[英]Flask App Builder throws KeyError on arrays
我有一個帶有字符串數組類型屬性的表:
create table mytable(
suffix VARCHAR(200) PRIMARY KEY,
label VARCHAR(200) NOT NULL,
sourceuris VARCHAR(200)[],
);
它在models.py
定義為:
class mytable(Model):
suffix = Column(String(200), primary_key=True)
label = Column(String(200), nullable=False)
sourceuris = Column(ARRAY(String(200)))
def __repr__(self):
return self.label
現在我想在views.py
使用 Flask AppBuilder 定義一個視圖:
class mytable(ModelView):
datamodel = SQLAInterface(mytable)
label_columns = {'label':'Name'}
list_columns = ['suffix', 'label', 'sourceuris']
它可以編譯,但是當我在http://127.0.0.1:5000/mytableviewview/list/
的 Web 應用程序中打開視圖時,我收到一個 `KeyError: 'sourceuris':
2020-08-26 12:50:42,329:WARNING:flask_appbuilder.models.filters:Filter type not supported for column: sourceuris
2020-08-26 12:50:42,329:WARNING:flask_appbuilder.models.filters:Filter type not supported for column: sourceuris
2020-08-26 12:50:42,332:WARNING:flask_appbuilder.models.filters:Filter type not supported for column: sourceuris
2020-08-26 12:50:42,394:ERROR:app:Exception on /mytableview/list/ [GET]
Traceback (most recent call last):
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/security/decorators.py", line 109, in wraps
return f(self, *args, **kwargs)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/views.py", line 552, in list
return self.render_template(
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/baseviews.py", line 280, in render_template
return render_template(
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/templating.py", line 137, in render_template
return _render(
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask/templating.py", line 120, in _render
rv = template.render(context)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/jinja2/environment.py", line 1090, in render
self.environment.handle_exception()
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/jinja2/environment.py", line 832, in handle_exception
reraise(*rewrite_traceback_stack(source=source))
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/jinja2/_compat.py", line 28, in reraise
raise value.with_traceback(tb)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html", line 2, in top-level template code
{% import 'appbuilder/general/lib.html' as lib %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/base.html", line 1, in top-level template code
{% extends base_template %}
File "/home/konrad/projekte/hito/database-frontend/app/templates/base.html", line 1, in top-level template code
{% extends 'appbuilder/baselayout.html' %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html", line 2, in top-level template code
{% import 'appbuilder/baselib.html' as baselib %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/init.html", line 46, in top-level template code
{% block body %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html", line 19, in block "body"
{% block content %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html", line 7, in block "content"
{% block list_search scoped %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html", line 8, in block "list_search"
{% call lib.accordion_tag("accordion1",_("Search"), False) %}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/jinja2/runtime.py", line 679, in _invoke
rv = self._func(*arguments)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/general/lib.html", line 291, in template
{{ caller() }}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/jinja2/runtime.py", line 679, in _invoke
rv = self._func(*arguments)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html", line 9, in template
{{ widgets.get('search')()|safe }}
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/flask_appbuilder/widgets.py", line 114, in __call__
label_columns[col] = as_unicode(self.template_args["form"][col].label.text)
File "/home/konrad/projekte/hito/database-frontend/venv/lib/python3.8/site-packages/wtforms/form.py", line 64, in __getitem__
return self._fields[name]
KeyError: 'sourceuris'
即使我從 list_columns 數組中刪除了“sourceuris”,錯誤仍然存在。
如何讓 Flask AppBuilder 無錯誤地顯示數組?
編輯:我實現了@mehdy 的建議,但是創建不起作用,並且在編輯時我無法更改數組的大小。 請參閱以下屏幕截圖:
創建不起作用,因為數組最初是空的,我無法將大小增加到一個元素。
請注意,實際情況下的數組稱為“同義詞”,而不是最小示例中的“sourceuris”。
該問題是由search
表單字段引起的。 為避免這種情況,您可以按sourceuris
從search
表單字段中排除sourceuris
。
search_exclude_columns = ['sourceuris']
但是由於Flask-AppBuilder
不支持Array
字段,因此您必須將這些字段添加到屬性中才能使其工作。
from wtforms import FieldList, StringField
add_form_extra_fields = {'sourceuris': FieldList(StringField('Source URIs'), min_entries=1)}
edit_form_extra_fields = {'sourceuris': FieldList(StringField('Source URIs'), min_entries=1)}
所有這三個屬性都必須添加到您的ModelView
類中。
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