INTPYTHON-348 Add support for QuerySet.raw()

- Partial fix for datefield converter bug

Author: aclark4life

django_mongodb/compiler.py

@@ -639,6 +639,20 @@ def explain_query(self):
             result.append(f"{key}: {formatted_value}")
         return result
 
+    def apply_converters(self, rows, converters):
+        connection = self.connection
+        converters = list(converters.items())
+        for row in rows:
+            for pos, (convs, expression) in converters:
+                try:
+                    value = list(row.values())[pos]
+                except AttributeError:
+                    value = row[pos]
+                for converter in convs:
+                    value = converter(value, expression, connection)
+                row[pos] = value
+            yield row
+
 
 class SQLInsertCompiler(SQLCompiler):
     def execute_sql(self, returning_fields=None):