activerecord - Rails polymorphic associations - has_many condition error -

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i'm using rails 3.2.8 , i'm having troubles polymorphic associations. have model activity polymorphic related polymorphic model contribution can asset_file, biography, dynamic_annotation or citation.

so grandfather activity...the father contribution , sons (of contributions) biographies, asset_file, dynamic_annotations or citations.

i model thing aggregate of concepts have next code:

  has_many :activities,             :order => 'created_at desc',             :dependent =>:delete_all    has_many :contributions,            :through => :activities,            :source => :activable,            :source_type => "contribution"    has_many :dynamic_annotations,            :through => :contributions,            :source => :contributable,            :source_type => "dynamicannotation",            :conditions => {"contributions.c_state" => "accepted"}    has_many :biographies,            :through => :contributions,            :source => :contributable,            :source_type => "biography",            :conditions => {"contributions.c_state" => "accepted"}    has_many :citations,            :through => :contributions,            :source => :contributable,            :source_type => "citation",            :conditions => {"contributions.c_state" => "accepted"}    has_many :asset_files,            :through => :contributions,            :source => :contributable,            :source_type => "assetfile",            :conditions => {"contributions.c_state" => "accepted"}

the problem: opened console , typed next query:

thing.first.biographies

the sql got:

select `biographies`.* `biographies` inner join `contributions` on `biographies`.`id` = `contributions`.`contributable_id` inner join `activities` on `contributions`.`id` = `activities`.`activable_id` `activities`.`thing_id` = 1 , `activities`.`activable_type` = 'contribution' , (`contributions`.`c_state` = 'accepted') , (`contributions`.`contributable_type` = 'biography')

that correct answer

then typed after command:

thing.first.dynamic_annotations

the sql got:

select `dynamic_annotations`.* `dynamic_annotations` inner join `contributions` on `dynamic_annotations`.`id` = `contributions`.`contributable_id` inner join `activities` on `contributions`.`id` = `activities`.`activable_id` `activities`.`thing_id` = 1 , `activities`.`activable_type` = 'contribution' , (`contributions`.`c_state` = 'accepted') , (`contributions`.`contributable_type` = 'biography' , `contributions`.`contributable_type` = 'dynamicannotation')

i got void result because object cannot have 2 types of corse.

if can me apreciate :)

thanks in advance,

i found rails issue: https://github.com/rails/rails/issues/3882 workaround "alarribeau" solve problem. not fix can you.


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