Question

have some custom attr_accessor in my model.

When I try to create a new model using the params[:model] I’m getting this error:

ActiveModel::MassAssignmentSecurity::Error (Can't mass-assign protected attributes: entity_select, office_select):

class Expedient < ActiveRecord::Base

  belongs_to :enterprise
  has_many :document

  attr_accessor :entity_select
  attr_accessor :office_select

...

I suppose Rails know that those are att_accessor and should not be saved on the model in the database.

Or not ?

I’m using this attr_accessor for creating some help field using simple_form:

<%= f.input :entity_select,:label => 'Entity', :input_html => {:class => "span2"}, :wrapper => :prepend do %>
  <span class="add-on"><i class="icon-search"></i></span><%= f.input_field :entity_select, :class => "span2 typeahead_entity", :id_selected => '99', :id => 'typeahead_centre'%>
<%end%>

I need a special text input for a typeahed, but I want to create this input using simple_form, like other ‘real’ fields, that’s why I’m using a ‘not real attribute’…

thanks,

EDIT:

The error is not when saving, just before, when assigning the params to the model attributes here:

    @expedient=Expedient.new.attributes=params[:expedient]

Answer 1

Make the entity_select and office_select attributes accessible:

class Expedient < ActiveRecord::Base
  # Add:
  attr_accessible :entity_select, :office_select