Ferret talk - Apr 2008 - find_with_ferret :multi not working for me (latest version) (apologies if this was already posted)

First of all, sorry if this appears in the list twice - i was awaiting
moderation all day and then finally joined the list properly and sent this
direct.

Previously, for all my ferret searches, i was using find_by_contents, like
this:

@stuff = LearningObject.find_by_contents("trumpet",
         #ferret options
         {:multi => [TeachingObject, LearningObject, Lesson, Course],
          :page => 1,
          :per_page => 15 },
         #find options
         {} )

That all worked fine.  We''ve upgraded to the latest ferret/a_a_f,
though,
which no longer uses find_by_contents: i believe we''re supposed to use
find_with_ferret instead.  However, if i do the equivalent, with
find_by_contents replaced with find_with_ferret, then the
''multi'' part
doesn''t work:  i get the same results as if i didn''t pass
multi at all.

Looking in the API ( http://projects.jkraemer.net/rdoc/acts_as_ferret/ ), it
looks like find_with_ferret doesn''t take a :multi option, so
i''m in the dark
over how to do multi-model searches now.

My ferret-indexed classes all have ":store_class_name => true",
which i read
was necessary for multi searches.  Can anyone help please?

(To make life a bit more complicated, two of the classes extend one of the
others, and i''d like a ferret search on the superclass to return
results
from both subclasses.  However, i''d settle right now for just having a
multi-model search that works)

thanks
Max Williams
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Hi!

what you''re experiencing is a result of the recent refactorings I did
to
the aaf code base. Sorry for the inconvenience this has caused you - I
didn''t find the time to document this properly yet.

I moved the multi search functionality from the class level methods
(like find_with_ferret) into the ActsAsFerret namespace. It has always
been a bit inconsistent calling find_with_ferret on one class, passing
in any other classes to search in via the :multi option.

To get multi search back, you should use ActsAsFerret::find like this:

@stuff = ActsAsFerret::find(
  "trumpet",
  [TeachingObject, LearningObject, Lesson, Course],
  { :page => 1, :per_page => 15 },
  {} # find options
)


Cheers,
Jens


-- 
Jens Kr?mer
Finkenlust 14, 06449 Aschersleben, Germany
VAT Id DE251962952
http://www.jkraemer.net/ - Blog
http://www.omdb.org/     - The new free film database

Hi Jens

That works great, thanks a lot!

And thanks generally for a_a_f, it''s invaluable for us.

max

On 14/04/2008, Jens Kraemer <jk at jkraemer.net>
wrote:
>
> Hi!
>
> what you''re experiencing is a resultH  of the recent refactorings
I did to
> the aaf code base. Sorry for the inconvenience this has caused you - I
> didn''t find the time to document this properly yet.
>
> I moved the multi search functionality from the class level methods
> (like find_with_ferret) into the ActsAsFerret namespace. It has always
> been a bit inconsistent calling find_with_ferret on one class, passing
> in any other classes to search in via the :multi option.
>
> To get multi search back, you should use ActsAsFerret::find like this:
>
> @stuff = ActsAsFerret::find(
>   "trumpet",
>
>   [TeachingObject, LearningObject, Lesson, Course],
>   { :page => 1, :per_page => 15 },
>   {} # find options
>
> )
>
>
> Cheers,
> Jens
>
>
> --
> Jens Kr?mer
> Finkenlust 14, 06449 Aschersleben, Germany
> VAT Id DE251962952
> http://www.jkraemer.net/ - Blog
> http://www.omdb.org/     - The new free film database
> _______________________________________________
> Ferret-talk mailing list
> Ferret-talk at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ferret-talk
>
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I just remembered the second part of my last question...

I have a superclass, Resource, which has two subclasses, TeachingObject and
LearningObject.  All the records that are saved are one of the subclasses.
However, i''d like to be able to do a ferret search on Resource and get
both
kinds of subclass, like when i do Resource.find(), which returns both kinds.

I''m having problems with the index though:  TeachingObject and
LearningObject both have :store_class_name => true, and they have their own
indexes.  When i try to build the index for Resource, it crashes with the
following trace, whether i have :store_class_name => true set for Resource
or not.  Any ideas, anyone?

thanks, max

NoMethodError: You have a nil object when you didn''t expect it!
The error occurred while evaluating nil.each_pair
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/instance_methods.rb:130:in
`to_doc''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/core_ext/object/misc.rb:28:in
`returning''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/instance_methods.rb:124:in
`to_doc''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/bulk_indexer.rb:19:in
`index_records''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/bulk_indexer.rb:19:in
`each''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/bulk_indexer.rb:19:in
`index_records''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/bulk_indexer.rb:29:in
`measure_time''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/bulk_indexer.rb:18:in
`index_records''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/ferret_extensions.rb:52:in
`index_model''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/class_methods.rb:79:in
`records_for_rebuild''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:66:in
`transaction''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/rails/activerecord/lib/active_record/transactions.rb:80:in
`transaction''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/class_methods.rb:74:in
`records_for_rebuild''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/ferret_extensions.rb:51:in
`index_model''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/ferret_extensions.rb:39:in
`index_models''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/ferret_extensions.rb:39:in
`each''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/ferret_extensions.rb:39:in
`index_models''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/local_index.rb:54:in
`rebuild_index''
        from
/home/jars/rails/lesson_planner/branches/bundles/vendor/plugins/acts_as_ferret/lib/class_methods.rb:28:in
`rebuild_index''
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