6f29d12386
The inheritance model has changed, we no longer need to store an array of `types` with the model we can just use the classname in `_cls`. See the upgrade docs for information on how to upgrade MongoEngine/mongoengine#148
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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import unittest
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from mongoengine import Document, connect
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from mongoengine.connection import get_db
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from mongoengine.fields import StringField
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__all__ = ('TurnOffInheritanceTest', )
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class TurnOffInheritanceTest(unittest.TestCase):
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def setUp(self):
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connect(db='mongoenginetest')
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self.db = get_db()
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def tearDown(self):
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for collection in self.db.collection_names():
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if 'system.' in collection:
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continue
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self.db.drop_collection(collection)
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def test_how_to_turn_off_inheritance(self):
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"""Demonstrates migrating from allow_inheritance = True to False.
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"""
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# 1. Old declaration of the class
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class Animal(Document):
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name = StringField()
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meta = {
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'allow_inheritance': True,
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'indexes': ['name']
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}
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# 2. Turn off inheritance
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class Animal(Document):
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name = StringField()
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meta = {
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'allow_inheritance': False,
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'indexes': ['name']
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}
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# 3. Remove _types and _cls
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collection = Animal._get_collection()
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collection.update({}, {"$unset": {"_types": 1, "_cls": 1}}, multi=True)
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# 3. Confirm extra data is removed
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count = collection.find({"$or": [{'_types': {"$exists": True}},
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{'_cls': {"$exists": True}}]}).count()
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assert count == 0
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# 4. Remove indexes
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info = collection.index_information()
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indexes_to_drop = [key for key, value in info.iteritems()
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if '_types' in dict(value['key'])
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or '_cls' in dict(value['key'])]
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for index in indexes_to_drop:
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collection.drop_index(index)
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# 5. Recreate indexes
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Animal.objects._ensure_indexes()
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