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authorRaphaël Barrois <raphael.barrois@polytechnique.org>2013-02-10 14:02:55 +0100
committerRaphaël Barrois <raphael.barrois@polytechnique.org>2013-02-10 14:02:55 +0100
commita10b58cd7897af617ce0926c2c08427f135db574 (patch)
tree6629fa80af79be118ae6491a58e7c2cb9e8fc79e /README
parent8c3c45e441e589a4ede80bb8532803a382624332 (diff)
downloadfactory-boy-a10b58cd7897af617ce0926c2c08427f135db574.tar
factory-boy-a10b58cd7897af617ce0926c2c08427f135db574.tar.gz
Improve README.
Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>
Diffstat (limited to 'README')
-rw-r--r--README46
1 files changed, 32 insertions, 14 deletions
diff --git a/README b/README
index e25f788..82bdafc 100644
--- a/README
+++ b/README
@@ -22,6 +22,7 @@ factory_boy supports Python 2.6 and 2.7 (Python 3 is in the works), and requires
Download
--------
+PyPI: http://pypi.python.org/pypi/factory_boy/
Github: http://github.com/rbarrois/factory_boy/
PyPI:
@@ -46,10 +47,10 @@ Factories declare a set of attributes used to instantiate an object. The class o
.. code-block:: python
import factory
- from models import User
+ from . import models
class UserFactory(factory.Factory):
- FACTORY_FOR = User
+ FACTORY_FOR = models.User
first_name = 'John'
last_name = 'Doe'
@@ -57,7 +58,7 @@ Factories declare a set of attributes used to instantiate an object. The class o
# Another, different, factory for the same object
class AdminFactory(factory.Factory):
- FACTORY_FOR = User
+ FACTORY_FOR = models.User
first_name = 'Admin'
last_name = 'User'
@@ -107,6 +108,7 @@ Most factory attributes can be added using static values that are evaluated when
.. code-block:: 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())
@@ -139,9 +141,8 @@ Associated instances can also be generated using ``SubFactory``:
.. code-block:: python
- from models import Post
-
class PostFactory(factory.Factory):
+ FACTORY_FOR = models.Post
author = factory.SubFactory(UserFactory)
@@ -151,14 +152,18 @@ The associated object's strategy will be used:
.. code-block:: python
# Builds and saves a User and a Post
- post = PostFactory()
- post.id == None # => False
- post.author.id == None # => False
+ >>> post = PostFactory()
+ >>> post.id is None # Post has been 'saved'
+ False
+ >>> post.author.id is None # post.author has been saved
+ False
# Builds but does not save a User, and then builds but does not save a Post
- post = PostFactory.build()
- post.id == None # => True
- post.author.id == None # => True
+ >>> post = PostFactory.build()
+ >>> post.id is None
+ True
+ >>> post.author.id is None
+ True
Inheritance
@@ -169,9 +174,11 @@ You can easily create multiple factories for the same class without repeating co
.. code-block:: python
class PostFactory(factory.Factory):
+ FACTORY_FOR = models.Post
title = 'A title'
class ApprovedPost(PostFactory):
+ # No need to replicate the FACTORY_FOR attribute
approved = True
approver = factory.SubFactory(UserFactory)
@@ -184,31 +191,39 @@ Unique values in a specific format (for example, e-mail addresses) can be genera
.. code-block:: python
class UserFactory(factory.Factory):
+ FACTORY_FOR = models.User
email = factory.Sequence(lambda n: 'person{0}@example.com'.format(n))
- UserFactory().email # => 'person0@example.com'
- UserFactory().email # => 'person1@example.com'
+ >>> UserFactory().email
+ 'person0@example.com'
+ >>> UserFactory().email
+ 'person1@example.com'
Sequences can be combined with lazy attributes:
.. code-block:: python
class UserFactory(factory.Factory):
+ FACTORY_FOR = models.User
+
name = 'Mark'
email = factory.LazyAttributeSequence(lambda a, n: '{0}+{1}@example.com'.format(a.name, n).lower())
- UserFactory().email # => mark+0@example.com
+ >>> UserFactory().email
+ 'mark+0@example.com'
If you wish to use a custom method to set the initial ID for a sequence, you can override the ``_setup_next_sequence`` class method:
.. code-block:: python
class MyFactory(factory.Factory):
+ FACTORY_FOR = MyClass
@classmethod
def _setup_next_sequence(cls):
return cls.FACTORY_FOR.objects.values_list('id').order_by('-id')[0] + 1
+
Customizing creation
--------------------
@@ -231,6 +246,7 @@ Factory._prepare method:
.. OHAI VIM**
+
Subfactories
------------
@@ -240,10 +256,12 @@ the global factory, using a simple syntax : ``field__attr=42`` will set the attr
.. code-block:: python
class InnerFactory(factory.Factory):
+ FACTORY_FOR = InnerClass
foo = 'foo'
bar = factory.LazyAttribute(lambda o: foo * 2)
class ExternalFactory(factory.Factory):
+ FACTORY_FOR = OuterClass
inner = factory.SubFactory(InnerFactory, foo='bar')
>>> e = ExternalFactory()