46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
import psycopg2
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import click
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from flask import current_app, g
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from flask.cli import with_appcontext
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def get_db():
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"""Connect to the application's configured database. The connection
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is unique for each request and will be reused if this is called
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again.
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"""
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if 'db' not in g:
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g.db = psycopg2.connect(dbname="postgres", user="postgres", password="postgres", host="db")
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return g.db
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def close_db(e=None):
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"""If this request connected to the database, close the
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connection.
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"""
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db = g.pop('db', None)
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if db is not None:
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db.close()
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def init_db():
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"""Clear existing data and create new tables."""
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db = get_db()
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with current_app.open_resource('schema.sql') as f:
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db.cursor().execute(f.read().decode('utf8'))
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db.commit()
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@click.command('init-db')
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@with_appcontext
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def init_db_command():
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"""Clear existing data and create new tables."""
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init_db()
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click.echo('Initialized the database.')
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def init_app(app):
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"""Register database functions with the Flask app. This is called by
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the application factory.
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"""
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app.teardown_appcontext(close_db)
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app.cli.add_command(init_db_command) |