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

The way that i always do this is to make a new action update_multiple. This expects params with the following structure (using your Family example, and updating two records, with ids 123 and 456)

params = {:families => {123 => {:name => "foo", :address => "bar"}, 456 => {:name => "baz", :address => "qux"} }}

and the action works like so:

@families = []
params[:families].each do |id, attributes|
  if family = Family.find_by_id(id)
    family.update_attributes(attributes)
    @families << family
  end
end

In order to set up the params with the required structure, your form would be set up like so:

<% @families.each do |family| %>
  

    Name: <%= text_field_tag "families[#{family_id}][name]", family.name %>
    Address: <%= text_field_tag "families[#{family_id}][address]", family.address %>
  
<% end %>

You could, instead of making a new action, change the structure of your update action to do the standard code if it gets params[:family] and the above code if it gets params[:families].