We need to use Text and decode it in the action. We w

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Maybe enumParamReader can help us here? <div class="Box Box--con

Use Enum types as route params about ihp HOT 3 OPEN

amitaibu commented on June 2, 2024

Use Enum types as route params

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Comments (3)

s0kil commented on June 2, 2024

@mpscholten Is this even possible? Not sure if we can check if our custom Enum types are an instance of Enum type class in the routing code.

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mpscholten commented on June 2, 2024

I don't have any ideas how this can be implemented right now, but I assume there's a way to get this working

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amitaibu commented on June 2, 2024

Maybe enumParamReader can help us here?

ihp/IHP/Controller/Param.hs

Lines 556 to 566 in a95e837

    
           -- | Can be used as a default implementation for 'readParameter' for enum structures 
        
           -- 
        
           -- __Example:__ 
        
           -- 
        
           -- > data Color = Yellow | Red | Blue deriving (Enum) 
        
           -- > 
        
           -- > instance ParamReader Color where 
        
           -- >     readParameter = enumParamReader 
        
           -- >     readParameterJSON = enumParamReaderJSON 
        
           enumParamReader :: forall parameter. (Enum parameter, ModelSupport.InputValue parameter) => ByteString -> Either ByteString parameter 
        
           enumParamReader string =

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Use Enum types as route params about ihp HOT 3 OPEN

Comments (3)

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	-- \| Can be used as a default implementation for 'readParameter' for enum structures
	--
	-- __Example:__
	--
	-- > data Color = Yellow \| Red \| Blue deriving (Enum)
	-- >
	-- > instance ParamReader Color where
	-- > readParameter = enumParamReader
	-- > readParameterJSON = enumParamReaderJSON
	enumParamReader :: forall parameter. (Enum parameter, ModelSupport.InputValue parameter) => ByteString -> Either ByteString parameter
	enumParamReader string =