GraphQL para Iniciantes: Guia Completo com .NET
Introdução GraphQL é uma linguagem de consulta para APIs e um runtime que executa essas consultas sobre um schema tipado. Em vez de receber sempre uma representação fixa de um recurso, o cliente descreve os campos de que precisa; o servidor valida a operação, chama os resolvers responsáveis e devolve um JSON com aquele formato. Eu consideraria GraphQL quando diferentes clientes precisam de…
GraphQL is a query language for APIs and a runtime that executes these queries using a schema. It allows clients to request exactly the data they need and receive it in a JSON format. This can be particularly useful when different clients require different combinations of data or when a screen depends on related information that would otherwise require multiple calls.
However, this flexibility does not automatically make GraphQL faster, smaller, or simpler than REST; it shifts some of the work to the schema and resolvers. The client chooses the fields, but the server still handles authorization, validation, query limits, pagination, and efficient data access. If not controlled properly, a query can still make the backend perform unnecessary work.
This guide explains GraphQL's schema, types, queries, mutations, and resolvers, and demonstrates an executable implementation using GraphQL.NET in ASP.NET Core/.NET 10. It also compares this approach to a REST endpoint, and outlines what a production API would need to add. The sample tested uses GraphQL.NET 8.8.5, GraphQL.Server.Transports.AspNetCore 8.3.3, and .NET SDK 10.0.402.
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