Renamed variables after generalization of constraints.

Follow up to 8eae094638.

django/db/backends/base/schema.py

@@ -292,7 +292,7 @@ class BaseDatabaseSchemaEditor:
         for fields in model._meta.unique_together:
             columns = [model._meta.get_field(field).column for field in fields]
             self.deferred_sql.append(self._create_unique_sql(model, columns))
-        constraints = [check.constraint_sql(model, self) for check in model._meta.constraints]
+        constraints = [constraint.constraint_sql(model, self) for constraint in model._meta.constraints]
         # Make the table
         sql = self.sql_create_table % {
             "table": self.quote_name(model._meta.db_table),

tests/constraints/tests.py

@@ -80,8 +80,8 @@ class UniqueConstraintTests(TestCase):
     def test_deconstruction(self):
         fields = ['foo', 'bar']
         name = 'unique_fields'
-        check = models.UniqueConstraint(fields=fields, name=name)
-        path, args, kwargs = check.deconstruct()
+        constraint = models.UniqueConstraint(fields=fields, name=name)
+        path, args, kwargs = constraint.deconstruct()
         self.assertEqual(path, 'django.db.models.UniqueConstraint')
         self.assertEqual(args, ())
         self.assertEqual(kwargs, {'fields': tuple(fields), 'name': name})