Fix float converter.

Author: WaVEV

django_mongodb/compiler.py

@@ -324,7 +324,7 @@ def build_query(self, columns=None):
         query.project_fields = self.get_project_fields(columns, ordering=query.ordering)
         try:
             where = getattr(self, "where", self.query.where)
-            query.mongo_query = {"$expr": where.as_mql(self, self.connection)} if where else None
+            query.mongo_query = {"$expr": where.as_mql(self, self.connection)}
         except FullResultSet:
             query.mongo_query = {}
         return query

django_mongodb/operations.py

@@ -82,9 +82,11 @@ def get_db_converters(self, expression):
         elif internal_type == "DateTimeField":
             if settings.USE_TZ:
                 converters.append(self.convert_datetimefield_value)
-        elif internal_type in ("DecimalField", "FloatField") or internal_type.endswith(
-            "IntegerField"
-        ):
+        elif internal_type == "FloatField":
+            converters.append(self.convert_floatfield_value)
+        elif internal_type.endswith("IntegerField"):
+            converters.append(self.convert_integerfield_value)
+        elif internal_type == "DecimalField":
             converters.append(self.convert_decimalfield_value)
         elif internal_type == "JSONField":
             converters.append(self.convert_jsonfield_value)
@@ -126,6 +128,12 @@ def convert_durationfield_value(self, value, expression, connection):
                 value = datetime.timedelta(milliseconds=int(str(value)))
         return value
 
+    def convert_floatfield_value(self, value, expression, connection):
+        return None if value is None else float(value)
+
+    def convert_integerfield_value(self, value, expression, connection):
+        return None if value is None else float(value)
+
     def convert_jsonfield_value(self, value, expression, connection):
         """
         Convert dict data to a string so that JSONField.from_db_value() can