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GraphQLSwift / Graphiti

The Swift GraphQL Schema framework for macOS and Linux
MIT License
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Can't validate request #68

Open itayAmza opened 2 years ago

itayAmza commented 2 years ago

Following Vapor's Validation API, I'm not really sure what is the right way to validate arguments in Graffiti. I've made the arguments struct conform to Validatable but since I cannot call validate before it's being decode, I'm always getting 'field is required' error.

NeedleInAJayStack commented 2 years ago

Hey @itayAmza, I don't think there's a good way to call validate(_ decoder: Decoder) before decode, since fields automatically define the decode block here: https://github.com/GraphQLSwift/Graphiti/blob/af903a243862c6427935677b91f67df0c21f2a71/Sources/Graphiti/Field/Field/Field.swift#L55

I think you have a few options:

  1. Code your own after-the-fact validation and place the logic in your resolver function, throwing errors when it fails
  2. Drop down into https://github.com/GraphQLSwift/GraphQL, where you have full control over argument decoding in the resolvers

Hope that helps!