Added json serialisation support

- Added to_json and from_json to Document (MongoEngine/mongoengine#1)
- Added to_json and from_json to QuerySet (MongoEngine/mongoengine#131)

tests/document/__init__.py

@@ -1,4 +1,6 @@
-# TODO EXPLICT IMPORTS
+import sys
+sys.path[0:0] = [""]
+import unittest
 
 from class_methods import *
 from delta import *
@@ -6,6 +8,7 @@ from dynamic import *
 from indexes import *
 from inheritance import *
 from instance import *
+from json_serialisation import *
 
 if __name__ == '__main__':
     unittest.main()

tests/document/instance.py

@@ -346,7 +346,7 @@ class InstanceTest(unittest.TestCase):
             meta = {'shard_key': ('superphylum',)}
 
         Animal.drop_collection()
-        doc = Animal(superphylum = 'Deuterostomia')
+        doc = Animal(superphylum='Deuterostomia')
         doc.save()
         doc.reload()
         Animal.drop_collection()

tests/document/json_serialisation.py

@@ -0,0 +1,81 @@
+import sys
+sys.path[0:0] = [""]
+
+import unittest
+import uuid
+
+from nose.plugins.skip import SkipTest
+from datetime import datetime
+from bson import ObjectId
+
+import pymongo
+
+from mongoengine import *
+
+__all__ = ("TestJson",)
+
+
+class TestJson(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+
+    def test_json_simple(self):
+
+        class Embedded(EmbeddedDocument):
+            string = StringField()
+
+        class Doc(Document):
+            string = StringField()
+            embedded_field = EmbeddedDocumentField(Embedded)
+
+        doc = Doc(string="Hi", embedded_field=Embedded(string="Hi"))
+
+        self.assertEqual(doc, Doc.from_json(doc.to_json()))
+
+    def test_json_complex(self):
+
+        if pymongo.version_tuple[0] <= 2 and pymongo.version_tuple[1] <= 3:
+            raise SkipTest("Need pymongo 2.4 as has a fix for DBRefs")
+
+        class EmbeddedDoc(EmbeddedDocument):
+            pass
+
+        class Simple(Document):
+            pass
+
+        class Doc(Document):
+            string_field = StringField(default='1')
+            int_field = IntField(default=1)
+            float_field = FloatField(default=1.1)
+            boolean_field = BooleanField(default=True)
+            datetime_field = DateTimeField(default=datetime.now)
+            embedded_document_field = EmbeddedDocumentField(EmbeddedDoc,
+                                        default=lambda: EmbeddedDoc())
+            list_field = ListField(default=lambda: [1, 2, 3])
+            dict_field = DictField(default=lambda: {"hello": "world"})
+            objectid_field = ObjectIdField(default=ObjectId)
+            reference_field = ReferenceField(Simple, default=lambda:
+                                                        Simple().save())
+            map_field = MapField(IntField(), default=lambda: {"simple": 1})
+            decimal_field = DecimalField(default=1.0)
+            complex_datetime_field = ComplexDateTimeField(default=datetime.now)
+            url_field = URLField(default="http://mongoengine.org")
+            dynamic_field = DynamicField(default=1)
+            generic_reference_field = GenericReferenceField(
+                                            default=lambda: Simple().save())
+            sorted_list_field = SortedListField(IntField(),
+                                                default=lambda: [1, 2, 3])
+            email_field = EmailField(default="ross@example.com")
+            geo_point_field = GeoPointField(default=lambda: [1, 2])
+            sequence_field = SequenceField()
+            uuid_field = UUIDField(default=uuid.uuid4)
+            generic_embedded_document_field = GenericEmbeddedDocumentField(
+                                        default=lambda: EmbeddedDoc())
+
+        doc = Doc()
+        self.assertEqual(doc, Doc.from_json(doc.to_json()))
+
+
+if __name__ == '__main__':
+    unittest.main()