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django-deep-serializer-0.1.3
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مشاهده بیشترتوضیحات
Serialize/Deserialize an object and its relations through class definitions
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | django-deep-serializer-0.1.3 |
| نام | django-deep-serializer |
| نسخه کتابخانه | 0.1.3 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Pablo Martin |
| ایمیل نویسنده | goinnn@gmail.com |
| آدرس صفحه اصلی | https://github.com/goinnn/django-deep-serializer |
| آدرس اینترنتی | https://pypi.org/project/django-deep-serializer/ |
| مجوز | LGPL 3 |
.. contents::
======================
django-deep-serializer
======================
.. image:: https://travis-ci.org/goinnn/django-deep-serializer.png?branch=master
:target: https://travis-ci.org/goinnn/django-deep-serializer
.. image:: https://coveralls.io/repos/goinnn/django-deep-serializer/badge.png?branch=master
:target: https://coveralls.io/r/goinnn/django-deep-serializer
.. image:: https://badge.fury.io/py/django-deep-serializer.png
:target: https://badge.fury.io/py/django-deep-serializer
.. image:: https://pypip.in/d/django-deep-serializer/badge.png
:target: https://pypi.python.org/pypi/django-deep-serializer
With django-deep-serializer you can serialize/deserialize an object and its relations through class definitions
Requeriments
============
* `django <http://pypi.python.org/pypi/django/>`_ (>=1.4, it's possible that works with previous versions)
* `PyYAML <https://pypi.python.org/pypi/PyYAML>`_ (>=3.10, optional only if you want use this serializer)
* `django-form-admin <https://pypi.python.org/pypi/django-form-admin>`_ (>=0.4.2, optional only to the example project)
Installation
============
If you want use natural keys, you have use the `internal serializers <https://github.com/goinnn/django-deep-serializer/commit/35190702bbd00324a1bb526a2aa842405e241bd3>`_ These are got from django git repository. These are not in the any stable branch or release. You have to write in your settings:
::
SERIALIZATION_MODULES = {
"xml" : "deep_serializer.serializers.xml_serializer",
"python" : "deep_serializer.serializers.python",
"json" : "deep_serializer.serializers.json",
#"yaml" : "deep_serializer.serializers.pyyaml",
}
Use cases
=========
* Serialize (using primary keys or natural keys) an object and its relations. Sometimes django can not serialize an app. E.g. if you try to serialize the "example.app" application in the example project you will get the next error: "CommandError: Unable to serialize database: Can't resolve dependencies for app.Page, app.WebSite in serialized app list."
* Deserialize (using primary keys or natural keys) some objects
* Clone (using natural keys) an object. To do you can serialize, update the natural key to the main object and after deserialize these objects
* Restore an object with its relations, (using primary keys or natural keys)
How to use
==========
The idea is get to have a serializer or/and a deserializer implemented with very few lines. These have to be able to define some "rules".
There are five examples (five distinct use case) in the `example project <https://github.com/goinnn/django-deep-serializer/blob/master/example/example/app/serializer.py>`_. E.g.:
::
class WebSiteClone(MyMetaWalkClass):
@classmethod
def pre_serialize(cls, initial_obj, obj, request, serialize_options=None):
obj = super(WebSiteClone, cls).pre_serialize(initial_obj, obj,
request,
serialize_options=serialize_options)
new_title = '%s-%s' % (obj.title, time.time())
obj.title = new_title[:200]
obj.slug = get_hash()
obj.original_website_id = obj.pk
obj.initial_page = None
return obj
@classmethod
def walking_into_class(cls, initial_obj, obj, field_name, model, request=None):
if field_name in ('initial_page', 'websites_created_of'):
return WALKING_STOP
elif field_name in ('original_website', 'owners'):
return ONLY_REFERENCE
elif field_name == 'page':
return WALKING_INTO_CLASS
update_the_serializer(obj, field_name)
class PageClone(MyMetaWalkClass):
@classmethod
def pre_serialize(cls, initial_obj, obj, request, serialize_options=None):
obj = super(PageClone, cls).pre_serialize(initial_obj,
obj, request,
serialize_options=serialize_options)
obj.website = initial_obj
obj.created_from_id = obj.pk
return obj
@classmethod
def walking_into_class(cls, initial_obj, obj, field_name, model, request=None):
if field_name in ('pages_created_of', 'website', 'website_initial_page'):
return WALKING_STOP
elif field_name in ('created_from', 'last_editor'):
return ONLY_REFERENCE
update_the_serializer(obj, field_name)
@classmethod
def post_save(cls, initial_obj, obj, request=None):
super(PageClone, cls).post_save(initial_obj, obj, request=request)
initial_page = obj.created_from.website.initial_page
if initial_page and obj.slug == initial_page.slug:
obj.website.initial_page = obj
obj.website.save()
def clone_website(website, format='python'):
walking_classes = {WebSite: WebSiteClone,
Page: PageClone,
User: BaseMetaWalkClass}
natural_keys = True
fixtures = serializer(format, website,
walking_classes=walking_classes,
natural_keys=natural_keys)
return deserializer(format, fixtures,
initial_obj=website,
walking_classes=walking_classes,
natural_keys=natural_keys)
You can see a real example in `moocng project <https://github.com/OpenMOOC/moocng/blob/feature-clone-course/moocng/courses/serializer.py>`_
Development
===========
You can get the last bleeding edge version of django-deep-serializer by doing a clone
of its git repository::
git clone https://github.com/goinnn/django-deep-serializer
Test project
============
In the source tree, you will find a directory called 'example'. It contains
a readily setup project that uses django-deep-serializer. You can run it as usual:
::
python manage.py syncdb --noinput
python manage.py loaddata app_data.json
python manage.py runserver
Releases
========
0.1.3 (2014-10-13)
-------------------
* Support to Django 1.7
0.1.2 (2013-11-14)
------------------
* Little details
0.1.1 (2013-11-13)
------------------
* Add tests to django 1.6
* Update the django 1.5 version, from 1.5.4 to 1.5.5
0.1.0 (2013-11-05)
------------------
* Fix a bug when you deserializer and the format to the fixtures was XML
* Add message when raise exceptions
* Improvements in the serialization form in the example project
* Fix a little error when you serialized and the format was python
* Reorder and refactor the code. **There are backward incompatible changes** like reorder of the params of the methods
* Improvements in the tests
0.0.1 (2013-10-29)
------------------
* Initial version
نحوه نصب
نصب پکیج whl django-deep-serializer-0.1.3:
pip install django-deep-serializer-0.1.3.whl
نصب پکیج tar.gz django-deep-serializer-0.1.3:
pip install django-deep-serializer-0.1.3.tar.gz