Assuming you have a particular parent last name, it would be:
IS_IN_DB(db(db.parent.lname == last_name), 'parent.id', db.parent._format,
multiple=True)
Anthony
On Tuesday, June 10, 2014 12:51:20 PM UTC-4, Mandar Vaze wrote:
>
>
> On Tue, Jun 10, 2014 at 7:53 PM, Anthony <abasta...@gmail.com> wrote:
>
>> The first argument to IS_IN_DB must be a DAL object or a Set object -- it
>> cannot be a function.
>>
>
> Right, but is there a way to achieve what I am trying to do ? an example
> would help.
> Can/should I use IS_IN_SET ? (I got different error mentioned above)
>
> I think I'm missing something important
>
> Thanks,
> -Mandar
>
>
>
>>
>> Anthony
>>
>>
>> On Tuesday, June 10, 2014 10:05:21 AM UTC-4, Mandar Vaze wrote:
>>>
>>> when using default 'list:reference mytable' all the entries from mytable
>>> are shown in the dropdown (when using SQLFORM.grid)
>>> I want to show the list in the drop down after applying some filters
>>>
>>> Here is an example :
>>>
>>> db.define_table('parent',
>>> Field('fname', 'string'),
>>> Field('lname', 'string'),
>>> format='%(fname)s %(lname)s'
>>> )
>>>
>>> def get_parents(lname):
>>> return db(db.parent.lname == lname)
>>>
>>> db.define_table('child',
>>> Field('first_name', 'string'),
>>> Field('last_name', 'string'),
>>> Field('parents', 'reference parent',
>>> requires=IS_IN_DB(lambda row: get_parents(row.
>>> child.last_name), 'parent._format')),
>>> format='%(fname)s %(lname)s'
>>> )
>>>
>>>
>>> Here the idea is the when associating an entry from parent table - only
>>> those values are shown where last name of child matches that of the parent
>>> Obviously the example is "made up" - real scenario is bit complicated -
>>> but I am getting following error :
>>>
>>> AttributeError: 'function' object has no attribute 'db'
>>>
>>>
>>>
>>> web2py™ Version 2.9.5-stable+timestamp.2014.03.16.02.35.39
>>>
>>> Traceback
>>>
>>> Traceback (most recent call last):
>>> File "/path/to/web2py/gluon/restricted.py", line 220, in restricted
>>> exec ccode in environment
>>> File "/path/to/web2py/applications/parents/controllers/appadmin.py"
>>> <http://127.0.0.1:8080/admin/default/edit/parents/controllers/appadmin.py>,
>>> line 674, in <module>
>>> File "/path/to/web2py/gluon/globals.py", line 385, in <lambda>
>>> self._caller = lambda f: f()
>>> File "/path/to/web2py/applications/parents/controllers/appadmin.py"
>>> <http://127.0.0.1:8080/admin/default/edit/parents/controllers/appadmin.py>,
>>> line 153, in insert
>>> form = SQLFORM(db[table], ignore_rw=ignore_rw)
>>> File "/path/to/web2py/gluon/sqlhtml.py", line 1151, in __init__
>>> inp = self.widgets.options.widget(field, default)
>>> File "/path/to/web2py/gluon/sqlhtml.py", line 273, in widget
>>> options = requires[0].options()
>>> File "/path/to/web2py/gluon/validators.py", line 559, in options
>>> self.build_set()
>>> File "/path/to/web2py/gluon/validators.py", line 531, in build_set
>>> table = self.dbset.db[self.ktable]
>>> AttributeError: 'function' object has no attribute 'db'
>>>
>>> I am OK to use "list:string" with IS_IN_SET() as well - but I am unable
>>> to use "lambda row: get_parents(row.child.last_name)"
>>> I get "function is not iterable" error (Off course I will change
>>> get_parents() function to return list of strings based on my query)
>>>
>>> -Mandar
>>>
>>> --
>> Resources:
>> - http://web2py.com
>> - http://web2py.com/book (Documentation)
>> - http://github.com/web2py/web2py (Source code)
>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>> ---
>> You received this message because you are subscribed to a topic in the
>> Google Groups "web2py-users" group.
>> To unsubscribe from this topic, visit
>> https://groups.google.com/d/topic/web2py/nDBOL7w6qB4/unsubscribe.
>> To unsubscribe from this group and all its topics, send an email to
>> web2py+unsubscr...@googlegroups.com.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
"web2py-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to web2py+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
