[Grok-dev] (no subject)

Tue Jul 27 22:41:44 EDT 2010

You are going to have to find 'text' in the request the way you have  
it setup.  See below

Sent from my iPod

On Jul 27, 2010, at 10:49 AM, "J. Cameron Cooper" <jccooper at gmail.com>  
wrote:

> Date: Tue, 27 Jul 2010 12:15:15 +0200
> From: Lumir Jasiok <lumir.jasiok at vsb.cz>
> Subject: [Grok-dev] Whats wrong wit my update method
> To: grok-dev at zope.org
> Message-ID: <4C4EB1B3.5030203 at vsb.cz>
> Content-Type: text/plain; charset="utf-8"
>
>  Hi,
>
> I am pretty new in Grok Development, so sorry for (probably) trivia
> question. I have small testing application in app.py
>
> import grok
>
> class Awbarcode(grok.Application,grok.Container):
>
>     def __init__(self):
>         super(Awbarcode, self).__init__()
>         self.title = 'AWBarcode manager'
>         self.text = "basic text"
>         self.next_id = 0
>
>     def addBarcode(self,text):
>         id = str(self.next_id)
>         self.next_id = self.next_id + 1
>         self[id] = Barcode(text)
>
>     def deleteBarcode(self,barode):
>         del self[barcode]
>
> class Barcode(grok.Model):
>
>     def __init__(self,text):
>         super(Barcode,self).__init__()
>         self.text = text
>
> class AwbarcodeIndex(grok.View):
>     grok.context(Awbarcode)
>     grok.name('index')
>
> class AddBarcode(grok.View):
>     grok.context(Awbarcode)
>     grok.name('addbarcode')
>
>     def update(self,text):
>
              self.context.addBarcode(self.request.get('text'))
>         #self.context.addBarcode(text)
>         self.redirect(self.url('index'))
>
> Also I have two .pt files, awbarcodeindex.pt:
>
> <html>
> <head>
> <title tal:content="context/title">Barcode manager</title>
> </head>
> <body>
> <h1 tal:content="context/title">Barcode manager</h1>
> <h2>Here you can see barcodes:</h2>
> <tal:block repeat="barcode context/values">
> <ul>
> <li tal:content="barcode/text">Barcode</li>
> </ul>
> </tal:block>
> </body>
> </html>
>
> and addbarcode.pt:
>
> <html>
> <body>
> <h2>Add barcode</h2>
> <form tal:attributes="action view/url"  method="POST">
>             New Barcode text: <input type="text" name="text" value=""
> /><br />
> <input type="submit" value="Add Barcode Text" />
> </form>
> </body>
> </html>
>
> So, if I manually add some barcode text, I can see it listed on the
> index page, but when I try to add new barcode text using url:
>
> http://localhost:8080/test/addbarcode
>
> I can see just "A system error occurred.", not form I have in
> addbarcode.pt  and in log file is "TypeError: Missing argument to
> update(): text". I must use this to add new text to the storage:
>
> http://localhost:8080/test/addbarcode?text=text1
>
> After that I can finally see form and add new barcode text.
>
> What I am doing wrong? Thanks for any help.
>
> The 'update' method runs before the template is displayed. See http://grok.zope.org/doc/current/tutorial.html#doing-some-calculation-before-viewing-a-page
>
> When you say "/test/addbarcode" you are going to the 'AddBarcode'  
> view, which uses its 'update' method first, which demands the data  
> it needs. If it fails, it fails, if it succeeds, you see  the  
> 'addbarcode.pt' template.
>
> You could create another view for the form and have it submit to  
> 'addbarcode', which then becomes a "thank you" page. Or, perhaps,  
> you could not require 'text' in the method params (text=None), and  
> look for the submit param value and test for proper data (text is  
> not empty/false) yourself inside the method before changing the  
> model. That would allow the form to load without params and also  
> submit to itself. This is (close to) what happens in http://grok.zope.org/doc/current/tutorial.html#simple-forms
>
> As already mentioned, though, it would probably be a good idea to  
> look into automatic forms.
>
>                     --jcc
> -- 
> J Cameron Cooper
> jccooper at gmail.com
> anything at jcameroncooper.com
> mobile: 713.882.7395
> Skype: jcameroncooper
> _______________________________________________
> Grok-dev mailing list
> Grok-dev at zope.org
> https://mail.zope.org/mailman/listinfo/grok-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.zope.org/pipermail/grok-dev/attachments/20100727/8c85e8a1/attachment.html 