Add add_remove alias on Many2Many for compatibility with One2Many

issue4112
review5511002

doc/ref/models/fields.rst

@@ -611,6 +611,10 @@ This field accepts as written value a list of tuples like the :class:`One2Many`.
     An integer or a PYSON expression denoting the maximum number of records
     allowed in the relation.
 
+.. attribute:: Many2Many.add_remove
+
+    An alias to the :attr:`domain` for compatibility with the :class:`One2Many`.
+
 Instance methods:
 
 .. method:: Many2Many.get_target()

trytond/model/fields/many2many.py

@@ -58,6 +58,10 @@ class Many2Many(Field):
 
     size = property(_get_size, _set_size)
 
+    @property
+    def add_remove(self):
+        return self.domain
+
     def get(self, ids, model, name, values=None):
         '''
         Return target records ordered.