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"""Thin wrappers over functions in connection.introspection that don't require
creating a cursor.
This makes test code less verbose and easier to read/write.
"""
from contextlib import contextmanager
from typing import Optional
from django.db import connection
from psqlextra.settings import postgres_set_local
@contextmanager
def introspect(schema_name: Optional[str] = None):
with postgres_set_local(search_path=schema_name or None):
with connection.cursor() as cursor:
yield connection.introspection, cursor
def table_names(
include_views: bool = True, *, schema_name: Optional[str] = None
):
"""Gets a flat list of tables in the default database."""
with introspect(schema_name) as (introspection, cursor):
return introspection.table_names(cursor, include_views)
def get_partitioned_table(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets the definition of a partitioned table in the default database."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_partitioned_table(cursor, table_name)
def get_partitions(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets a list of partitions for the specified partitioned table in the
default database."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_partitions(cursor, table_name)
def get_columns(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets a list of columns for the specified table."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_columns(cursor, table_name)
def get_relations(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets a list of relations for the specified table."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_relations(cursor, table_name)
def get_constraints(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets a list of constraints and indexes for the specified table."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_constraints(cursor, table_name)
def get_sequences(
table_name: str,
*,
schema_name: Optional[str] = None,
):
"""Gets a list of sequences own by the specified table."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_sequences(cursor, table_name)
def get_storage_settings(table_name: str, *, schema_name: Optional[str] = None):
"""Gets a list of all storage settings that have been set on the specified
table."""
with introspect(schema_name) as (introspection, cursor):
return introspection.get_storage_settings(cursor, table_name)
|
