Question

I am having a problem getting the params of a nested form in the following case:

I have these 3 nested models:

Meeting:

class Meeting < ActiveRecord::Base
 has_many :participants
end

Participant:

class Participant < ActiveRecord::Base
 belongs_to :meeting
 has_many :connections
end

and Connection:

class Connection < ActiveRecord::Base
 belongs_to :participant, :foreign_key => 'connected_participant_id'
end

And these routes:

resources :meetings do
    resources :participants
end

resources :participants do
    resources :connections
end

I succesfully made a form to create participants and add them directly to a meeting with something like this:

In the view > meeting/show:

= link_to 'Add current user to meeting', new_meeting_participant_url(@meeting)

In the view > participant/new:

= form_for [@meeting, @participant] do |p|
    *form details*

When creating i successfully receive params[:meeting_id], however when doing the same when creating a connection between participants with the following configurations I don’t get the params I need

in the same view > meeting/show:

- @meeting.participants.each do |participant|
    = link_to new_participant_connection_url(participant)

and again the form view > connection/new:

= form_for [@participant, @connection] do |c|

by debugging i noticed the needed params[:participant_id] are not set.

Can anyone please help me with my problem? I’m really stuck here.

Answer 1

Maybe you should take a look at ActiveRecord::NestedAttributes::ClassMethods accepts_nested_attributes_for