validation - Flask-WTF : How to allow zero upon DataRequired() validation

Question

我已经定义了这样的形式:

class RecordForm(Form):
    rating = IntegerField('Rating')

如果未插入任何值，则会显示如下默认消息:

Not a valid integer value

我想有一个自定义消息，所以我想到了这个:

class RecordForm(Form):
    rating = IntegerField('Rating',[validators.DataRequired("Helllo???")])

自定义消息现在可以使用，但是有副作用。 0(零)不再被接受为整数值。请问我在这里有什么选择？

Answer 1

使用 InputRequired 代替:

class RecordForm(Form):
    rating = IntegerField('Rating',[validators.InputRequired("You got to enter some rating!")])

从文档中:

Note there is a distinction between this and DataRequired in that InputRequired looks that form-input data was provided, and DataRequired looks at the post-coercion data.

(强调我的)