Support encoder and decoder in jsonfield.

Author: WaVEV

django_mongodb/base.py

@@ -140,7 +140,6 @@ def _connect(self):
         self.connection = MongoClient(
             host=settings_dict["HOST"] or None,
             port=int(settings_dict["PORT"] or 27017),
-            uuidRepresentation="standard",
             **options,
         )
         db_name = settings_dict["NAME"]

django_mongodb/features.py

@@ -46,7 +46,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         "lookup.tests.LookupTests.test_pattern_lookups_with_substr",
         # Querying ObjectID with string doesn't work.
         "lookup.tests.LookupTests.test_lookup_int_as_str",
-        "model_fields.test_jsonfield.TestQuerying.test_icontains"
+        "model_fields.test_jsonfield.TestQuerying.test_icontains",
         # MongoDB gives the wrong result of log(number, base) when base is a
         # fractional Decimal: https://jira.mongodb.org/browse/SERVER-91223
         "db_functions.math.test_log.LogTests.test_decimal",
@@ -359,10 +359,6 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             "db_functions.comparison.test_cast.CastTests.test_cast_from_python_to_datetime",
             "db_functions.comparison.test_cast.CastTests.test_cast_to_duration",
         },
-        "Mongodb support uuid as a type in json fields.": {
-            "model_fields.test_jsonfield.JSONFieldTests.test_invalid_value",
-            "model_fields.test_jsonfield.JSONFieldTests.test_db_check_constraints",
-        },
         "Mongodb's Null behaviour is different from sql's": {
             "model_fields.test_jsonfield.TestQuerying.test_expression_wrapper_key_transform",
             "model_fields.test_jsonfield.TestSaveLoad.test_json_null_different_from_sql_null",

django_mongodb/fields/json_field.py

@@ -1,3 +1,5 @@
+import json
+
 from django.db import NotSupportedError
 from django.db.models import JSONField
 from django.db.models.fields.json import (
@@ -31,13 +33,13 @@ def data_contains(self, compiler, connection):  # noqa: ARG001
 
 def from_db_value(self, value, expression, connection):
     """
-    MongoDB does not need to change the json value. It is stored as it is.
+    Transforms the value retrieved from the database into a string if the database
+    vendor is MongoDB. This is necessary because MongoDB saves the data as a
+    dictionary, and converting it to a JSON string allows for proper decoding.
     """
-    return (
-        value
-        if connection.vendor == "mongodb"
-        else _from_db_value(self, value, expression, connection)
-    )
+    if connection.vendor == "mongodb":
+        value = json.dumps(value)
+    return _from_db_value(self, value, expression, connection)
 
 
 def has_key_lookup(self, compiler, connection):
@@ -62,7 +64,7 @@ def has_key_lookup(self, compiler, connection):
     return {self.mongo_operator: keys}
 
 
-__process_rhs = JSONExact.process_rhs
+_process_rhs = JSONExact.process_rhs
 
 
 def json_process_rhs(self, compiler, connection):
@@ -73,7 +75,7 @@ def json_process_rhs(self, compiler, connection):
     return (
         super(JSONExact, self).process_rhs(compiler, connection)
         if connection.vendor == "mongodb"
-        else __process_rhs(self, compiler, connection)
+        else _process_rhs(self, compiler, connection)
     )
 
 

django_mongodb/operations.py

@@ -1,8 +1,10 @@
 import datetime
+import json
 import uuid
 
 from bson.decimal128 import Decimal128
 from django.conf import settings
+from django.db import DataError
 from django.db.backends.base.operations import BaseDatabaseOperations
 from django.utils import timezone
 from django.utils.regex_helper import _lazy_re_compile
@@ -37,7 +39,10 @@ def adapt_decimalfield_value(self, value, max_digits=None, decimal_places=None):
         return Decimal128(value)
 
     def adapt_json_value(self, value, encoder):
-        return value
+        try:
+            return json.loads(json.dumps(value, cls=encoder))
+        except json.decoder.JSONDecodeError as e:
+            raise DataError from e
 
     def adapt_timefield_value(self, value):
         """Store TimeField as datetime."""