How to implement many-to-many with extra fields in symfony2? [duplicate]

Question

I have "customers", "products" and "versions" tables.Each customer, can have more than one product, and each product has more than one version. I have created many-to-many relation "customers_products" and everything works perfect.

Also I have created one-to-many relation between "products" and "versions".

QUESTION: How to add an extra column (version_id) in "customers_products" table so I can build form where user can choose products and version to create new customer.

Answer 1

Once an association has data, it's no more an association.

You have to implement two ManyToOne instead of a ManyToMany.

See this great answer on this question for a full example.

You can get a lot of other examples by googling the title of your question.