Fixed #23892 -- Made deconstructible classes forwards compatible

django/db/migrations/operations/base.py

@@ -37,6 +37,9 @@ class Operation(object):
         self._constructor_args = (args, kwargs)
         return self
 
+    def __init__(self, **kwargs):
+        pass
+
     def deconstruct(self):
         """
         Returns a 3-tuple of class import path (or just name if it lives

django/db/migrations/operations/fields.py

@@ -10,7 +10,7 @@ class AddField(Operation):
     Adds a field to a model.
     """
 
-    def __init__(self, model_name, name, field, preserve_default=True):
+    def __init__(self, model_name, name, field, preserve_default=True, **kwargs):
         self.model_name = model_name
         self.name = name
         self.field = field
@@ -69,7 +69,7 @@ class RemoveField(Operation):
     Removes a field from a model.
     """
 
-    def __init__(self, model_name, name):
+    def __init__(self, model_name, name, **kwargs):
         self.model_name = model_name
         self.name = name
 
@@ -113,7 +113,7 @@ class AlterField(Operation):
     Alters a field's database column (e.g. null, max_length) to the provided new field
     """
 
-    def __init__(self, model_name, name, field, preserve_default=True):
+    def __init__(self, model_name, name, field, preserve_default=True, **kwargs):
         self.model_name = model_name
         self.name = name
         self.field = field
@@ -177,7 +177,7 @@ class RenameField(Operation):
     Renames a field on the model. Might affect db_column too.
     """
 
-    def __init__(self, model_name, old_name, new_name):
+    def __init__(self, model_name, old_name, new_name, **kwargs):
         self.model_name = model_name
         self.old_name = old_name
         self.new_name = new_name

django/db/migrations/operations/models.py

@@ -14,7 +14,7 @@ class CreateModel(Operation):
 
     serialization_expand_args = ['fields', 'options']
 
-    def __init__(self, name, fields, options=None, bases=None):
+    def __init__(self, name, fields, options=None, bases=None, **kwargs):
         self.name = name
         self.fields = fields
         self.options = options or {}
@@ -79,7 +79,7 @@ class DeleteModel(Operation):
     Drops a model's table.
     """
 
-    def __init__(self, name):
+    def __init__(self, name, **kwargs):
         self.name = name
 
     def deconstruct(self):
@@ -116,7 +116,7 @@ class RenameModel(Operation):
     Renames a model.
     """
 
-    def __init__(self, old_name, new_name):
+    def __init__(self, old_name, new_name, **kwargs):
         self.old_name = old_name
         self.new_name = new_name
 
@@ -209,7 +209,7 @@ class AlterModelTable(Operation):
     Renames a model's table
     """
 
-    def __init__(self, name, table):
+    def __init__(self, name, table, **kwargs):
         self.name = name
         self.table = table
 
@@ -260,7 +260,7 @@ class AlterUniqueTogether(Operation):
     """
     option_name = "unique_together"
 
-    def __init__(self, name, unique_together):
+    def __init__(self, name, unique_together, **kwargs):
         self.name = name
         unique_together = normalize_together(unique_together)
         self.unique_together = set(tuple(cons) for cons in unique_together)
@@ -305,7 +305,7 @@ class AlterIndexTogether(Operation):
     """
     option_name = "index_together"
 
-    def __init__(self, name, index_together):
+    def __init__(self, name, index_together, **kwargs):
         self.name = name
         index_together = normalize_together(index_together)
         self.index_together = set(tuple(cons) for cons in index_together)
@@ -348,7 +348,7 @@ class AlterOrderWithRespectTo(Operation):
     Represents a change with the order_with_respect_to option.
     """
 
-    def __init__(self, name, order_with_respect_to):
+    def __init__(self, name, order_with_respect_to, **kwargs):
         self.name = name
         self.order_with_respect_to = order_with_respect_to
 
@@ -407,7 +407,7 @@ class AlterModelOptions(Operation):
         "verbose_name_plural",
     ]
 
-    def __init__(self, name, options):
+    def __init__(self, name, options, **kwargs):
         self.name = name
         self.options = options
 

django/db/migrations/operations/special.py

@@ -11,7 +11,7 @@ class SeparateDatabaseAndState(Operation):
     that affect the state or not the database, or so on.
     """
 
-    def __init__(self, database_operations=None, state_operations=None):
+    def __init__(self, database_operations=None, state_operations=None, **kwargs):
         self.database_operations = database_operations or []
         self.state_operations = state_operations or []
 
@@ -62,7 +62,7 @@ class RunSQL(Operation):
     by this SQL change, in case it's custom column/table creation/deletion.
     """
 
-    def __init__(self, sql, reverse_sql=None, state_operations=None):
+    def __init__(self, sql, reverse_sql=None, state_operations=None, **kwargs):
         self.sql = sql
         self.reverse_sql = reverse_sql
         self.state_operations = state_operations or []
@@ -122,7 +122,7 @@ class RunPython(Operation):
 
     reduces_to_sql = False
 
-    def __init__(self, code, reverse_code=None, atomic=True):
+    def __init__(self, code, reverse_code=None, atomic=True, **kwargs):
         self.atomic = atomic
         # Forwards code
         if not callable(code):