getting AttributeError: 'function' object has no attribute 'commit_select' after inject database in a Flask-Admin Peewee web app

Question

在 this example 之后，我将 Flask admin 与一些已经创建的 peewee 模型集成在一起。在我尝试管理界面的列表视图之前，一切看起来都很棒，但首先是一些上下文：

代码

app.py文件的重要部分：

def create_app(config_object=DevConfig):
    app = Flask(__name__)
    app.config.from_object(config_object)
    register_extensions(app)
    register_blueprints(app)
    register_errorhandlers(app)
    return app


def register_extensions(app):
    """Register Flask extensions."""
    assets.init_app(app)
    bcrypt.init_app(app)
    cache.init_app(app)
    login_manager.init_app(app)
    debug_toolbar.init_app(app)
    admin = Admin(app, name=__name__, template_mode='bootstrap3')
    __add_admin_views(admin)
    return None


def __add_admin_views(admin):
    admin.add_view(ClientAdmin(entities.Client))
    return None

包初始化文件中数据库对象的注入：

def persistence_config(binder):
  db_user = "postgres"
  db_name = "MY_DB_NAME"
  db_password = "MY_PASS"
  db_host = "127.0.0.1"
  db_port = 5432
  db = PooledPostgresqlExtDatabase(
    database=db_name,
    user=db_user,
    host=db_host,
    password=db_password,
    max_connections=8,
    stale_timeout=300,
    register_hstore=False)
  binder.bind(Database, lambda: db)

错误

当我尝试请求客户列表 (http://127.0.0.1:5000/admin/client/) 时会发生这种情况：

 Traceback (most recent call last):
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "MY_ENV_PATH/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "MY_ENV_PATH/lib/python2.7/site-packages/flask_admin/base.py", line 68, in inner
    return self._run_view(f, *args, **kwargs)
  File "MY_ENV_PATH/lib/python2.7/site-packages/flask_admin/base.py", line 367, in _run_view
    return fn(self, *args, **kwargs)
  File "MY_ENV_PATH/lib/python2.7/site-packages/flask_admin/model/base.py", line 1738, in index_view
    view_args.search, view_args.filters)
  File "MY_ENV_PATH/lib/python2.7/site-packages/flask_admin/contrib/peewee/view.py", line 353, in get_list
    query = self.get_query()
  File "MY_ENV_PATH/lib/python2.7/site-packages/flask_admin/contrib/peewee/view.py", line 328, in get_query
    return self.model.select()
  File "MY_ENV_PATH/lib/python2.7/site-packages/peewee.py", line 4458, in select
    query = SelectQuery(cls, *selection)
  File "MY_ENV_PATH/lib/python2.7/site-packages/peewee.py", line 2696, in __init__
    self.require_commit = self.database.commit_select
AttributeError: 'function' object has no attribute 'commit_select'

Answer 1

我在我的代码中发现了这个问题，它与我将数据库对象注入模型的方式有关。我不得不使用构造函数绑定而不是普通绑定，因为我绑定了一个 lambda 函数：

binder.bind_to_constructor(Database, lambda: db)

getting AttributeError: 'function' object has no attribute 'commit_select' after inject database in a Flask-Admin Peewee web app

getting AttributeError: 'function' object has no attribute 'commit_select' after inject database in a Flask-Admin Peewee web app

python

flask

peewee

flask-admin

python-inject

代码

错误