Ruby on Rails - Nested Attributes, adding unwanted fields after saving

Question

My nested attribute form is adding unwanted fields automatically each time I save my regular form.

How do I prevent from adding an extra field after saving?

registrations_controller.rb controller

def edit
  @user = User.find(current_user.id)
  @profile = Profile.new
  @user.businesses.build
end

business.rb model

class Business < ActiveRecord::Base
  belongs_to :users
end

user.rb model

class User < ActiveRecord::Base
  has_many :businesses
end

view page

<%= form_for @user, :html => {:multipart => true} do |f| %>
  <%= f.fields_for :businesses do |builders| %>
    <%= builders.text_field :name %>
  <% end %>

  <%= f.submit "Save" %>
<% end %>

At first it shows a single empty field, and then when I press save, it adds another one, even though if its blank or not. I just want to keep one field for now and not automatically add another one.

Oleg Haidul · Accepted Answer · 2013-09-20 06:13:23Z

1

Try:

class User < ActiveRecord::Base
  has_many :businesses
  accepts_nested_attributes_for :businesses, allow_destroy: true, reject_if: lambda { |b| b[:name].blank? }
end

UPDATE:

@user.businesses.build if @user.businesses.empty?

edited Sep 20, 2013 at 6:13

answered Sep 20, 2013 at 5:51

Oleg Haidul

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4 Comments

hellomello Over a year ago

it still adds an extra field when saving record

Oleg Haidul Over a year ago

It should reject businesses with empty name. Updated.

hellomello Over a year ago

Oh its almost there! But why is it that if I have a value saved in the field, I can't save an empty field anymore if I decide to leave the field empty, after saving it?

Oleg Haidul Over a year ago

If u want to add another field - use link_to_add and link_to_remove helper methods on the form builder. And remove reject_if if u want to save empty values in new fields.

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