Hey,
I found in the documentation about has_one
*":primary_key Specify the method that returns the primary key used for the
association. By default this is id."*
My interpretation is that when I have a method in the model, I can point
:foreign_key to this method
has_one :participants_group, :class_name =>
"Group::Virtual::Participants",
:foreign_key => :id,
:primary_key => :participants_group_id,
:dependent => :destroy,
:inverse_of => :topic
private
def participant_group_id
# the result of this method should be taken as a foreign_key value in the
query.
# IMHO Query should be: SELECT "groups".* FROM "groups" WHERE
"groups"."type" IN ('Group::Virtual::Participants') AND "groups"."id" = 1
LIMIT 1
1
end
Instead the query is
SELECT "groups".* FROM "groups" WHERE "groups"."type" IN
('Group::Virtual::Participants') AND "groups"."id"* IS NULL *LIMIT 1
In ActiveRecord::Associations::AssociationScope#add_constraints line 70
there is
scope = scope.where(table[key].eq(*owner[foreign_key]*))
Which I think is wrong according to the documentation, because it just
accesses attributes
To match the documentations iit shoud rather be
scope = scope.where(table[key].eq(*owner.send foreign_key*))
Please tell me which should be true Documentation or Code, and please
either change the line, or the documentation.
Thanks Martin.
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