Rails 3 submit a form with multiple records

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I would recommend using fields_for for this:

<%= form_for([@user, :reviews]) do |f| %>
  <% @reviews.each do |review| %>
    <%= fields_for review do |r| %>
      <%= render "reviews/form", :r => r %>
    <% end %>
  <% end %>
<% end %>

To make this work, you will need to build as many review objects as you require in your controller:

def new
  # you could also have this in a before_filter...
  @user = User.find(params[:id])
  @reviews = Array.new(3) { @user.reviews.build }
end

This would create new instances of review records for this user, which is different from new records. Instances are simply Ruby objects. Now because you’ve called @user.reviews.build three times, you’ll see three reviews in your view.

def create
  @user = User.find(params[:id])

  @reviews = Review.create(params[:reviews])
  # Some more logic for validating the parameters passed in
end

This will create three new Review objects and link them to @user, assuming all three are valid.

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