On Tue, Jun 10, 2014 at 7:53 PM, Anthony <[email protected]> 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
>>
>> --
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> - http://web2py.com/book (Documentation)
> - http://github.com/web2py/web2py (Source code)
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