graphile-build
Version:
Build a GraphQL schema from plugins
68 lines • 2.8 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MutationPlugin = void 0;
require("graphile-config");
const grafast_1 = require("grafast");
const utils_ts_1 = require("../utils.js");
const version_ts_1 = require("../version.js");
/**
* This plugin registers the operation type for the 'mutation' operation, and
* if that type adds at least one field then it will be added to the GraphQL
* schema.
*
* By default we call this type `Mutation`, but you can rename it using the
* `builtin` inflector.
*
* Removing this plugin will mean that your GraphQL schema will not allow
* mutation operations.
*/
exports.MutationPlugin = {
name: "MutationPlugin",
description: "Adds the 'Mutation' type to the GraphQL schema",
version: version_ts_1.version,
schema: {
hooks: {
init: {
callback: (_, build, _context) => {
const { inflection } = build;
build.registerObjectType(inflection.builtin("Mutation"), {
isRootMutation: true,
}, () => ({
assertStep: grafast_1.__ValueStep,
description: "The root mutation type which contains root level fields which mutate data.",
}), `graphile-build built-in (root mutation type)`);
return _;
},
},
GraphQLSchema: {
callback: (schema, build, _context) => {
const { getTypeByName, extend, inflection, handleRecoverableError } = build;
// IIFE to get the mutation type, handling errors occurring during
// validation.
const Mutation = (() => {
try {
const Type = getTypeByName(inflection.builtin("Mutation"));
if ((0, utils_ts_1.isValidObjectType)(Type)) {
return Type;
}
}
catch (e) {
handleRecoverableError(e);
}
return null;
})();
if (Mutation == null) {
return schema;
}
// Errors thrown here (e.g. due to naming conflicts) should be raised,
// hence this is outside of the IIFE.
return extend(schema, { mutation: Mutation }, "Adding mutation type to schema");
},
provides: ["Mutation"],
before: [],
after: ["Query"],
},
},
},
};
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