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Usability: Transmute error message not providing enough context #143

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charleso opened this issue Jan 22, 2018 · 0 comments

charleso commented Jan 22, 2018

From the following error it's hard to determine what column is at fault

error: Cannot transmute column from actual schema to desired schema:

 actual =
    Enum
      AllowDefault
      [ Variant "none" Unit
      , Variant "some" (Nested (Binary DenyDefault Utf8))
      ]

  desired =
    Nested (Binary DenyDefault Utf8)

https://github.com/ambiata/zebra/blob/b2423ea01597c580e3fb2e0a5bcf7060ba641dcb/zebra-core/src/Zebra/Table/Striped.hs#L195

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