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GraphQL–DotNet - The type: Guid cannot be coerced effectively to a GraphQL type

I’m spending a lot (read: “waaay to many”) time learning GraphQL. One of the things I had to figure out was how to use Guids inside my GraphQL schema.

On one of my projects we are using Guids. Here is the mapping I tried to use:

When loading my GraphQL endpoint this resulted in the following error message:

The type: Guid cannot be coerced effectively to a GraphQL type

To fix it I had to explicitly specify the FieldType as IdType:

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