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from peewee import *
try:
import psycopg
#from psycopg.types.json import Jsonb
except ImportError:
psycopg = None
class Psycopg3Database(PostgresqlDatabase):
def _connect(self):
if psycopg is None:
raise ImproperlyConfigured('psycopg3 is not installed!')
conn = psycopg.connect(dbname=self.database, **self.connect_params)
if self._isolation_level is not None:
conn.isolation_level = self._isolation_level
conn.autocommit = True
return conn
def get_binary_type(self):
return psycopg.Binary
def _set_server_version(self, conn):
self.server_version = conn.pgconn.server_version
if self.server_version >= 90600:
self.safe_create_index = True
def is_connection_usable(self):
if self._state.closed:
return False
# Returns True if we are idle, running a command, or in an active
# connection. If the connection is in an error state or the connection
# is otherwise unusable, return False.
conn = self._state.conn
return conn.pgconn.transaction_status < conn.TransactionStatus.INERROR