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JSON: Support [JsonStringEnumConverter]

See original GitHub issue

System.Text.Json has [JsonStringEnumConverter], which maps CLR enums to strings in the JSON document.

I’m not sure if we plan to support arbitrary EF value converters for JSON properties (we should probably open an issue for that). If we do, then we could set up the appropriate enum/string converter when we see this attribute.

Originally requested for Npgsql by @sergeyshaykhullin in https://github.com/npgsql/efcore.pg/issues/2325

Issue Analytics

  • State:open
  • Created a year ago
  • Reactions:3
  • Comments:6 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
sergeyshaykhullincommented, Apr 19, 2022

@roji I think that enum property with .HasConversion<string>() should also translate to CAST(p.barcode->>'type' AS text)

0reactions
ajcvickerscommented, Oct 26, 2022

Notes from triage:

  • Enums are stored as strings by default in JSON documents. This is because the type mapping uses EnumToStringConverter by default.
  • Enums can be stored as numbers by configuring the enum-to-number converter instead.
  • An attribute for changing the value converter could be useful here: https://github.com/dotnet/efcore/issues/29426
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