CODEWITHSUNDEEP
ruby-on-rails-3nested-attributessimple-formmass-assignment
user788581
user788581

Reputation:

Mass Assignment Error simple_form nested attributes

I really can't figure this one out. I've read a lot of similar problems regarding the mass assignment error but every solution I've tried has failed.

I'm trying to nest my institution model into my course model using accepts_nested_attributes_for & simple_form. My code is as follows:

Course Model:

  # Attributes 
  attr_accessible :class_end, :class_start, :cost, :effort, :level, :name, :overview, :prerequisites, :tags, :tag_list

  # Associations 
  belongs_to :institution 
  accepts_nested_attributes_for :institution

Institution Model:

# Attributes
attr_accessible :bio, :city, :country, :name, :state, :twitter_url, :type, :url, :image_url, :email

 # Associations
 has_many :courses

View of nested simple_form:

<%= simple_form_for(@course) do |f| %>
  <%= f.simple_fields_for :institutions do |i| %>
    <%= i.input :name %>            
    <%= f.input :name %>
    <%= f.input :overview %>
    <%= f.input :cost %> 
    <%= f.input :level %>
    <%= f.input :tag_list %> 
    <%= f.input :class_start %>
    <%= f.input :class_end %>
    <%= f.input :effort %>
    <%= f.input :prerequisites %>

    <%= f.button :submit %>
  <% end %>
<% end %>

The error I'm getting: 

Can't mass-assign protected attributes: institutions

{"utf8"=>"✓",
 "authenticity_token"=>"GRoBHYhpv3QyzvH2UHBaJQ/62+9QIDKIwp/VLiLMjus=",
 "course"=>{"institutions"=>{"name"=>"asdfa"},
 "name"=>"sdaf",
 "overview"=>"asdf",
 "cost"=>"Free",
 "level"=>"Beginner",
 "tag_list"=>"asdf",
 "class_start(1i)"=>"2012",
 "class_start(2i)"=>"9",
 "class_start(3i)"=>"18",
 "class_end(1i)"=>"2012",
 "class_end(2i)"=>"9",
 "class_end(3i)"=>"18",
 "effort"=>"asdf",
 "prerequisites"=>"asdf"},
 "commit"=>"Create Course"}

Upvotes: 1

Views: 848

Answers (2)

FWorley
FWorley

Reputation: 1

Have you 'built' the institution in your controller?

try including: 

@course.build_institution

In your CoursesController

Upvotes: 0

iouri
iouri

Reputation: 2929

You need to add institution_attributes to attr_accessible of the Course and use proper name for fields_for, I think it should be :institution, not :institutions. Form should look like this:

<%= simple_form_for(@course) do |f| %>
  <%= f.simple_fields_for :institution do |i| %>
    <%= i.input :name %>            
  <% end %>
  <%= f.input :name %>
  <%= f.input :overview %>
  <%= f.input :cost %> 
  <%= f.input :level %>
  <%= f.input :tag_list %> 
  <%= f.input :class_start %>
  <%= f.input :class_end %>
  <%= f.input :effort %>
  <%= f.input :prerequisites %>

  <%= f.button :submit %>
<% end %>

Upvotes: 2

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