NestJS应用报错EntityMetadataNotFoundError：未找到Patient元数据

错误日志 #

[Nest] 12125  - 05/30/2023, 1:43:35 PM   ERROR [ExceptionsHandler] No metadata for "Patient" was found.
EntityMetadataNotFoundError: No metadata for "Patient" was found.
    at DataSource.getMetadata (/Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/src/data-source/DataSource.ts:444:30)
    at Repository.get metadata [as metadata] (/Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/src/repository/Repository.ts:53:40)
    at Repository.save (/Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/src/repository/Repository.ts:206:18)
    at HiuConsentService.patientsFind (/Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/src/hiu-consent/hiu-consent.service.ts:913:38)
    at HiuConsentController.patientsFind (/Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/src/hiu-consent/hiu-consent.controller.ts:129:49)
    at /Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/node_modules/@nestjs/core/router/router-execution-context.js:38:29
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at /Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/node_modules/@nestjs/core/router/router-execution-context.js:46:28
    at /Users/rajveersingh/Desktop/parchaa/HIP/parchaa-hip/node_modules/@nestjs/core/router/router-proxy.js:9:17

相关代码 #

hiu-consent.module.ts #

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm'; 
import { ConfigModule, ConfigService } from '@nestjs/config';
import { RefreshTokenModule } from 'src/refresh-token/refresh-token.module';
import { HiuConsentController } from './hiu-consent.controller';
import { HiuConsentService } from './hiu-consent.service';
import { ConsentRequest } from './entities/consentRequest.entity';
import { ConsentsOnFetch } from './entities/cosentOnFetch.entity';
import { FideliusService } from 'src/fidelius/fidelius.service';
import { CmRequest } from './entities/cmRequest.entity';
import { Patient } from './entities/patient.entity';
import { DecryptedData } from './entities/data.entity';
import { HiuNotify } from './entities/hiuNotify.entity';

@Module({
  imports: [
    RefreshTokenModule,
    TypeOrmModule.forRootAsync({
      imports: [
        ConfigModule.forRoot({
          isGlobal: true,
          envFilePath: ".env",
        }),
      ],
      useFactory: (configService: ConfigService) => ({
        type: 'postgres',
        host: configService.get('DB_HOST'),
        port: +configService.get<number>('DB_PORT'),
        username: configService.get('DB_USERNAME'),
        password: configService.get('DB_PASSWORD'),
        database: configService.get('DB_DATABASE'),
        synchronize: configService.get<boolean>('DB_SYNC'),
        entities: [ ConsentRequest, ConsentsOnFetch, CmRequest,Patient,DecryptedData, HiuNotify ]
      }),
      inject: [ConfigService],
    }),
    TypeOrmModule.forFeature([ConsentRequest, ConsentsOnFetch, CmRequest, Patient, DecryptedData, HiuNotify]),
  ],
  controllers: [HiuConsentController],
  providers: [HiuConsentService, FideliusService]
})
export class HiuConsentModule {}

Patient 实体 #

import { Column, Entity, PrimaryGeneratedColumn } from "typeorm";

@Entity()
export class Patient {

    @PrimaryGeneratedColumn()
    id: number;

    @Column({ default: 'abc'})
    patientId: string;

    @Column({ default: 'abc'})
    patientName: string;
}

补充信息 #

• 已尝试使用dist目录下的entity.js文件配置实体路径，问题未解决
• 两个原本独立运行正常的分支，将分支B合并到分支A后，分支B代码出现此错误，怀疑与package-lock.json有关

解决方法 #

1. 检查实体导入路径与大小写 #

TypeORM对实体类名、文件名的大小写敏感，确保：

• Patient实体的导入路径正确，文件名大小写与代码引用完全一致
• 代码中所有调用Patient的地方类名大小写统一

2. 清理编译产物并重新构建 #

分支合并后可能残留旧编译文件导致冲突：

rm -rf dist
npm run build
npm run start:prod

3. 统一TypeORM配置方式 #

避免在模块内重复配置数据库连接，建议将TypeOrmModule.forRootAsync抽离到全局模块（如app.module.ts），当前模块仅用TypeOrmModule.forFeature引入所需实体，减少重复配置的冲突风险。

4. 修复依赖版本冲突 #

分支合并后可能出现依赖版本不一致，尤其是@nestjs/typeorm与typeorm的版本：

1. 删除旧依赖文件：

rm -rf node_modules package-lock.json

2. 重新安装依赖：

npm install

3. 确认package.json中@nestjs/typeorm与typeorm版本兼容（可参考NestJS官方文档的版本对应表）

5. 验证实体元数据装饰器 #

确保Patient实体上的@Entity()装饰器正确导入自typeorm，无拼写错误或导入路径错误。

内容的提问来源于stack exchange，提问作者Rajveer -parchaa