如何在Flask-Admin中将字符串模型字段转换为选择输入？

Question

我的SQLAlchemy模型中有一个字符串字段,我想在Flask-Admin中显示一个带有几个选项的选择框,而不是标准文本字段.

class MyModel(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    my_field = db.Column(db.String(128))  # Field I would like to be choices


class MyModelView(ModelView):
    """
    Admin manager for MyModel
    """

    # Which option should I use here?

    def __init__(self):
        super(MyModelView, self).__init__(MyModel, db.session)

Answer 1

它结束了的组合form_overrides和form_args. form_overrides告诉表单使用选择字段并form_args允许您传递选项和其他选项.

class MyModel(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    my_field = db.Column(db.String(128))


class MyModelView(ModelView):
    """
    Admin manager for MyModel
    """

    form_overrides = dict(
        my_field=SelectField
    )
    form_args = dict(
        my_field=dict(
            choices=[
                ('choice_1', 'Choice 1'),
                ('choice_2', 'Choice 2')
            ]
        )
    )
    def __init__(self):
        super(MyModelView, self).__init__(MyModel, db.session)

Answer 2

您可以通过在模型视图中使用“form_choices”来实现此功能，以下示例基于问题中嵌入的代码说明：

   class MyModel(db.Model):
       id = db.Column(db.Integer, primary_key=True)
       my_field = db.Column(db.String(128))  # Field I would like to be choices


    class MyModelView(ModelView):
        """
        Admin manager for MyModel
        """

            form_choices = {
                 'my_field': [
                     ('choice_1', 'Choice 1'),
                     ('choice_2', 'Choice 2'),
                     ('choice_3', 'Choice 3'),
                     ('choice_4', 'Choice 4'),
                     ('choice_5', 'Choice 5')
                ]
           }

        def __init__(self):
            super(MyModelView, self).__init__(MyModel, db.session)

参考：

烧瓶管理文档：

您可以通过指定选择选项列表来限制文本字段的可能值：

form_choices = { 'title': [ ('MR', 'Mr'), ('MRS', 'Mrs'), ('MS', 'Ms'), ('DR', 'Dr'), ('教授', '教授') ] }