What are the entities namespaces and alias in Doctrine2?

In the documentation I saw this method:

addEntityNamespace($alias, $namespace);

B开发者_运维技巧ut I can't find anywhere what is it about.

Any ideas?

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Entity namespaces are a shortcut to aliasing Entities when pointing to other classes. A good example of an entity namespace is inside DQL queries.

When you define a namespace, like: ->addEntityNamespace('app', 'Application\Entity'); You can then refer to them easily. In a DQL sample, instead of write this:

SELECT u FROM Application\Entity\User u

You can do that:

SELECT u FROM app:User u

I hope this helps. =)

Cheers,