The example schema and resolvers for finding a planet that we discussed in the previous section presume that we use the GraphQL schema language, which helps us create the GraphQL schema required by the GraphQL server. We can easily create a GraphQL.js GraphQLSchema instance from the GraphQL schema language using the makeExecutableSchema function from a Node.js package called GraphQL Tools.
The GraphQL schema language is a "shortcut" – a shorthand notation for constructing your GraphQL schema and its type system. Before making use of this shorthand notation, we should take a look at how a GraphQL schema is built from the low-level objects and functions such as GraphQLObjectType, GraphQLString, GraphQLList, and so on from GraphQL.js, which implements the GraphQL specification. Let's install...
