Rails Counter Cache and its implementation
- by Ishu
Hello All,
I am trying to get hold of rails counter cache feature but not able to grasp it completely.
Let's say that We have 3 models
A B C
A belongs to B or C depending upon a field key_type and key_id. key_type tells whether A belongs to B or C so if key_type="B" then the record belongs to B otherwise it belongs to C.
In my model a.rb, I have defined following associations:
belongs_to :b, :counter_cache => true, :foreign_key => "key_id"
belongs_to :c, :counter_cache => true, :foreign_key => "key_id"
and
in b and c model files
has_many :as , :conditions => {:key_type => "B"}
has_many :as , :conditions => {:key_type => "C"}
Both B and C Models have a column as as_count
The problem is every time an object of a is created count is increased in the both the models b and c.
Any help is appreciated. Initially i thought that this may work:
belongs_to :b, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "B"}
belongs_to :c, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "C"}
But this does not help.
Thanks
