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import sqlite3
import click
from flask import current_app, g
def get_db():
if 'db' not in g:
g.db = sqlite3.connect(
current_app.config['DATABASE'],
detect_types=sqlite3.PARSE_DECLTYPES
)
# Return rows that behave like dicts
g.db.row_factory = sqlite3.Row
return g.db
def close_db(e=None):
db = g.pop('db', None)
if db:
db.close()
# CLI:
# https://flask.palletsprojects.com/en/3.0.x/cli/
def init_db():
db = get_db()
with current_app.open_resource('schema.sql') as f:
db.executescript(f.read().decode('utf8'))
@click.command('init-db')
def init_db_command():
"""Clear the existing data and create new tables."""
init_db()
click.echo('Initialized the database.')
# Register function with application
def init_app(app):
app.teardown_appcontext(close_db) # callback after returning response
app.cli.add_command(init_db_command)
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