Saving multiple records with a single form in Rails 4

Question

I have a model called Family, which belongs_to User I want to enable the user to add multiple family members in a single form, which is in

Answer 1

You want to use nested forms. You should be able to copy and paste the following code to get going:

app/models/family.rb

class Family < ActiveRecord::Base
  has_many :users

  accepts_nested_attributes_for :users
end

app/models/user.rb

class User < ActiveRecord::Base
  belongs_to :family
end

app/views/families/new.html.erb

<%= form_for(@family) do |f| %>
  <%= f.fields_for :users do |user| %>
    

    <%= user.text_field :name %>

    <%= user.text_field :email %>
    
  <% end %>

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

app/controllers/families_controller.rb

  [...]

  def new
    @family = Family.new
    3.times { @family.users.build }
  end

  [...]

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_family
      @family = Family.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def family_params
      params.require(:family).permit(:name, users_attributes: [ :name, :email ])
    end