Re: [Rails] has_many with model name as foreign key

Ruby on Rails Saturday, December 27, 2014

thx,

but with polymorphic associations, i always need to set a foreign key column,

my need is to set only the column type (model name)...

class Picture < ActiveRecord::Base
  belongs_to :imageable, polymorphic: true

#table pictures (id, name, imageable_id, imageable_type)
# how use it without imageable_id
end
 
class Employee < ActiveRecord::Base
  has_many :pictures, as: :imageable
end
 
class Product < ActiveRecord::Base
  has_many :pictures, as: :imageable
end









Le samedi 27 décembre 2014 17:00:35 UTC+1, Vivek Sampara a écrit :
Hi,

Fistly, dont create a model with the name "Attribute". Some of the rails core methods uses "attributes" . Use something like "custom_attributes" . 

Next, to make a model belong_to different models on the same foreign_key, Make sure you use polymorphic-associations  in rails. 

On Sat, Dec 27, 2014 at 6:47 AM, fmh <aph...@gmail.com> wrote:
Hi,

It's possible to do this :

models:
  • product has_many attributes
  • user has_many attributes
  • other_model has_many attributes

model attribute belongs to
  • product , but the foreign_key is not product_id but the mode name (Product) stored in table attributes(id, name, model)
  • user , but the  foreign_key is not product_id but the mode name (Product) stored in table attributes(id, name, model)

I want associate the attributes model with whole model and not with single record.

thx



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Posted by Ruby on Rails at 8:19 AM

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