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Monthly Downloads: 383
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Data     Generic    
Latest version: v0.2.0.9

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README

generic-aeson

Build Status

The structure of the generated JSON is meant to be close to idiomatic JSON. This means:

  • Enumerations (data types containing constructors without fields) are converted to JSON strings.

  • Record fields become JSON keys.

  • Data types with one unlabeled field convert to just that field.

  • Data types with multiple unlabeled fields become arrays.

  • Multiple constructors are represented by keys.

  • Maybe values are either an absent key, or the value.

  • Leading and trailing underscores are removed from constructor names and record fields

See tests/Main.hs in json-schema for more examples.

How does generic-aeson compare to the TH/Generics already present in aeson?

generic-aeson contains more special cases for creating more concise and idiomatic json. If you're working with the JSON representation directly generic-aeson should feel more natural.

Will the generated format ever change?

Changing the format would incur a breaking change to every API that uses generic-aeson so we must keep it intact.

If we find a bug where the fix changes the format we need to create a new package or version the generation code.

Schemas

json-schema has generic derivation of schemas that match the generic-aeson format.