Posted an example [1]. fileField is unique in two ways: it doesn't accept a default value, and it only works with POST (i.e. %form!method=POST). If you submit the form via GET, the fileField will cause the form to fail, which I assume is what you're experiencing. I'll make a note to describe this in the docs. Hope this helps, -matt [1] https://gist.github.com/763039 2011/1/2 Knut Olav Bøhmer :

Hi,

Can anyone help me extend the "Random bananas" example from http://docs.yesodweb.com/book/forms/ to include a fileField, so that I can understand how to use the fileField.

I have tried something like this:

data Params = Params    { minNumber :: Int    , maxNumber :: Int    , singleWord :: String    , pluralWord :: String    , fileTest :: FileInfo    }

paramsFormlet :: Maybe Params -> Form s m Params -- Same as: paramsFormlet :: Formlet s m Params paramsFormlet mparams = fieldsToTable $ Params    <$> intField "Minimum number" (fmap minNumber mparams)    <*> intField "Maximum number" (fmap maxNumber mparams)    <*> stringField "Single word" (fmap singleWord mparams)    <*> stringField "Plural word" (fmap pluralWord mparams)    <*> fileField  "test" (fmap fileTest mparams)

I have problems understanding what's going on here.

Regards -- Knut Olav Bøhmer

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