What are WTForms validators and how do I use them?
An example of an AI chatbot conversation about WTForms validators for form validation in Python.
What are WTForms validators and how do I use them?
WTForms validators are functions that check the data entered in forms. They ensure that the data meets certain criteria before processing.
Can you give me an example of a common validator?
Sure! A common validator is the DataRequired validator, which checks that a field is not empty.
How do I implement the DataRequired validator in my form?
You can implement it by importing it from wtforms.validators and adding it to your field like this: field = StringField('Name', validators=[DataRequired()]).
What happens if the validation fails?
If validation fails, WTForms will raise a validation error, and you can display an error message to the user.
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