ummm.... you might try the "easy" way -
add something like:
db.tablename.field.comment=T('(required)')
Take a look at how Massimo does this (and how it looks) in the regstration
form for PyCon Registration -
http://launchpad.net/web2conf
Regards,
Yarko
On Sun, Dec 14, 2008 at 5:28 PM, Fran <[email protected]> wrote:
>
> I want to be able to flag to the user that certain input fields are
> 'Required' (even before they hit 'Submit' & see the form failing to
> validate)
>
> To do this I decided to try & create a widget that would append to the
> normal INPUT box a SPAN(_class="req").
> I can then use CSS/JS to populate that span with a red asterisk (but
> keep it cutomisable by designers, if they wish).
>
> I followed the instructions here:
> http://mdp.cti.depaul.edu/AlterEgo/default/show/170
>
> Copying the default from sqlhtml.py +125, I added this widget to my
> customised T2 class:
> def input_required_widget(field,value):
> items=[DIV(INPUT(_type='text',
> _id=field_id,_class=field.type,_name=fieldname,value=str
> (default),requires=field.requires),SPAN(_class='req'))]
> return DIV(*items)
>
> I then added this to my model:
> db.cr_shelter.name.widget=t2.input_required_widget
>
> This gives the following error:
> Traceback (most recent call last):
> File "C:\Bin\web2py\gluon\restricted.py", line 62, in restricted
> exec ccode in environment
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 78,
> in <module>
> File "C:\Bin\web2py\gluon\globals.py", line 55, in <lambda>
> self._caller=lambda f: f()
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 40,
> in add_shelter
> form=t2.create(db.cr_shelter)
> File "C:\Bin\web2py\applications\sahana\modules\t2.py", line 414, in
> create
> showid=False,col3=col3,_class='t2-create')
> File "C:\Bin\web2py\gluon\sqlhtml.py", line 89, in __init__
> inp=field.widget(field,default)
> TypeError: input_required_widget() takes exactly 2 arguments (3 given)
>
>
> I searched around to see if there were other docs & found this:
>
> http://groups.google.com/group/web2py/browse_thread/thread/961d4303a7549241/a9d19abdfa4b6a07
>
> I tried bypassing the module & just put in a simple:
> db.cr_shelter.name.widget=lambda self,value: DIV(INPUT
> (_type='text'),SPAN(_class='req'))
>
> This displays correctly, but doesn't allow entered data to get stored
> in the db, presumably because the id isn't set on the field.
>
> I tried to add all the fields in:
> db.cr_shelter.name.widget=lambda self,value: DIV(INPUT(_type='text',
> _id=field_id,_class=field.type,_name=fieldname,value=str
> (default),requires=field.requires),SPAN(_class='req'))
>
> But then I get a scope problem:
> Traceback (most recent call last):
> File "C:\Bin\web2py\gluon\restricted.py", line 62, in restricted
> exec ccode in environment
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 78,
> in <module>
> File "C:\Bin\web2py\gluon\globals.py", line 55, in <lambda>
> self._caller=lambda f: f()
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 40,
> in add_shelter
> form=t2.create(db.cr_shelter)
> File "C:\Bin\web2py\applications\sahana\modules\t2.py", line 414, in
> create
> showid=False,col3=col3,_class='t2-create')
> File "C:\Bin\web2py\gluon\sqlhtml.py", line 89, in __init__
> inp=field.widget(field,default)
> File "C:\Bin\web2py\applications\sahana/models/db.py", line 517, in
> <lambda>
> db.cr_shelter.name.widget=lambda self,value: DIV(INPUT
> (_type='text', _id=field_id,_class=field.type,_name=fieldname,value=str
> (default),requires=field.requires),SPAN(_class='req'))
> NameError: global name 'field_id' is not defined
>
>
> I changed my model to:
> db.cr_shelter.name.widget=lambda self,value: t2.input_required_widget
>
> This gives no traceback, but instead of an INPUT box, I get the
> following:
> <bound method T2SAHANA.input_required_widget of
> <applications.sahana.modules.sahana.T2SAHANA instance at
> 0x04291698>>
>
> Trying:
> db.cr_shelter.name.widget=lambda self,value: t2.input_required_widget
> ('name')
>
> I'm back to the scope issue:
> Traceback (most recent call last):
> File "C:\Bin\web2py\gluon\restricted.py", line 62, in restricted
> exec ccode in environment
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 78,
> in <module>
> File "C:\Bin\web2py\gluon\globals.py", line 55, in <lambda>
> self._caller=lambda f: f()
> File "C:\Bin\web2py\applications\sahana/controllers/cr.py", line 40,
> in add_shelter
> form=t2.create(db.cr_shelter)
> File "C:\Bin\web2py\applications\sahana\modules\t2.py", line 414, in
> create
> showid=False,col3=col3,_class='t2-create')
> File "C:\Bin\web2py\gluon\sqlhtml.py", line 89, in __init__
> inp=field.widget(field,default)
> File "C:\Bin\web2py\applications\sahana/models/db.py", line 520, in
> <lambda>
> db.cr_shelter.name.widget=lambda self,value:
> t2.input_required_widget('name')
> File "C:\Bin\web2py\applications\sahana\modules\sahana.py", line
> 163, in input_required_widget
> NameError: global name 'field_id' is not defined
>
> This also happens even if I remove that global from my widget def:
> items=[DIV(INPUT
> (_type='text',_class=field.type,_name=field.name
> ,value=value,requires=field.requires),SPAN
> (_class='req'))]
>
> I'm not sure why there's a scope issue since my custom T2 has this
> line:
> from gluon.sqlhtml import *
>
>
>
> Searching some more:
>
> http://groups.google.com/group/web2py/browse_thread/thread/8f4ac3eb42b599f2/692bef480d3d5df9
>
> I tried this:
> db.cr_shelter.name.widget=lambda a,b: t2.input_required_widget(a,b,
> ['name'])
> No joy:
> TypeError: input_required_widget() takes exactly 2 arguments (4 given)
>
> I see that this widget has 3 arguments in it's def: (self,value,tags=
> [])
>
> Since we only have 2, I tried:
> db.cr_shelter.name.widget=lambda self,value: t2.input_required_widget
> (self,value)
> No joy:
> TypeError: input_required_widget() takes exactly 2 arguments (3 given)
>
>
> Going back to trying to fix the scope, I tried having this in the
> widget def:
> _id=gluon.sqlhtml.field_id
> No joy:
> NameError: global name 'field_id' is not defined
>
> Trying to see how T2's widgets deal with this I tried adding this to
> the widget def:
> field_id=self._tablename+'_'+self.name
> No joy:
> NameError: global name 'field_id' is not defined
>
>
> I really need a helping hand here ;)
>
> Many thanks,
> Fran.
> >
>
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