Below is an example of how to produce a form for an embeds_many association for mongoid and simple_form (although this will also work with the standard rails helpers).
Class User
include Mongoid::Document
embeds_many :children, :class_name => "Child"
accepts_nested_attributes_for :children, reject_if: proc { |attributes| attributes["age"].blank? }
end
Class Children
include Mongoid::Document
field :age, type: String
embedded_in :user
validates_presence_of :age
end
And on the view side then we can simply use simple_fields_for now as it is a now a nested attribute:
= f.simple_fields_for :children do |child_form| = child_form.input :age
You can now have as many children as you want and the form will pass the correct params back.
