what's the function of'@with_form_data'?

[ockan]

I code a form, and POST it, whether with or without '@with_form_data', all are OK.
what's the function of'@with_form_data'?

[miguelgrinberg]

This is used when using the "multipart" extension, which implements multipart forms (e.g. forms with file uploads). If you don't use multipart forms, then you do not need this extension, microdot handles regular forms just fine on its own.