What are Flask-WTF validators and how do I use them?
An example of an AI chatbot conversation about Flask-WTF validators for form validation in web apps.
What are Flask-WTF validators and how do I use them?
Flask-WTF validators are tools used in Flask applications to validate form data. They help ensure that user input meets certain criteria before processing.
Can you give me an example of a validator?
Sure! One common validator is the DataRequired validator, which checks if a field is not empty. You can use it like this: your_field = StringField('Your Field', validators=[DataRequired()]).
What happens if the validation fails?
If validation fails, Flask-WTF will prevent the form from being submitted and will provide error messages that you can display to the user.
How can I customize the error messages?
You can customize error messages by passing a message parameter to the validator, like this: DataRequired(message='This field is required.').
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