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index.ts
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index.ts
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import { GraphQLString, GraphQLSchema, GraphQLObjectType } from 'graphql/type';
import { ExecutionResult } from 'graphql/execution';
import { graphqlSync } from 'graphql';
interface SomeExtension {
number: number;
string: string;
}
const example: SomeExtension = {
number: 42,
string: 'Meaning of life',
};
// FIXME: The following code block requires a version of TypeScript >= 3.2
/*
declare module 'graphql' {
interface GraphQLObjectTypeExtensions<TSource = any, TContext = any> {
someObjectExtension?: SomeExtension;
}
interface GraphQLFieldExtensions<
TSource,
TContext,
TArgs = { [argName: string]: any }
> {
someFieldExtension?: SomeExtension;
}
interface GraphQLArgumentExtensions {
someArgumentExtension?: SomeExtension;
}
}
*/
const queryType: GraphQLObjectType = new GraphQLObjectType({
name: 'Query',
fields: {
sayHi: {
type: GraphQLString,
args: {
who: {
type: GraphQLString,
extensions: {
someArgumentExtension: example,
},
},
},
resolve: (_root, args) => 'Hello ' + (args.who || 'World'),
extensions: {
someFieldExtension: example,
},
},
},
extensions: {
someObjectExtension: example,
},
});
const schema: GraphQLSchema = new GraphQLSchema({
query: queryType,
});
const result: ExecutionResult = graphqlSync({
schema,
source: `
query helloWho($who: String){
test(who: $who)
}
`,
variableValues: { who: 'Dolly' },
});