accepts_nested_attributes_for with has_many => :through Options

Question

I have two models, links and tags, associated through a third, link_tags. The following code is in my Link model.

Associations:

class Link < Acti         


        

Answer 1

Take a look at the line of your code

<% f.fields_for :tags_attributes do |tag_form| %>

You need to use just :tags instead of :tags_attributes. This will solve your issue

Make sure that You have build links and tags in your controller like

def new
  @link = @current_user.links.build
  @link.tags.build
end

Answer 2

In order for this to work, you need to pass in the right params hash:

params = {
  :link => {
    :tags_attributes => [
      {:tag_one_attr => ...}, {:tag_two_attr => ...}
    ],
    :link_attr => ...
  }
}

And your controller will look like:

def create
  @link = Link.create(params[:link]) # this will automatically build the rest for your
end

Answer 3

I found this here on stackoverflow:

Rails nested form with has_many :through, how to edit attributes of join model?

please tell me if it worked.

Answer 4

In your controller in the new action (that loads the form partial), are you building a @tag through your link?

So you should see something along the lines of:

@link = Link.new
@tag = @link.tags.build

It might be best to post the contents of the new and create action of your links_controller.

Answer 5

Try this:

<% f.fields_for :tags_attributes do |tag_form| %>

Answer 6

try

<% f.fields_for :tags do |tag_form| %> 

(ie lose the _attributes in :tag_attributes) That's how I've usually done nested forms