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sqlalchemy.exc.ArgumentError: impossible d'analyser l'URL rfc1738 à partir de la chaîne

J'apprends le microframework Web en flacon et, après l'initialisation de ma base de données, je lance flask db init. Je lance flask db migrate, pour migrer mes classes de modèles dans la base de données et j'ai obtenu une erreur. Je travaille sur Windows 10, la base de données est MySQL et les extensions à installer sont flask-migrate, flask-sqlalchemy, flask-login.

(env) λ flask db migrate
Traceback (most recent call last):
  File "c:\python36\Lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python36\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\aka\Dev\dream-team\env\Scripts\flask.exe\__main__.py", line 9, in <module>
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\flask\cli.py", line 513, in main
    cli.main(args=args, prog_name=name)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\flask\cli.py", line 380, in main
    return AppGroup.main(self, *args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 697, in main
    rv = self.invoke(ctx)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\flask\cli.py", line 257, in decorator
    return __ctx.invoke(f, *args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\click\core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\flask_migrate\cli.py", line 90, in migrate
    rev_id, x_arg)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\flask_migrate\__init__.py", line 197, in migrate
    version_path=version_path, rev_id=rev_id)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\alembic\command.py", line 176, in revision
    script_directory.run_env()
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\alembic\script\base.py", line 427, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\alembic\util\pyfiles.py", line 81, in load_python_file
    module = load_module_py(module_id, path)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\alembic\util\compat.py", line 83, in load_module_py
    spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "migrations\env.py", line 87, in <module>
    run_migrations_online()
  File "migrations\env.py", line 70, in run_migrations_online
    poolclass=pool.NullPool)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\sqlalchemy\engine\__init__.py", line 465, in engine_from_config
    return create_engine(url, **options)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\sqlalchemy\engine\__init__.py", line 424, in create_engine
    return strategy.create(*args, **kwargs)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\sqlalchemy\engine\strategies.py", line 50, in create
    u = url.make_url(name_or_url)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\sqlalchemy\engine\url.py", line 211, in make_url
    return _parse_rfc1738_args(name_or_url)
  File "c:\users\aka\dev\dream-team\env\lib\site-packages\sqlalchemy\engine\url.py", line 270, in _parse_rfc1738_args
    "Could not parse rfc1738 URL from string '%s'" % name)
sqlalchemy.exc.ArgumentError: Could not parse rfc1738 URL from string 'mysql/dt_admin:dt2016@localhost/dreamteam_db'
python-3.xflaskflask-sqlalchemyflask-loginflask-migrate
2
sylvan kadjo

Vous n'utilisez pas une URL valide dans la chaîne de connexion.

Consultez la documentation sur la structure des URL de connexion MySQL: http://docs.sqlalchemy.org/en/latest/dialects/mysql.html .

Selon le pilote MySQL que vous utilisez, l'URL de connexion est différente. Par exemple, si vous utilisez pymysql, votre URL devrait être:

mysql+pymysql://<username>:<password>@<Host>/<dbname>[?<options>]
4
Miguel

j'oublierais le numéro de port pour entrer le port, il s'agit de la chaîne de connexion URL:

`SQLALCHEMY_DATABASE_URI = 'mysql://dt_admin:dt2016@localhost:3308/dreamteam_db'

ça marche maintenant, merci

1
sylvan kadjo