57df4824ea
- Add return type annotations and parameter types - Import necessary typing modules (Optional, Union, Flask, Response) - Improve code readability and IDE support for examples - All existing tests continue to pass
58 lines
1.4 KiB
Python
58 lines
1.4 KiB
Python
import sqlite3
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from datetime import datetime
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import click
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from flask import current_app
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from flask import g
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from flask import Flask
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def get_db() -> sqlite3.Connection:
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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 = sqlite3.connect(
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current_app.config["DATABASE"], detect_types=sqlite3.PARSE_DECLTYPES
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)
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g.db.row_factory = sqlite3.Row
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return g.db
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def close_db(e=None) -> 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() -> None:
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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.executescript(f.read().decode("utf8"))
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@click.command("init-db")
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def init_db_command() -> None:
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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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sqlite3.register_converter("timestamp", lambda v: datetime.fromisoformat(v.decode()))
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def init_app(app: Flask) -> None:
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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)
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