creating multiple objects of the same model in a single form

Question

I want to create multiple instances of the same object in one form. I have tried

<%= form_tag(animals_path) do %>
 <% @animals.each do |animal| %>
  <%= fields_for "animals[]",animal do |f| %>
   `//animal fields
 <% end %>
<%= submit_tag 'save' %>`

but got error: "undefined method `merge!' for nil:NilClass"

I have built @animals at my controller like this

@animals = []
 3.times do |t|
 @animals << Animal.new
end

using rails 3.0.7

any help is appreciated.

You want to use nested attributes. For nested attributes there must be a parent model. But in your case you use form_tag . so when it tries to merge child attributes to parent model, it didn't find any parent model so the error is produced. — Pardeep Saini
– Pardeep Saini, Commented Oct 21, 2015 at 10:09
for more details check this api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/… — Pardeep Saini
– Pardeep Saini, Commented Oct 21, 2015 at 10:11
I can't do it in nested attributes, because i have no parent model. do you have any idea how to do it without nested attributes? — gyohannes
– gyohannes, Commented Oct 21, 2015 at 10:15

Community · Accepted Answer · 2017-05-23 12:24:35Z

1

I think this is not possible with nested form you can use your own trick to do this. There is some questions on stack overflow like this How to submit multiple, duplicate forms from same page in Rails - preferably with one button

edited May 23, 2017 at 12:24

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answered Oct 21, 2015 at 10:50

Pardeep Saini

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