AttributeError: type object 'Page' has no attribute 'query'

Question

尝试添加自定义批处理操作但我一直收到此错误，我已将我的导入添加到代码中以显示我正在导入的内容，此文件独立于我的模型文件，这是我的 views.py 文件

Views.py

import flask_admin as admin
import textwrap
from flask_admin.actions import action
from flask_admin.contrib import sqla
from flask_admin.contrib.sqla import ModelView
from flask_admin.contrib.sqla.filters import FilterEqual
from app.models import FileRegister, FileRegisterStatus
from app import app, db, models


class PageView(ModelView):
    @action("active", "Active", 'Are you sure you want to active selected pages?')
def action_active(self, ids):
    try:
        query = Page.query.filter(Page.id.in_(ids))

        count = 0
        for page in query.all():
            page.is_active = True    
            count += 1

        flash(ngettext('Page was successfully activated.',
                       '%(count)s pages were successfully activated.',
                       count,
                       count=count))
    except Exception as ex:
        if not self.handle_view_exception(ex):
            raise

        flash(gettext('Failed to active pages. %(error)s', error=str(ex)), 'error')

models.py

    from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, Boolean, TIMESTAMP, ForeignKey
import datetime

Base = declarative_base()


class Page(Base):
    __tablename__ = 'page'
    id = Column(Integer, primary_key=True, nullable=False, autoincrement=True)
    page_name= Column(String(500), index=True, nullable=False)
    is_page_active= Column(Boolean())

    def __init__(self, page_name, is_page_active):
        self.page_name= page_name
        self.is_page_active= is_page_active

    def __unicode__(self):
        return self.page_name

这是我在运行代码之后得到的回溯（最近调用最后一次），我认为这是因为我在映射类而不是会话上调用了 query()？

   Traceback (most recent call last):
  File "C:\page\env\lib\site-packages\flask\app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\page\env\lib\site-packages\flask\app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "C:\page\env\lib\site-packages\flask\app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\page\env\lib\site-packages\flask\app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\page\env\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\page\env\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\page\env\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\page\env\lib\site-packages\flask\app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\page\flask_admin\base.py", line 69, in inner
    return self._run_view(f, *args, **kwargs)
  File "C:\page\flask_admin\base.py", line 368, in _run_view
    return fn(self, *args, **kwargs)
  File "c:\page\flask_admin\model\base.py", line 2145, in action_view
    return self.handle_action()
  File "C:\page\flask_admin\actions.py", line 117, in handle_action
    response = handler[0](ids)
  File "C:\page\app\views.py", line 28, in action_active
    if not self.handle_view_exception(ex):
  File "c:\page\flask_admin\contrib\sqla\view.py", line 1060, in handle_view_exception
    return super(ModelView, self).handle_view_exception(exc)
  File "C:\page\app\views.py", line 16, in action_active
    query = Page.query.filter(Page.active_ind.in_(ids))
AttributeError: type object 'Page' has no attribute 'query'

Answer 1

因为我使用的是声明式模型，所以这就是解决方法。这进入 models.py 文件

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import scoped_session, sessionmaker    

engine = create_engine('databaselinkgoeshere', convert_unicode=True)
    db_session = scoped_session(sessionmaker(autocommit=False,
                                             autoflush=False,
                                             bind=engine))

Base = declarative_base()
Base.query = db_session.query_property()

AttributeError: type object 'Page' has no attribute 'query'

AttributeError: type object 'Page' has no attribute 'query'

python

flask

flask-admin