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GraphQL is a query language for APIs and a server-side runtime. GraphQL is not tied to any particular database or storage engine. A GraphQL service is created by defining types and fields for those types, and then providing functions for each field. ...
Each GraphQL service defines a set of types that describe the set of possible data that you can query on that service. This set of types is called a GraphQL schema. Then, when requests come in, they are checked and executed according to this schema. ...
Validation The GraphQL type system allows you to validate a query for correctness before executing it. Here are some cases in which an error will be returned: A field is requested that is not contained in this type. An object is requested for which ...
Apollo Server is an open source, spec-compliant GraphQL server that is compatible with any GraphQL client. This tutorial assumes you are familiar with the command line, JavaScript, and MongoDB. Also you must have MongoDB database installed. Instructi...
