Add a BooleanRequired validator for use with BooleanField

[alswl]

provide BooleanRequired for BooleanField

idea from: https://code.luasoftware.com/tutorials/python/wtforms-booleanfield-value-and-validation/

[alswl]

WIP

[ftm]

Can you explain the purpose of this because at the moment I'm struggling to see one.

The article you link says that BooleanField does not accept False as a false value, when it does and has done since January 2018 (one month before the article was released) although admittedly it looks like the docs were not updated when that change was made (Edit: I have since updated the docs, #485).

From what I can see your validator then attempts to fix this non-issue by ensuring the raw data can only be True or False which defeats the whole point of accepting a range of false values (i.e. not just True or False).

Additionally you have not written any tests for the validator.

[ftm]

As there has been no response, I am closing this.