Symfony2/Doctrine2 relation same object twice

Question

I have a problem with doctrine entity mapping. Have a basic user entity and I want to create a Friend entity, what made up from two foreign key to the user table, the first owner of the friendship and the other. I tried to do it in this way ( yaml ), the entities are generated the correct way, but when I create the DB with doctrine scheme update, it has a totally different result.

The user entity:

..\..\Entity\User:
type:  entity
uniqueConstraints:
    usernameCanonical:
        columns: usernameCanonical
    emailCanonical:
        columns: emailCanonical
oneToMany:
    owners:
        targetEntity: Friend
        mappedBy: owner
    friends:
        targetEntity: Friend
        mappedBy: friend

And the friend entity:

..\..\Entity\Friend:
type: entity
table: friend
lifecycleCallbacks:
    prePersist: [setCreated, setModified]
    preUpdate: [setModified]
manyToOne:
    owner:
        targetEntity: User
        inversedBy: friends
        joinColumn:
            name: user
            referencedColumnName: id
            onDelete: cascade
    friend:
        targetEntity: User
        inversedBy: owners
        joinColumn:
            name: user
            referencedColumnName: id
            onDelete: cascade

This should create two foreign to from friend to user, but instead it's create one like:

ALTER TABLE friend ADD CONSTRAINT FK_55EEAC618D93D649 FOREIGN KEY (user) REFERENCES users (id) ON DELETE CASCADEe

Answer 1

Common "Friends" relationship is ManyToMany SelfReferencing doctrine relationship and it's used as an example in the doctrine documentation