Changes necessary for running on Django 3.2

linguo/managers.py

@@ -45,11 +45,12 @@ def get_fields_to_translatable_models(model):
     results = []
     from linguo.models import MultilingualModel  # to avoid circular import
 
-    for field_name in model._meta.get_all_field_names():
-        field_object, modelclass, direct, m2m = model._meta.get_field_by_name(field_name)
+    for field in model._meta.get_fields():
+        field_object = model._meta.get_field(field.name)
+        direct = hasattr(field_object, 'related_model')
         if direct and isinstance(field_object, RelatedField):
-            if issubclass(field_object.related.parent_model, MultilingualModel):
-                results.append((field_name, field_object.related.parent_model))
+            if issubclass(field_object.related_model, MultilingualModel):
+                results.append((field.name, field_object.related_model))
     return results
 
 
@@ -66,13 +67,14 @@ def __init__(self, *args, **kwargs):
                     ordering.append(rewrite_lookup_key(self.model, key))
                 self.query.add_ordering(*ordering)
 
-    def _filter_or_exclude(self, negate, *args, **kwargs):
+    def _filter_or_exclude(self, negate, args, kwargs):
+        kwargs_new = {}
         for key, val in kwargs.items():
             new_key = rewrite_lookup_key(self.model, key)
-            del kwargs[key]
-            kwargs[new_key] = val
+            kwargs_new[new_key] = val
+        kwargs = kwargs_new
 
-        return super(MultilingualQuerySet, self)._filter_or_exclude(negate, *args, **kwargs)
+        return super(MultilingualQuerySet, self)._filter_or_exclude(negate, args, kwargs)
 
     def order_by(self, *field_names):
         new_args = []

linguo/models.py

@@ -158,9 +158,7 @@ def rewrite_unique_together(cls, local_trans_fields, attrs):
         return attrs
 
 
-class MultilingualModel(models.Model):
-    __metaclass__ = MultilingualModelBase
-
+class MultilingualModel(models.Model, metaclass=MultilingualModelBase):
     objects = MultilingualManager()
 
     class Meta:
@@ -202,3 +200,13 @@ def translate(self, language, **kwargs):
             setattr(self, key, val)  # Set values on the object
         # Now switch back
         self._force_language = old_forced_language
+
+    def get_deferred_fields(self):
+        """
+        Return a set containing names of deferred fields for this instance.
+        """
+        return {
+            f.attname for f in self._meta.concrete_fields
+            if f.attname not in self.__dict__ and \
+               f.attname not in self._meta.translatable_fields
+        }