nested attribute relationship never renders in form

rubyonrails-talk
1

Hey all,

I tried following this railscasts:

But there is one significant difference from what that does and what I am trying to do. That builds a relationship to one object. In my form, i have a list of objects and want to build relationship for each item in list.

class Rule < ActiveRecord::Base   has_many :notification_emails, :dependent => :destroy   accepts_nested_attributes_for :notification_emails, :reject_if => lambda { |notification| notification[:email].blank? } end

class NotificationEmail < ActiveRecord::Base   belongs_to :rule end

#home_controller

def rules_config       ...       @rules = rules.flatten       @rules.each { |a| a.notification_emails.build }

      render :partial => 'home/rules_config', :layout => false end

#home/rules_config.html.haml

#config   .form_content     = form_for "rule", '/home/save_rules/' + @unit.id.to_s, :remote => true, :class => 'ajaxCall' do |f|       %table.scrollTable{:cellspacing => "0", :width => "740px", :style => "border-collapse: collapse; border-spacing: 0;"}         %thead.fixedHeader           %tr             %th Rules             %th Enable             %th Email             %th Notification Emails         %tbody.scrollContent           - for rule in @rules             %tr               %td= rule.rule_code.name               %td= check_box_tag "enabled_ids", rule.id               %td= f.text_field :email, :value => rule.email, :index => rule.id               %td                 - f.fields_for :notification_emails do |notification|                   = notification.text_area :email, :rows => 1

Basically I have a list of rules that a user can edit and then update in this form. But each rule can have many notification emails and since I built an association in controller, I expect this cell to contain a text area field that links the relatonship. But the text area field never displays.

thanks for response

2

Depending on which Rails version you’re using, you might need to change:

  • f.fields_for :notification_emails do |notification|

to:

= f.fields_for :notification_emails do |notification|

(notice the = change)

Steve