CODEWITHSUNDEEP
graphqlgraphql-java
Don_Quijote
Don_Quijote

Reputation: 1046

How to set null to field in graphql?

We use graphql on our project and use graphql-java 2.3.0 (we plan to update but it is not possible at the moment).

I'm trying to perform such mutation:

  mutation {
    UPDATE_User(

      id:3,
      type: null
    ) {id}
  }

Response:

{
  "errors": [
    {
      "validationErrorType": "WrongType",
      "message": "Validation error of type WrongType: argument value EnumValue{name='null'} has wrong type",
      "locations": [
        {
          "line": 5,
          "column": 7
        }
      ],
      "errorType": "ValidationError"
    }
  ],
  "data": null
}

Upvotes: 6

Views: 10683

Answers (2)

Eric Taix
Eric Taix

Reputation: 908

In your schema, is 'type' parameter required ?

If not then simply omit it ! On your backend when you will retrieve the value of typethen it will be null

Upvotes: 0

kaqqao
kaqqao

Reputation: 15499

Null keyword is a relatively new addition to the GraphQL spec, and the graphql-java version you're using doesn't yet have it implemented. In fact, even 3.0.0 still doesn't have it. The soon-to-be-released 4.0 will have support for the null keyword.
And the reason it is treated as an enum is because unquoted strings are normally enums, null being the only exception. This is also explained in this issue.

Upvotes: 3

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