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--- otros:factoryboy [2014/05/22 08:32]
alfred [Factories]
+++ otros:factoryboy [2020/05/09 09:25] (actual)
@@ Línea 40: / Línea 40: @@
 $ pip install factory_boy
 </code>
+==== ORMs ====
+=== MongoEngine ===
+<code python>
+from factory.mongoengine import MongoEngineFactory
+# ...
+class User(Document):
+# ...
+class UserFactory(MongoEngineFactory):
+</code>
 ===== First steps =====
 ==== Factories ====
-Factories declare a set of attributes for an object. The class of this object must be defined in the ''model'' attribute of a subclass ''Meta'':
+Factories declare a set of attributes for an object. The class of this object must be defined in the ''model'' attribute of a subclass ''Meta'' (:!: In previous versions the class ''Meta'' with its attribute ''model'' it is substituted by ''FACTORY_FOR'' attribute):
 <code python>
 import factory
@@ Línea 56: / Línea 64: @@
     admin = False
 </code>
-:!: In previous versions the class ''Meta'' with its attribute ''model'' it is substituted by ''FACTORY_FOR'' attribute.
+From here we can:
+<code python>
+# Build a not saved user
+user = UserFactory.build()
+# Build a saved user
+user = UserFactory.create()
+# Build a saved user
+user = UserFactory()
+# Returns a dict of attributes that can be used to build a user
+attributes = UserFactory.attributes()
+# Build a not saved user overriding its first_name
+user = UserFactory.build(first_name='Joe')
+# Build ten not saved users named Joe
+users = USerFactory.build(10, first_name="Joe")
+</code>
+=== Derived values ===
+We can create a field which is derived from others (this example will put ''joe.blow@example.com'' in email field):
+<code python>
+class UserFactory(factory.Factory):
+    FACTORY_FOR = models.User
+    first_name = 'Joe'
+    last_name = 'Blow'
+    email = factory.LazyAttribute(lambda a: '{0}.{1}@example.com'.format(a.first_name, a.last_name).lower())
+</code>
+=== Unique values in sequence ===
+We can create a field which is auto-incremented as:
+<code python>
+class UserFactory(factory.Factory):
+    FACTORY_FOR = models.User
+    email = factory.Sequence(lambda n: 'person{0}@example.com'.format(n))
+</code>
+=== Associate factories ===
+We can associate a field with other factory to create other sub instance:
+<code python>
+class PostFactory(factory.Factory):
+    FACTORY_FOR = models.Post
+    author = factory.SubFactory(UserFactory)
+</code>

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