OneToOne 和 ManyToOne 的 TypeORM 循环依赖

Question

I've got these two entities related to each other:

@Entity()
export class Message {

    // ... other columns ...

    @OneToMany(() => Action, action => action.message, { eager: true, cascade: true })
    public actions: Action[];
}

@Entity()
export class Action {

    // ... other columns ...

    @ManyToOne(() => Message, message => message.actions, { nullable: false })
    public message?: Message;
}

But I want to record on the message entity when the user takes an action. I try adding an extra relation to the message like this:

@Entity()
export class Message {

    // ... other columns ...

    @OneToMany(() => Action, action => action.message, { eager: true, cascade: true })
    public actions: Action[];

    @OneToOne(() => Action, { nullable: true })
    @JoinColumn()
    public action_taken: Action;
}

But when trying to save a new message with the actions relation populated (trying to save them all at once with cascade: true ), then I get the following error:

TypeORMError: Cyclic dependency: "Action"
    at new TypeORMError (/app/node_modules/typeorm/error/TypeORMError.js:9:28)
    at visit (/app/node_modules/typeorm/persistence/SubjectTopoligicalSorter.js:144:23)
    at visit (/app/node_modules/typeorm/persistence/SubjectTopoligicalSorter.js:160:21)
    at visit (/app/node_modules/typeorm/persistence/SubjectTopoligicalSorter.js:160:21)
    at SubjectTopoligicalSorter.toposort (/app/node_modules/typeorm/persistence/SubjectTopoligicalSorter.js:139:17)
    at SubjectTopoligicalSorter.sort (/app/node_modules/typeorm/persistence/SubjectTopoligicalSorter.js:53:45)
    at SubjectExecutor.<anonymous> (/app/node_modules/typeorm/persistence/SubjectExecutor.js:99:124)
    at step (/app/node_modules/tslib/tslib.js:143:27)
    at Object.next (/app/node_modules/tslib/tslib.js:124:57)
    at /app/node_modules/tslib/tslib.js:117:75

Setting cascade: false doesn't throw the error, but then it also doesn't save the related records.

What am I missing? Is there a way I can still have cascade: true and have a double relation to an entity? Or will I have to manually save the related records?

Answer 1

Had this issue, working fine on nest CLI but give issues using serverless and webpack. Typeorm does not work well with webpack. I used repository.save (entity) and always failed with cyclic dependency.

After switching to

repository.createQueryBuilder()
.insert()
.values(data)
.execute();

This error has been cleared. I really recommend trying to change the repository method, because the save() method waits for the full entity set and createQueryBuilder() takes the entity values and turns them into string values, making a normal query.

Answer 2

Had this problem, in a @ManyToOne @OneToMany relationship, It can be solved by removing the side of the relationship that is without cascade . The error goes away, and the cascade works.