lookupPostParam returns always Nothing

141 Views Asked by Adrian V. At 19 April 2025 at 00:43

In the Home.hs handler from the yesod-simple scaffold I added these lines to postHomeR:

fileDescriptionMaybe <- lookupPostParam "fileDescription"
let result = fromMaybe "(empty)" fileDescriptionMaybe

Then in the homepage.hamlet template I use this result with the variable interpolation '#{result}'.

However the result is always "(empty)". How can I solve this?

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