Rails cannot Create Record with Active Record Associations

Question

My code works when I run the action like this,

def interest
    @interest = Interest.new
    @interest.user_id = current_user.id
    @interest.idea_id = @idea.id
    @interest.save
    @ideas = Idea.take(10)
    flash[:notice] = "A message has been sent to the poster."
    render "ideas/forum"
end

But,why do I get an undefined method for 'interest' when I use this line in my Interest action?

@interest = current_user.ideas.interest.create(params[:interest])

Here's my Idea model

class Idea < ActiveRecord::Base
    belongs_to :user
    :title
    :category
    :content
    :user_id
    :createdDate
    :updatedDate

Here's my User model (Devise)

class User < ActiveRecord::Base
    has_many :ideas
    has_many :interests
end

Here is the button_to tag

<%= button_to "I'm Interested", ideas_interest_path(:id => idea.id, :idea_id => idea.id, :user_id => idea.user_id) ,class: 'btn btn-primary' %>

And my route,

resources :ideas do
    resources :interests
end

Interest Model class Interest < ActiveRecord::Base belongs_to :user belongs_to :idea

has_many :users

:idea_id :user_id

end

NoMethodError - undefined method `interest' for #<Idea::ActiveRecord_Associations_CollectionProxy:0x007f9e5189bab0>:

activerecord (4.2.0)

Add has_and_belongs_to_many :interests in your Idea model. — Sharvy Ahmed
@SharvyAhmed Tried it from idea and interest and the relationship did not change the error. — snowYetis
@SharvyAhmed check again, I think an edit, deleted it prior. — snowYetis

Sharvy Ahmed Sharvy Ahmed · Accepted Answer · 2015-03-14T19:53:32

I think you messed up the association, I'd do:

class User < ActiveRecord::Base
  has_many :interests
  has_many :ideas, through: :interests
end

class Interest < ActiveRecord::Base
  belongs_to :user
  belongs_to :idea

  # user_id, idea_id
end

class Idea < ActiveRecord::Base
  has_many :interests
  has_many :users, through: :interests
end

Then I guess the rest would work.

Rails cannot Create Record with Active Record Associations

1 Answers