@nestjs/graphql
Version:
Nest - modern, fast, powerful node.js web framework (@graphql)
51 lines (50 loc) • 2.35 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UnionDefinitionFactory = void 0;
const tslib_1 = require("tslib");
const common_1 = require("@nestjs/common");
const graphql_1 = require("graphql");
const return_type_cannot_be_resolved_error_1 = require("../errors/return-type-cannot-be-resolved.error");
const type_definitions_storage_1 = require("../storages/type-definitions.storage");
const resolve_type_factory_1 = require("./resolve-type.factory");
let UnionDefinitionFactory = exports.UnionDefinitionFactory = class UnionDefinitionFactory {
constructor(resolveTypeFactory, typeDefinitionsStorage) {
this.resolveTypeFactory = resolveTypeFactory;
this.typeDefinitionsStorage = typeDefinitionsStorage;
}
create(metadata) {
const getObjectType = (item) => this.typeDefinitionsStorage.getObjectTypeByTarget(item).type;
const types = () => metadata.typesFn().map((item) => getObjectType(item));
return {
id: metadata.id,
type: new graphql_1.GraphQLUnionType({
name: metadata.name,
description: metadata.description,
types,
resolveType: this.createResolveTypeFn(metadata),
}),
};
}
createResolveTypeFn(metadata) {
return metadata.resolveType
? this.resolveTypeFactory.getResolveTypeFunction(metadata.resolveType)
: (instance) => {
const target = metadata
.typesFn()
.find((Type) => instance instanceof Type);
if (!target) {
if (Reflect.has(instance, '__typename')) {
return instance.__typename;
}
throw new return_type_cannot_be_resolved_error_1.ReturnTypeCannotBeResolvedError(metadata.name);
}
const objectDef = this.typeDefinitionsStorage.getObjectTypeByTarget(target);
return objectDef.type?.name;
};
}
};
exports.UnionDefinitionFactory = UnionDefinitionFactory = tslib_1.__decorate([
(0, common_1.Injectable)(),
tslib_1.__metadata("design:paramtypes", [resolve_type_factory_1.ResolveTypeFactory,
type_definitions_storage_1.TypeDefinitionsStorage])
], UnionDefinitionFactory);