adding nested fields dynamically with parent.send(association).build instead of reflect_on_association(association).klass.new
I'm using simple_form's fields_for and add fields dynamically with the link_to_add_fields method proposed by Ryan Bates (Railscast). The Problem I have is that f.object.class.reflect_on_association(association).klass.new , which is used to instantiate the model for the additional fields, creates a completely empty record (order_id is not being set), thus my delegated method results in an error. If
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Rails: ActiveRecord and send; how do I set an activerecord instance's relation with only knowing the class names?