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from .delete_partition import PostgresDeletePartition
class PostgresDeleteRangePartition(PostgresDeletePartition):
"""Deletes a range partition that's part of a.
:see:PartitionedPostgresModel.
"""
def database_backwards(
self, app_label, schema_editor, from_state, to_state
):
model = to_state.apps.get_model(app_label, self.model_name)
model_state = to_state.models[(app_label, self.model_name_lower)]
if self.allow_migrate_model(schema_editor.connection.alias, model):
partition_state = model_state.partitions[self.name]
schema_editor.add_range_partition(
model,
partition_state.name,
partition_state.from_values,
partition_state.to_values,
)
def describe(self) -> str:
return "Deletes range partition '%s' on %s" % (
self.name,
self.model_name,
)
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