[ERROR_HANDLING] How to get the specific missing field path when validation error occurs ?

[rmasclef]

What happened?

Hi !

I may have run into two possible issues regarding validation:

• validation does not seem to be done on inputs like [String!]!
• validation error does not contain the specific missing field

{
  "error": {
    "errors": [
      {
        "message": "must be defined",
        "path": [
          "variable",
          "createAdInput"
        ],
        "extensions": {
          "code": "GRAPHQL_VALIDATION_FAILED"
        }
      }
    ],
    "data": null
  }
}

What did you expect?

something like this:

{
  "error": {
    "errors": [
      {
        "message": "must be defined",
        "path": [
          "variable",
          "createAdInput.model"
        ],
        "extensions": {
          "code": "GRAPHQL_VALIDATION_FAILED"
        }
      },
      {
        "message": "must be defined",
        "path": [
          "variable",
          "createAdInput.picturesUrl[0]"
        ],
        "extensions": {
          "code": "GRAPHQL_VALIDATION_FAILED"
        }
      }
    ],
    "data": null
  }
}

Minimal graphql.schema and models to reproduce

shema.Mutation:

type Mutation {
    createAd(createAdInput: CreateAdInput!): ID

    # equivalent of an add-an-ad from ads-manager project (https://github.com/reezogit/ads_manager)
#    createAdByUrl(input: CreateAdByUrlInput!): ID
}

schema.Input:

input CreateAdInput {
    make: String! # ex: Peugeot
    model: String! # ex: 207
    version: String!
    isSmokerCar: Boolean
    picturesURLs: [String!]!
    ...
}

Request:

mutation CreateAd($createAdInput: CreateAdInput!) {
  createAd(createAdInput:$createAdInput)
}

Variables:

{
  "createAdWithBusinessErrorInput": {
    "make": "Peugeot",
    "version": "GT - PureTech 155 S&S",
    "picturesURLs": []
  }
}

versions

• gqlgen version? v0.13.0
• go version? v1.15.x
• dep or go modules? go modules + vendoring