GHC 10.0.0.20260917 · lts/ghc-10.0.x · 77a8662 · 2026-10-31
Moduleyesod-form-1.7.11Haskell2010
Provides for getting input from either GET or POST params without generating HTML forms. For more information, see: http://www.yesodweb.com/book/forms#forms_kinds_of_forms.
Type for a form which parses a value of type a with the base monad m
(usually your Handler). Can compose this using its Applicative instance.
FormInputunFormInput :: HandlerSite m -> [Text] -> Env -> FileEnv -> m (Either DText a)Run a FormInput on the GET parameters (i.e., query string). If parsing
fails, calls invalidArgs.
Run a FormInput on the GET parameters (i.e., query string). Does not
throw exceptions on failure.
Since 1.4.1
Run a FormInput on the POST parameters (i.e., request body). If parsing
fails, calls invalidArgs.
Run a FormInput on the POST parameters (i.e., request body). Does not
throw exceptions on failure.
ireq :: (Monad m, RenderMessage (HandlerSite m) FormMessage)=> Field m a-> Textname of the field
-> FormInput m aPromote a Field into a FormInput, requiring that the value be present
and valid.
Promote a Field into a FormInput, with its presence being optional. If
the value is present but does not parse correctly, the form will still fail.