找不到 Role#users 的实体元数据 [英] Entity metadata for Role#users was not found

问题描述

试图使 OneToMany 和 ManyToOne 与 TypeORM 建立关系，但出现此错误，我不知道我的代码有什么问题.

Trying to make OneToMany and ManyToOne relationship with TypeORM but I get this error, I don't know what's wrong with my code.

我有以下用户实体:

import { BaseEntity, Column, Entity, ManyToOne, PrimaryGeneratedColumn } from 'typeorm';
import { Field, ID, ObjectType } from 'type-graphql';

import { Role } from './';

@ObjectType()
@Entity()
export class User extends BaseEntity {
  @Field(() => ID)
  @PrimaryGeneratedColumn()
  public id: number;

  @Field()
  @Column('text', { unique: true })
  public userName: string;

  @Column()
  public password: string;

  @Field()
  @Column('boolean', { default: true })
  public isActive: boolean;

  @ManyToOne(() => Role, role => role.users)
  @Field(() => Role, { nullable: true })
  public role: Role;
}

角色实体:

import { BaseEntity, Column, Entity, OneToMany, PrimaryGeneratedColumn } from 'typeorm';
import { Field, ID, ObjectType } from 'type-graphql';

import { User } from '.';

@ObjectType()
@Entity()
export class Role extends BaseEntity {
  @Field(() => ID)
  @PrimaryGeneratedColumn()
  public id: number;

  @Field()
  @Column('text', { unique: true })
  public name: string;

  @OneToMany(() => User, user => user.role, { lazy: false })
  @Field(() => [User], { nullable: true })
  public users: User[];
}

但是我一直收到这个错误

However I keep getting this error

(node:4541) UnhandledPromiseRejectionWarning: Error: Entity metadata
for Role#users was not found. Check if you specified a correct entity
object and if it's connected in the connection options. [1]     at
/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:571:23
[1]     at Array.forEach (<anonymous>) [1]     at
EntityMetadataBuilder.computeInverseProperties
(/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:567:34)
[1]     at
/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:80:74
[1]     at Array.forEach (<anonymous>) [1]     at
EntityMetadataBuilder.build
(/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:80:25)
[1]     at ConnectionMetadataBuilder.buildEntityMetadatas
(/node_modules/typeorm/connection/ConnectionMetadataBuilder.js:57:141)
[1]     at Connection.buildMetadatas
(/node_modules/typeorm/connection/Connection.js:494:57)
[1]     at Connection.<anonymous>
(/node_modules/typeorm/connection/Connection.js:126:30)
[1]     at step
(/node_modules/tslib/tslib.js:136:27) [1]
(node:4541) UnhandledPromiseRejectionWarning: Unhandled promise
rejection. This error originated either by throwing inside of an async
function without a catch block, or by rejecting a promise which was
not handled with .catch(). (rejection id: 1) [1] (node:4541) [DEP0018]
DeprecationWarning: Unhandled promise rejections are deprecated. In
the future, promise rejections that are not handled will terminate the
Node.js process with a non-zero exit code.

推荐答案

我正在将 NestJS 与 PostgreSQL 一起使用，并且我有同样的问题.我的问题是我忘记使用 TypeOrmModule.forFeature 函数在模块中导入实体.

I am using NestJS with PostgreSQL and I had the same issue. The problem was by me is that I forgot to import the entity in the module with the TypeOrmModule.forFeature function.

@Module({
  imports: [TypeOrmModule.forFeature([Users, ...])],  <--- Importing the entity!
  controllers: [...],
  providers: [...],
  exports: [...],
})

这篇关于找不到 Role#users 的实体元数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！