Create Multiple records with fields_for - Rails

Question

I have two models, task and list_items. a task has_many list_items. But I want to be able to be able to create task

Answer 1

undefined method `description' for []:Array

To describe the reason for the error, fields_for accepts record_object as a second parameter which fields_for uses it to construct the fields. Here you are passing @all_list_items which is an array and that results in the error.

Solution to the error:

You should pass @list_item instead of @all_list_items

<%= fields_for :list_items, @list_item do |list_item_form| %>

Solution to the actual problem:

As you want to create multiple list_items, you should do

def new
  @task = @assignment.tasks.new
  x.times do
    @list_item = @task.list_items.build
  end
  @all_list_items = []
end

where x is how many list_items you want to create, for example if you want to create three list_items, then replace x with 3.

OR

Use cocoon gem to dynamically create nested forms.