我正在尝试使用 NestJS 和 TypeORM 播种我的数据库。
我有一个创建exercise表的迁移文件和一个将一个ExerciseEntity插入表的种子文件。这些文件之间的主要区别在于迁移文件直接运行查询：
public async up(queryRunner: QueryRunner): Promise<any> {
await queryRunner.query(
`CREATE TABLE ...`
);
}
而种子文件获取存储库：
public async up(queryRunner: QueryRunner): Promise<any> {
await queryRunner.manager.getRepository<ExerciseEntity>(ExerciseEntity).save(
someExerciseEntity
);
}
这getRepository是造成错误的原因。
RepositoryNotFoundError: No repository for "ExerciseEntity" was found. Looks like this entity is not registered in current "default" connection?
at new RepositoryNotFoundError (C:\Users\Dev\Documents\team-management\src\error\RepositoryNotFoundError.ts:10:9)
at EntityManager.getRepository (C:\Users\Dev\Documents\team-management\src\entity-manager\EntityManager.ts:1194:19)
at SeedExercises1584903747780.<anonymous> (C:\Users\Dev\Documents\team-management\dist\apps\api\_seeds\dev\webpack:\_seeds\dev\1584903747780-SeedExercises.ts:7:31)
在一项服务中，我获得了存储库并毫无问题地保存了实体。该问题仅在播种时发生。
我注册 TypeORM 如下：
// app.module.ts
@Module({})
export class AppModule implements NestModule {
static forRoot(): DynamicModule {
return {
module: AppModule,
imports: [
ConfigModule.forRoot({
envFilePath: '.env.dev',
validationSchema: validationSchema()
}),
TypeOrmModule.forRootAsync({
imports: [ConfigModule],
inject: [ConfigService],
useFactory: async (configService: ConfigService) => databaseProviders(configService)
}),
ExercisesModule.forRoot()
]
};
}
}
在哪里：
// database.provider.ts
export const databaseProviders = (configService: ConfigService) => {
const normalizePath = (_path: string) => (path.normalize(path.join(__dirname, _path)));
const commonDB: TypeOrmModuleOptions = {
type: 'sqlite',
entities: [...exercisesEntities]
};
// exerciseEntities comes from an index.ts in an exercise library
// import { ExerciseEntity } from './exercise.entity';
// export const exercisesEntities = [ExerciseEntity];
const defaultDB: TypeOrmModuleOptions = {
...commonDB,
database: path.join(
configService.get('APP_ROOT_PATH', '.'),
configService.get('TYPEORM_DATABASE', 'gym-dev.sqlite')
),
logging: configService.get<boolean>('TYPEORM_ENABLE_LOGGING', true) ? ['query', 'error'] : [],
cache: true,
synchronize: configService.get<boolean>('TYPEORM_SYNCHRONIZE', false),
migrations: [normalizePath('_migrations/*.js'), normalizePath('_seeds/dev/*.js')],
migrationsRun: configService.get<boolean>('TYPEORM_MIGRATIONS_RUN', true),
dropSchema: configService.get<boolean>('DROP_SCHEMA', false)
};
return defaultDB;
};
我正在使用nrwl/nx以下 webpack 配置编译和提供应用程序：
module.exports = function(config, context) {
const baseDirectory = path.resolve(config.output.path);
const entityPaths = ['libs/feature/api/**/entities/*.js'];
const migrationPaths = ['_migrations/*.js', '_seeds/**/*.js'];
config.entry = {
...config.entry,
...getEntityEntries(entityPaths),
...getMigrationEntries(migrationPaths)
};
// getEntries functions allows the compilation of entities and migrations
// Output
config.output = {
path: baseDirectory,
filename: '[name].js',
libraryTarget: 'commonjs'
};
return config;
};
我的dist结构最终是：
dist
|-apps
|-api
|-_migrations // contains compiled migrations
|-_seeds // contains compiled seeders
|-lib
|-entities // contains compiled entities
|-main.js
如我所见，app.module.ts我正在使用TypeOrmModule.forRootAsync能够注入配置服务。我怀疑也许当播种者被执行时，存储库还没有注册。这将解释稍后，在运行 Web 应用程序时，服务可以访问存储库。
知道如何解决这个问题吗？
我的配置是错误的还是遗漏了什么？如果这是问题所在，播种机中有没有办法等待存储库被注册？
编辑：
它与TypeOrmModule.forRootAsync. 我做了以下更改：
// app.module.ts
@Module({})
export class AppModule implements NestModule {
static forRoot(): DynamicModule {
return {
module: AppModule,
imports: [
ConfigModule.forRoot({
envFilePath: '.env.dev',
validationSchema: validationSchema()
}),
TypeOrmModule.forRoot(databaseProvidersSync()),
ExercisesModule.forRoot()
]
};
}
}
// database.providers.ts
export const databaseProvidersSync = () => {
const normalizePath = (_path: string) => (path.normalize(path.join(__dirname, _path)));
const defaultDB: TypeOrmModuleOptions = {
type: 'sqlite',
entities: [...exercisesEntities],
database: path.normalize(`C:\\Users\\Dev\\Documents\\team-management\\gym-dev.sqlite`),
logging: ['query', 'error'],
cache: true,
synchronize: false,
migrations: [normalizePath('_migrations/*.js'), normalizePath('_seeds/dev/*.js')],
migrationsRun: true,
dropSchema: true
}
return defaultDB;
}
错误是一样的。