Ecto.Associations.BelongsTo.Proxy

A belongs_to association.

Create

A new struct of the associated model can be created with struct/2.

defmodule Comment do
  use Ecto.Model

  schema "comments" do
    belongs_to :post, Post
  end
end

comment = %Comment{} 
struct(comment.post, []) #=> %Post{}

Reflection

Any association module will generate the __assoc__ function that can be used for runtime introspection of the association.

• __assoc__(:loaded, assoc) - Returns the loaded entities or :not_loaded;
• __assoc__(:loaded, value, assoc) - Sets the loaded entities;

• __assoc__(:target, assoc) - Returns the model where the association was

  defined;

• __assoc__(:name, assoc) - Returns the name of the association field on the

  model;

• __assoc__(:new, name, target) - Creates a new association with the given

  name and target;