def to_diff_tuple(self):
col_diff = []
schema, tname, cname = self.schema, self.table_name, self.column_name
if self.modify_type is not None:
col_diff.append(
("modify_type", schema, tname, cname,
{
"existing_nullable": self.existing_nullable,
"existing_server_default": self.existing_server_default,
},
self.existing_type,
self.modify_type)
)
if self.modify_nullable is not None:
col_diff.append(
("modify_nullable", schema, tname, cname,
{
"existing_type": self.existing_type,
"existing_server_default": self.existing_server_default
},
self.existing_nullable,
self.modify_nullable)
)
if self.modify_server_default is not False:
col_diff.append(
("modify_default", schema, tname, cname,
{
"existing_nullable": self.existing_nullable,
"existing_type": self.existing_type
},
self.existing_server_default,
self.modify_server_default)
)
return col_diff
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