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    When and Why to use Nullable vs Non-nullable Fields in GraphQL

    graphqlGraphQL

    In GraphQL every field is nullable by default. While not ideal for the developer experience when consuming a GraphQL Schema with a client, this was a conscious decision by the creators of GraphQL.

    In this lesson we explore the background for this decision which will cover the following areas:

    • Error handling
    • Authorization
    • Deprecations during Schema Migrations