominated_agent_id | 4|
'-+--'
[debug] POST request for users/subscriptions/update from 123.243.50.59
[debug] Found sessionid d11552045b04ccd6734582a4220d47398d022325 in cookie
[debug] Restored session d11552045b04ccd6734582a4220d47398d022325
7) my controller, sub edit gets called.
This time, I extract all the values I got from the web form using
$c-request-params-{ attribute-name }; where attribute-name would be
'name','nominated_agent_code' and 'id'.
When I used data dumper to print out the value I got for 'id' , I
observed that 'id' is made out of an array of two values: '3389' and
'3389' (yet again!).
Guys, if the user is clicking on the submit button in step 6, that's a
POST request. So, why is the a 'query parameters' block present? From my
understanding, a query_parameter block is for GET requests.
I know that to get the 'id' I want which is from the body parameters, I
should use $c-request-body_parameters{'id'} but in doing so, it looks
like I am avoiding the problem and its cause rather than understand what
it is about.
Help!
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Re: [Catalyst] Similar attribute appears twice despite a single POST (submit) request.
On Wed, 2009-04-29 at 21:22 +1000, kakim...@tpg.com.au wrote: Hi, everyone, I have come across something interesting. 5) The web form contains the following: a) 'name' = Text box for subscription alias b) 'nominated_agent_code' = Text box for nominated agent code c) 'id' = Hidden value which has the id of the current subscription in question This is just a stab in the dark, but I guess your form tag is missing an action attribute and thus resends to the same URI, thus keeping the id query parameter. This is according to specification: nothing in HTTP disallows using GET-Parameters in POST requests IIRC. Cheers, Sebastian ___ List: Catalyst@lists.scsys.co.uk Listinfo: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst Searchable archive: http://www.mail-archive.com/catalyst@lists.scsys.co.uk/ Dev site: http://dev.catalyst.perl.org/
Re: [Catalyst] Similar attribute appears twice despite a single POST (submit) request.
Akimoto, You really need to read up on HTTP and the difference between Query Parameters and Body Parameters. It will help you write better applications. Hello, J, Good evening. Yes, you're very right and I have been referring to documentation on search.cpan.org especially the catalyst tutes, J Rockway's book and Catalyst::Request documentation. Yes, reading the Catalyst::Request documentation, I was aware that $c-request-params was a combination of both query and body parameters. Are you able to provide us with a good example of the usefulness of getting parameters from both query and body? I thought it would be neater to take the parameters from either one source only (not both ). Can you please recommend some documentation related to HTTP and the difference between Query Parameters and Body Parameters? I googled with 'HTTP and the difference between Query Parameters and Body Parameters.' but didn't get anything interesting. If you simply change your form tag to be form method=post action= http://lginsurance.com.au/subscriptions/edit; there will be no query parameter present. You most certainly have the action set to http://lginsurance.com.au/subscriptions/edit?id=3389;, which is what is populating the GET parameter. Yes, I made the change here and problem solved. I understand what you and Sebastian Willert mean now. I made sure that my form had an action of 'http://lginsurance.com.au/subscriptions/edit' (without ?id=3389) and it works beautifully. It now knows that it has to call my controller, sub edit which accepts requests of path, '/subscriptions/edit'. Thank you for your time, J! K. akimoto -Jay ___ List: Catalyst@lists.scsys.co.uk Listinfo: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst Searchable archive: http://www.mail-archive.com/catalyst@lists.scsys.co.uk/ Dev site: http://dev.catalyst.perl.org/
Re: [Catalyst] Similar attribute appears twice despite a single POST (submit) request.
This is just a stab in the dark, but I guess your form tag is missing an action attribute and thus resends to the same URI, thus keeping the id query parameter. This is according to specification: nothing in HTTP disallows using GET-Parameters in POST requests IIRC. Cheers, Sebastian Yes, I made sure that the action of the form is now pointing to '/subscriptions/edit' and it works beautifully. Problem solved. Thank you, Sebastian. K. akimoto ___ List: Catalyst@lists.scsys.co.uk Listinfo: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst Searchable archive: http://www.mail-archive.com/catalyst@lists.scsys.co.uk/ Dev site: http://dev.catalyst.perl.org/
