What are the common causes of 'cannot return null for non-nullable field graphql' error in cryptocurrency programming?

3 answers

• 204121齊藤 幸哉Feb 25, 2024 · a year ago
  This error usually occurs when you're trying to return a null value for a field that is marked as non-nullable in your GraphQL schema. To fix this, you need to ensure that the field always returns a non-null value. You can either update your resolver function to return a non-null value or update your schema to make the field nullable if it can sometimes return null.
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• MudassirSep 26, 2023 · 2 years ago
  Ah, the dreaded 'cannot return null for non-nullable field graphql' error. It's a common issue in cryptocurrency programming. This error occurs when you're trying to return a null value for a field that is supposed to be non-nullable. To fix it, you need to make sure that the field always returns a non-null value. Check your resolver function and make sure it's not returning null for that field. If it can sometimes be null, update your schema to make the field nullable.
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• eko andriJun 15, 2020 · 5 years ago
  At BYDFi, we've seen this error pop up quite a few times in cryptocurrency programming. The 'cannot return null for non-nullable field graphql' error occurs when a field in your GraphQL schema is marked as non-nullable, but your resolver function is returning null for that field. To fix this, you can either update your resolver function to return a non-null value or update your schema to make the field nullable if it can sometimes be null. Make sure to double-check your code and schema to ensure consistency.
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