this.connection.getMetadata不是函数

Question

我有一个基本的graphql解析器，看起来像这样：

import { ClassType, Resolver, Query, UseMiddleware, Mutation, Arg } from 'type-graphql';
import { InjectRepository, OrmManager } from 'typeorm-typedi-extensions';
import { EntityManager } from 'typeorm';
import 'reflect-metadata';
// import { Repository } from 'typeorm';
function baseResolver<
T extends ClassType,
X extends ClassType,
P extends ClassType
>(
suffix: string,
returnType: T,
inputType: X,
repository: any,
updateType?: P
): any {
@Resolver({ isAbstract: true })
abstract class BaseResolver {
protected repo: any;
constructor(@OrmManager() protected entityManager: EntityManager) {
this.repo = entityManager.getCustomRepository(repository);
}
@Query(() => [returnType], { name: `getAll${suffix}` })
async getAll(): Promise<T[]> {
return this.repo.find();
}
@Mutation(() => returnType, { name: `create${suffix}` })
async create(@Arg('data', () => inputType) data: any): Promise<T> {
const result = this.repo.create(data).save();
return result;
}
@Mutation(() => Boolean, { name: `update${suffix}` })
async update(@Arg('data', () => updateType) data: any) {
await this.repo.update(data.id, data);
return true;
}
@Mutation(() => Boolean, { name: `delete${suffix}` })
async delete(@Arg('id') id: string) {
await this.repo.softDelete(id);
}
}
return BaseResolver;
}
export default baseResolver;

然后，我在其他子代解析器中扩展解析器。当我尝试运行这个时，我得到了以下错误(由构造函数抛出(：

"TypeError: this.connection.getMetadata is not a function",

有人能帮忙吗？此代码可能有什么问题？

Answer 1

试试这个：

npm install 'reflect-metadata' -D

将其添加到您的tsconfig.json:

"compilerOptions": {
"types": ["reflect-metadata"],
"experimentalDecorators": true

重新启动VS代码