We tell it what database and communication-library to use, the username, password, url and even database to connect to.In the end we create a db variable, which points to the SQLAlchemy Extension object.DB_URL = 'postgresql+psycopg2://{user}:{pw}@{url}/{db}'.format(user=POSTGRES_...
self.assertEqual('postgres', params['user'])#connectto postgresql (w/ psycopg2)conn = psycopg2.connect(**pgsql.dsn()) self.assertIsNotNone(conn) self.assertRegexpMatches(pgsql.read_bootlog(),'is ready to accept connections') conn.close()#connectto postgresql (w/ sqlalchemy)engine = sql...
[SIP] Proposal for Ability to connect to postgres with different schema with superset_config Motivation I need to connect to the same database as my application but use a different schema name than public Proposed Change Currently we have: SQLALCHEMY_DATABASE_URI = f"postgresql+psycopg2://{env...
Application-side poolers are built into connection libraries and API servers, such as Prisma, SQLAlchemy, and PostgREST. They maintain several active connections with Postgres or a server-side pooler, reducing the overhead of establishing connections between queries. When deploying to static architect...
The SQLReader provides DBMS specific connection types for fast and efficient communication with MS-Access, MySQL, Postgres, SQLite and SQL Server (MS-SQL), as well as the generic connection types, PyODBC and SQLAlchemy, that allow to connect to various DBMS if the required database drivers ...
config['SQLALCHEMY_DATABASE_URI'] = 'postgresql+psycopg2://<user>:<pass>@snappiesticker-24.postgres.pythonanywhere-services.com:10024/snappie' db = SQLAlchemy(app) db.create_all() Then when I try and run this, it times out on the db.create_all() line. Here is the full traceback ...
sqlalchemy/engine/base.py”, line 1177, in _execute_context conn = self._revalidate_connection() File “/usr/local/lib/python3.6/site-packages/sqlalchemy/engine/base.py”, line 463, in _revalidate_connection"Can’t reconnect until invalid "sqlalchemy.exc.InvalidRequestError: Can’t reconnect...
SQLAlchemy models have a few reserved variables names which can be used to further configure the corresponding database tables. Here are a few examples: __tablename__: Set the name of the resulting table. __table_args__ = {"schema": "my_name"}: Sets the Postgres schema to save the ...
dialect+driver://username:password@host:port/database # For PostgreSQL postgres+psycopg2://username:password@localhost:8050/test-database For more information on dialects and drivers, see the official SQLAlchemy documentation.Dash Python > Dash Enterprise > Connect a Dash App to an SQL Database ...
HOW TO CREATE DB from python interpreter (same level as powertoken/):from background.database import init_db init_db() OR via FLASK go to localhost:xxxx/createDB MIGRATION Setup SQLALCHEMY Alembic (nice tutorial here:https://www.learndatasci.com/tutorials/using-databases-python-postgres-sql...