has_many :through habtm

[slavix]

Here is my setup:

class Product < ActiveRecord::Base
  belongs_to :catalog
  has_and_belongs_to_many :product_groups
end

class ProductGroup < ActiveRecord::Base
  belongs_to :catalog
  has_and_belongs_to_many :products
end

class Catalog < ActiveRecord::Base
  has_many :product_groups
  has_many :products, :through => :product_groups
end

I get:
Invalid source reflection macro :has_and_belongs_to_many for
has_many :products, :through => :product_groups.  Use :source to
specify the source reflection.

----------
I have seen a few threads with posts asking this question, but found
no suitable solution or workaround..
any ideas please.



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[Matt Jones]

As written, there's no direct way to do this association in Rails. But
wouldn't it be sufficient to use a plain has_many :products in
Catalog? You've got a corresponding belongs_to in Product...

--Matt Jones

On Jul 9, 6:42 pm, slava <mikerin.sl...@...> wrote:

> Here is my setup:
>
> class Product < ActiveRecord::Base
>   belongs_to :catalog
>   has_and_belongs_to_many :product_groups
> end
>
> class ProductGroup < ActiveRecord::Base
>   belongs_to :catalog
>   has_and_belongs_to_many :products
> end
>
> class Catalog < ActiveRecord::Base
>   has_many :product_groups
>   has_many :products, :through => :product_groups
> end
>
> I get:
> Invalid source reflection macro :has_and_belongs_to_many for
> has_many :products, :through => :product_groups.  Use :source to
> specify the source reflection.
>
> ----------
> I have seen a few threads with posts asking this question, but found
> no suitable solution or workaround..
> any ideas please.

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[slavix]

yeah, I think it is sufficient. thanks.
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