nestjs目录命名导致的循环引用

Ruonorth2024-09-04 18:38

具体报错如下：

bash 复制代码

[Nest] 2024  - 2024/09/02 22:57:02   ERROR [ExceptionHandler] A circular dependency has been detected inside ApplicationModule. Please, make sure that each side of a bidirectional relationships are decorated with "forwardRef()". Note that circular relationships between custom providers (e.g., factories) are not supported since functions cannot be called more than once.
Error: A circular dependency has been detected inside ApplicationModule. Please, make sure that each side of a bidirectional relationships are decorated with "forwardRef()". Note that circular relationships between custom providers (e.g., factories) are not supported since functions cannot be called more than once.

复现方式：尽管U8AppService全是空方法仍然会出现循环引用的报错

typescript 复制代码

import { App } from "@/entities/app.entity";
import { TypeOrmModule } from "@hg/born-typeorm";
import { Module, Injectable } from "@hg/born/common";
import { ApplicationController } from "./controller";
import { U8AppService } from "./Service";

@Module({
    imports: [TypeOrmModule.forFeature([App])],
    controllers: [ApplicationController],
    providers: [U8AppService],
    exports: [U8AppService],
})
export class ApplicationModule { }

修改方法：将目录名从Service改为base就正常了

typescript 复制代码

import { App } from "@/entities/app.entity";
import { TypeOrmModule } from "@hg/born-typeorm";
import { Module, Injectable } from "@hg/born/common";
import { ApplicationController } from "./controller";
import { U8AppService } from "./base";

@Module({
    imports: [TypeOrmModule.forFeature([App])],
    controllers: [ApplicationController],
    providers: [U8AppService],
    exports: [U8AppService],
})
export class ApplicationModule { }

猜测nestjs在进行目录解析的时候进行了一些独特的处理导致有的命名无法正常解析