no I have not. No any authentication system (as cancan for example)
authentication based on a namespaces. In each namespace there is
BaseController that has :authenticate_dept_head! (it is an example for
dept_head namespace)

2010/9/17 Sergio Cambra .:: entreCables S.L. ::. <[email protected]>:
> On Viernes, 17 de Septiembre de 2010 11:22:23 Andrey Voronkov escribió:
>> can a conditions_for_collection makes department to load each time?
>> but it has no sense.
>
> conditions_for_collection is only called to bulid the list query, it isn't
> called for each row.
>
> I can see query is issued in list_actions partial, so probably some security
> method checks current_user.department. Have you defined some action_authorized
> method in your controller, or authorized_for_action method in your model?
>
>>
>> Here is listing from the top of action processing if it helps. As an
>> autientication system I use devise. And dept_head user belongs to
>> department. But I think it should'n be checked on each row.
>>
>> Processing DeptHead::TeachingPlacesController#index (for 127.0.0.1 at
>> 2010-09-17 19:09:40) [GET]
>>   DeptHead Load (3.5ms)   SELECT * FROM "users" WHERE ("users"."id" =
>> 4) AND ( ("users"."type" = 'DeptHead' ) ) LIMIT 1
>>   Department Load (43.8ms)   SELECT * FROM "departments" WHERE
>> ("departments"."id" = 1)
>>   SQL (99.3ms)   SELECT count(DISTINCT "teaching_places".id) AS
>> count_all FROM "teaching_places" LEFT OUTER JOIN "lecturers" ON
>> "lecturers".id = "teaching_places".lecturer_id LEFT OUTER JOIN
>> "positions" ON "positions".id = "teaching_places".position_id WHERE
>> (("teaching_places"."department_id" = 1))
>>   TeachingPlace Load (4.7ms)   SELECT "teaching_places".* FROM
>> "teaching_places" WHERE (("teaching_places"."department_id" = 1))
>> ORDER BY "teaching_places"."id" ASC LIMIT 30 OFFSET 0
>>   Lecturer Load (3.7ms)   SELECT * FROM "lecturers" WHERE
>> ("lecturers"."id" IN
>> (11,6,7,12,8,13,9,14,15,16,17,1,2,18,19,3,10,4,5))
>>   Position Load (1.7ms)   SELECT * FROM "positions" WHERE
>> ("positions"."id" IN (1,2,3))
>> Rendering template within layouts/application
>> Rendering list
>> Rendered _list_header (26.4ms)
>> Rendered _list_column_headings (35.9ms)
>> Rendered _messages (2.4ms)
>> Rendered _list_messages (186.4ms)
>> Rendered _list_record_columns (12.6ms)
>>   CACHE (0.0ms)   SELECT * FROM "departments" WHERE ("departments"."id" =
>> 1) Rendered _list_actions (75.7ms)
>> Rendered _list_record (121.6ms)
>> Rendered _list_record_columns (4.4ms)
>>   CACHE (0.0ms)   SELECT * FROM "departments" WHERE ("departments"."id" =
>> 1)
>>
>> ...
>>
>> 2010/9/17 Sergio Cambra .:: entreCables S.L. ::. <[email protected]>:
>> > On Viernes, 17 de Septiembre de 2010 01:29:30 Andrey Voronkov escribió:
>> >> This is an example of N+1 error in my case:
>> >>
>> >> ...
>> >>
>> >> CACHE (0.0ms)   SELECT * FROM "departments" WHERE ("departments"."id" =
>> >> 1) Rendered _list_actions (26.8ms)
>> >> Rendered _list_record (34.9ms)
>> >> Rendered _list_record_columns (4.4ms)
>> >>   CACHE (0.0ms)   SELECT * FROM "departments" WHERE ("departments"."id"
>> >> = 1) Rendered _list_actions (26.9ms)
>> >> Rendered _list_record (33.4ms)
>> >> Rendered _list_record_columns (4.3ms)
>> >>   CACHE (0.0ms)   SELECT * FROM "departments" WHERE ("departments"."id"
>> >> = 1)
>> >
>> > If you are excluding department column, why is department loaded? Is it
>> > used in some override? In a security check? Anyway you can override
>> > active_scaffold_includes:
>> >    def active_scaffold_includes
>> >     �...@active_scaffold_includes ||= [:department]
>> >    end
>> >
>> >> ...
>> >>
>> >> 2010/9/17 Andrey Voronkov <[email protected]>:
>> >> > I have model TeachingPlace that belongs to Department and to the
>> >> > Lecturer models and has table field called position.
>> >> > I want to rid off N+1 SQL requests. There is no N+1 if
>> >> > config.columns = [:lecturer, :department, :position]
>> >> >
>> >> > Person who works with this interface is a department agent so I have
>> >> > this two methods:
>> >> >
>> >> > protected
>> >> >
>> >> >  def before_create_save(record)
>> >> >    if dept = current_dept_head.department
>> >> >      record.department_id = dept.id
>> >> >    end
>> >> >  end
>> >> >
>> >> >  def conditions_for_collection
>> >> >    if @dept ||= current_dept_head.department
>> >> >      {:department_id => @dept.id}
>> >> >    else
>> >> >      {:department_id => nil}
>> >> >    end
>> >> >  end
>> >> >
>> >> > As you can guess I do not need to display department field in list or
>> >> > anywhere in this interface because the user knows what department he
>> >> > represents. But this:
>> >> > config.list.columns.exclude :department
>> >> > causes N+1 error. Is there any kind of descision of my trouble?
>> >
>> > --
>> > Sergio Cambra .:: entreCables S.L. ::.
>> > Mariana Pineda 23, 50.018 Zaragoza
>> > T) 902 021 404 F) 976 52 98 07 E) [email protected]
>> >
>> > --
>> > You received this message because you are subscribed to the Google Groups
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>> > more options, visit this group at
>> > http://groups.google.com/group/activescaffold?hl=en.
>
> --
> Sergio Cambra .:: entreCables S.L. ::.
> Mariana Pineda 23, 50.018 Zaragoza
> T) 902 021 404 F) 976 52 98 07 E) [email protected]
>
> --
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