Python Flask管理员：混合属性可以搜索吗？_Python_Flask Sqlalchemy_Flask Admin

Python Flask管理员：混合属性可以搜索吗？

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Python Flask管理员：混合属性可以搜索吗？,python,flask-sqlalchemy,flask-admin,Python,Flask Sqlalchemy,Flask Admin,在使用Flask Admin创建的列表视图中，我添加了两列sqlalchemy对象，它们实际上是在我的对象类中使用混合属性计算的 class MyClass(db.Model): @hybrid_property def state(self): now = datetime.datetime.now() state = 'OK' for panne in self.pannes: if panne.f_

在使用Flask Admin创建的列表视图中，我添加了两列sqlalchemy对象，它们实际上是在我的对象类中使用混合属性计算的


class MyClass(db.Model):

    @hybrid_property
    def state(self):
        now = datetime.datetime.now()
        state = 'OK'
        for panne in self.pannes:
            if panne.f_indispo < now:
                continue
            if panne.d_indispo <= now and panne.f_indispo >= now:
                state = 'KO'
                break
            if panne.d_indispo > now:
                state = 'PR'
        return state

    @hybrid_property
    def station_name(self):
        if app.config['STATIONS'] is not None and self.id_station in app.config['STATIONS']:
            return app.config['STATIONS'][self.id_station]
        return unicode(self.id_station)

除了我的两个“混合列”既不能搜索也不能排序之外，一切都正常。如果我将它们添加到列可搜索列表中，我会得到：

“国家”财产：

File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 271, in __init__ super(ModelView, self).__init__(model, name, category, endpoint, url) File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/model/base.py", line 515, in __init__ self._refresh_cache() File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/model/base.py", line 540, in _refresh_cache self._search_supported = self.init_search() File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 410, in init_search for column in self._get_columns_for_field(p): File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 379, in _get_columns_for_field attr = getattr(self.model, field, None) File "/usr/lib/python2.6/site-packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/sqlalchemy/ext/hybrid.py", line 738, in __get__ return self.expr(owner) File "/var/www/***/app/***.py", line 90, in state for panne in self.pannes: File "/usr/lib/python2.6/site-packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/sqlalchemy/sql/operators.py", line 338, in __getitem__ return self.operate(getitem, index) File "/usr/lib/python2.6/site-packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/sqlalchemy/orm/attributes.py", line 171, in operate return op(self.comparator, *other, **kwargs) File "/usr/lib/python2.6/site-packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/sqlalchemy/sql/operators.py", line 338, in __getitem__ return self.operate(getitem, index) File "/usr/lib/python2.6/site-packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/sqlalchemy/sql/operators.py", line 183, in operate raise NotImplementedError(str(op)) NotImplementedError: 文件“/usr/lib/python2.6/site packages/Flask_Admin-1.0.8-py2.6.egg/Flask_Admin/contrib/sqla/view.py”，第271行，在__ super（ModelView，self）。\uuuuu init\uuuuuu（模型、名称、类别、端点、url）文件“/usr/lib/python2.6/site packages/Flask_Admin-1.0.8-py2.6.egg/Flask_Admin/model/base.py”，第515行，在__ self.\u刷新\u缓存（）文件“/usr/lib/python2.6/site packages/Flask_Admin-1.0.8-py2.6.egg/Flask_Admin/model/base.py”，第540行，在刷新缓存中 self.\u search\u supported=self.init\u search（）文件“/usr/lib/python2.6/site packages/Flask_Admin-1.0.8-py2.6.egg/Flask_Admin/contrib/sqla/view.py”，第410行，在初始搜索中对于self中的列。\u获取\u列\u用于\u字段（p）：文件“/usr/lib/python2.6/site packages/Flask\u Admin-1.0.8-py2.6.egg/Flask\u Admin/contrib/sqla/view.py”，第379行，在\u字段的\u get\u列中 attr=getattr（self.model，字段，无）文件“/usr/lib/python2.6/site packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/SQLAlchemy/ext/hybrid.py”，第738行，在__ 返回self.expr（所有者）文件“/var/www/***/app/***.py”，第90行，处于状态对于self.pannes中的panne：文件“/usr/lib/python2.6/site packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/SQLAlchemy/sql/operators.py”，第338行，在u getitem中__ 返回self.operate（getitem，index）文件“/usr/lib/python2.6/site packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/SQLAlchemy/orm/attributes.py”，第171行，在operate中返回op（自比较器，*其他，**kwargs）文件“/usr/lib/python2.6/site packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/SQLAlchemy/sql/operators.py”，第338行，在u getitem中__ 返回self.operate（getitem，index）文件“/usr/lib/python2.6/site packages/SQLAlchemy-0.9.6-py2.6-linux-x86_64.egg/SQLAlchemy/sql/operators.py”，第183行，在operate中引发未实施错误（str（op））未实现错误： “站点名称”属性：

如果可能的话，我暂时不知道如何解决这些错误。

这是最近在这个拉取请求中修复的：

现在，有一个使用混合属性的示例：

第二个链接已断开。请查收。 File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 271, in __init__ super(ModelView, self).__init__(model, name, category, endpoint, url) File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/model/base.py", line 515, in __init__ self._refresh_cache() File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/model/base.py", line 540, in _refresh_cache self._search_supported = self.init_search() File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 410, in init_search for column in self._get_columns_for_field(p): File "/usr/lib/python2.6/site-packages/Flask_Admin-1.0.8-py2.6.egg/flask_admin/contrib/sqla/view.py", line 390, in _get_columns_for_field raise Exception('Invalid field %s: does not contains any columns.' % field) Exception: Invalid field station_name: does not contains any columns.