WTForms 布尔字段总是 return True

Question

我写了自定义 FieldList :

    class EventForm(Form):
        enabled = BooleanField()
        user_role = IntegerField()


    class EventsForm(Form):
        user_roles = FieldList(FormField(EventForm))
        section_name = StringField()

class CompanyForm(BaseForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self._populate_event_permissions()

        def _populate_event_permissions(self):
        permissions = get_all_event_permissions()
        for event, value in permissions.items():
            form_field = self.event.append_entry(
                data={'section_name': event})
            field_1 = form_field.user_roles.append_entry(
                data={'enabled': True, 'user_role': 8})
            field_1.enabled.label.text = 'Participant'
            field_1.enabled.name = value
            field_2 = form_field.user_roles.append_entry(
                data={'user_role': 9})
            field_2.enabled.label.text = 'Organizer'
            field_2.enabled.name = value
            field_3 = form_field.user_roles.append_entry(
                data={'user_role': 10})
            field_3.enabled.label.text = 'Admin'
            field_3.enabled.name = value

在模板中很好地渲染了它，但每次当我尝试发送它并且复选框是 False 时，它总是发送 True，就像在 append_entry 中一样。这是我检查输入数据的方法。

class MyView(BaseModelView):
    def on_model_change(self, form, model, is_created):
        for section in form.event.entries:
            for entry in section.user_roles.entries:
                print(entry.enabled.data)

看起来表单总是发送 default value 无论复选框是真还是假我再次发送表单（无论复选框状态是什么）它会将数据库覆盖为 True。肯定存在表单看不到编辑值的问题。我该如何解决？

Answer 1

您正在表单本身的 init 方法中设置表单字段的值。作为加载相关视图的一部分，这可能会覆盖 request.form 在表单上设置的值。

您应该改为根据需要在 scaffold_form() 或 create_form()/edit_form() 中填充字段。

class MyView(BaseModelView):
    def scaffold_form(self):
        form = super(MyView, self).scaffold_form()

        permissions = get_all_event_permissions()
        for event, value in permissions.items():
            form_field = self.event.append_entry(data={'section_name': event})
            # etc.

        return form

WTForms 布尔字段总是 return True

WTForms booleanfield always return True

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