Rails 3 - checkbox for create (opposite of _destroy)
ruby-on-rails-3
Solution
By default the value of the check_box form helper is to set the checked_value to '1' and the unchecked_value to '0'. So to reverse the behaviour of the destroy checkbox, just switch these values around.
<%= builder.check_box :_destroy, {}, '0', '1' %>
Problem
I have a Query model with a has_many relationship to OutputFields. In my query controller's new function I build several OutputFields within the query instance. In my form, I want each checkbox to determine whether the object is saved (a check means save this instance of OutputField to the database). How can I do this? my models: ``` class Query < ActiveRecord::Base attr_accessible :description, :name has_many :output_fields, :dependent => :destroy accepts_nested_attributes_for :output_fields end class OutputField < ActiveRecord::Base attr_accessible :query_id, :column_name, :table_name belongs_to :query end ``` relevant sections of my queries controller. Structure is another model. ``` # GET /queries/new # GET /queries/new.json def new @query = Query.new Structure.columns.each do |column| @query.output_fields.build( :table_name => Structure.table_name, :column_name => column.name ) end respond_to do |format| format.html # new.html.erb format.json { render :json => @query } end end ``` Finally, my view. Right now I'm linking the checkbox to the destroy attribute, which I think will do the exact opposite of what I want. ``` <%= form_for(@query) do |f| %> <%= f.fields_for :output_fields do |builder| %> <div class="field"> <%= builder.check_box :_destroy %> <%= builder.label :_destroy, builder.object.column_name %> </div> <% end %> <div class="actions"> <%= f.submit %> </div> <% end %> ``` If it's not obvious, I'm trying generate a user interface for a simple query builder. This is my first rails app, so any advice is appreciated.