Can create record but can not update it => has_many through

rubyonrails-talk
1

Hi All,

I have a problem using has_many through association. I can create a product without problem, but when i edit it, i got this NoMethodError:

undefined method `reciters=' for #<Product:0xb71a77e8>

Did i miss something to code? I provided the codes below. Please help

Thanks,

Dida

product_controller.rb

2

Hi All,

I have a problem using has_many through association. I can create a product without problem, but when i edit it, i got this NoMethodError:

undefined method `reciters=' for #<Product:0xb71a77e8>

Did i miss something to code? I provided the codes below. Please help

has_many :through doesn't have foos= before rails 2.1

Fred

3

Would you explain your answer a bit more? How come i can create a record without the error as i got when i was trying to update it? Any reference? Other solution to use instead?

Thanks,

Adinda P

4

> has_many :through doesn't have foos= before rails 2.1

Would you explain your answer a bit more? How come i can create a record without the error as i got when i was trying to update it? Any reference? Other solution to use instead?

Pretty much what I said. if you have has_many :customers you can do customers= ..., but if you have has_many :customers, :through => :something_else, then until 2.1 you can't do it. It's just not implemented (you'll have to do it yourself using the methods that are available - the documentation on associations has a table of which association types have which methods).

Fred

5

Pretty much what I said. if you have has_many :customers you can do

customers= …, but if you have has_many :customers, :through

=> :something_else, then until 2.1 you can’t do it. It’s just not

implemented (you’ll have to do it yourself using the methods that are

available - the documentation on associations has a table of which

association types have which methods).

I tried with @product.reciter_ids = params[:reciters] before and i also got NoMethodError. Please help.

unless params[:reciters].blank? @product.reciters = Qori.find(params[:reciters])

end

Thanks,

Adinda P

6

Pretty much what I said. if you have has_many :customers you can do customers= ..., but if you have has_many :customers, :through => :something_else, then until 2.1 you can't do it. It's just not implemented (you'll have to do it yourself using the methods that are available - the documentation on associations has a table of which association types have which methods).

I tried with @product.reciter_ids = params[:reciters] before and i
also got NoMethodError. Please help.

foo_ids= doesn't exist either. You need to use <<, delete etc... (or
upgrade to 2.1)

Fred