Question

I am the following error

ActiveRecord::AssociationTypeMismatch in ProposalsController#create

User(#78682120) expected, got String(#68929150)
Rails.root: /home/james/app

Application Trace | Framework Trace | Full Trace
app/controllers/proposals_controller.rb:76:in `new'
app/controllers/proposals_controller.rb:76:in `create'
Request

Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"0qTzQ/KMA2Ch60aajSg265tThfCTBCB7w0rS8nD4Qwg=",
 "proposal"=>{"phones"=>"",
 "broadband"=>"",
 "fixed_line"=>"",
 "group_calling"=>"",
 "frequent_txt"=>"",
 "frequent_data"=>"",
 "type"=>"TelecommunicationsProposal",
 "contact_type"=>"",
 "extra_options"=>"",
 "current_provider"=>"",
 "closing_date"=>"03/12/2012",
 "users"=>["#<User:0x961c9e4>"]},
 "commit"=>"Create Proposal"}

I am trying to have a relationship such that a user has many proposals, and the proposal can have many users.

I have it that I can get the proposals for each user, but need it to be the other way around also.

Proposal.rb

 class Proposal < ActiveRecord::Base
      has_many :users
    ...

TelcommunicationsProposal.rb

class TelecommunicationsProposal < Proposal
  belongs_to :users
  after_create :proposal_creation
  ...

ProposalsController.rb
Error breaks on line 76 which is the Proposal.new creation

 def create
    @proposal = Proposal.new(params[:proposal])

    if current_user
     @user = current_user

Small excerpt from app/views/telecommunications_proposal/_form.html.erb

 <% for user in User.find(:all) %>  
    <div>  
      <%= check_box_tag "proposal[users][]",user%>  
      <%= user.trading_name %>  
    </div>  
<% end %> 

Can someone please show me where I am going wrong?

Answer 1

Looks like you should be passing the id of the user to check_box_tag, not the record itself, and use user_ids in the name of the checkboxes rather than users:

<%= check_box_tag "proposal[user_ids][]", user.id %>

Refs:

• HABTM Checkboxes
• Methods Added by has_many