Question

我有两个型号

在users / models.py

中

class User(db.Model):
    __tablename__ = 'users'
   id = db.Column('id', db.Integer, primary_key=True)
   feedbacks = db.relationship(
          'Feedback', backref='user', lazy='select')

以units / models.py

表示

class Feedback(db.Model):
    __tablename__ = 'feedbacks'
    id = db.Column('id', db.Integer, primary_key=True)
    author_id = db.Column('author_id', db.ForeignKey('users.id'))

架构引发错误：

Traceback (most recent call last):
  File "manage.py", line 9, in <module>
    from main import app, db
  File "/home/iromanov/work/sqvr/src/main.py", line 62, in <module>
    app = create_app()
  File "/home/iromanov/work/sqvr/src/main.py", line 54, in create_app
    create_admin_panel(app_name, admin_manager, db)
  File "/home/iromanov/work/sqvr/src/admins.py", line 38, in create_admin_panel
    category=app_name.capitalize())
  File "/home/iromanov/work/sqvr/src/admins.py", line 22, in __init__
    model, session, name, category, endpoint, url)
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/contrib/sqla/view.py", line 271, in __init__
    super(ModelView, self).__init__(model, name, category, endpoint, url)
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/model/base.py", line 515, in __init__
    self._refresh_cache()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/model/base.py", line 523, in _refresh_cache
    self._list_columns = self.get_list_columns()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/model/base.py", line 644, in get_list_columns
    columns = self.scaffold_list_columns()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/contrib/sqla/view.py", line 322, in scaffold_list_columns
    for p in self._get_model_iterator():
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/contrib/sqla/view.py", line 293, in _get_model_iterator
    return model._sa_class_manager.mapper.iterate_properties
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/mapper.py", line 1797, in iterate_properties
    configure_mappers()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/mapper.py", line 2583, in configure_mappers
    mapper._post_configure_properties()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/mapper.py", line 1688, in _post_configure_properties
    prop.init()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/interfaces.py", line 144, in init
    self.do_init()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/relationships.py", line 1549, in do_init
    self._process_dependent_arguments()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/relationships.py", line 1605, in _process_dependent_arguments
    self.target = self.mapper.mapped_table
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 725, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/orm/relationships.py", line 1522, in mapper
    argument = self.argument()
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/sqlalchemy/ext/declarative/clsregistry.py", line 278, in __call__
    (self.prop.parent, self.arg, n.args[0], self.cls)
sqlalchemy.exc.InvalidRequestError: When initializing mapper Mapper|User|users, expression u'Vote' failed to locate a name ("name 'Feedback' is not defined"). If this is a class name, consider adding this relationship() to the <class 'users.models.User'> class after both dependent classes have been defined.

但如果我将反馈导入添加到users.models.py，我有错误：

Traceback (most recent call last):
  File "manage.py", line 9, in <module>
    from main import app, db
  File "/home/iromanov/work/sqvr/src/main.py", line 62, in <module>
    app = create_app()
  File "/home/iromanov/work/sqvr/src/main.py", line 54, in create_app
    create_admin_panel(app_name, admin_manager, db)
  File "/home/iromanov/work/sqvr/src/admins.py", line 38, in create_admin_panel
    category=app_name.capitalize())
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask_admin/base.py", line 424, in add_view
    self.app.register_blueprint(view.create_blueprint(self))
  File "/home/iromanov/.virtualenvs/sqvr/local/lib/python2.7/site-packages/flask/app.py", line 62, in wrapper_func
    return f(self, *args, **kwargs)
  File "/home/iromanov/.virtu`enter code here`alenvs/sqvr/local/lib/python2.7/site-packages/flask/app.py", line 885, in register_blueprint
    (blueprint, self.blueprints[blueprint.name], blueprint.name)
AssertionError: A blueprint's name collision occurred between <flask.blueprints.Blueprint object at 0x7f5bacd66610> and <flask.blueprints.Blueprint object at 0x7f5bacfa7710>.  Both share the same name "voteview".  Blueprints that are created on the fly need unique names.

如果需要更多信息，请问我。

如果我在用户模型体中导入反馈，那么所有工作，但我认为这不是很酷。

Flask-SqlAlchemy模型导入问题

0 个答案: