TypeError: Cannot read property 'joinColumns' of undefined

Issue type:

[ ] question [x] bug report [ ] feature request [ ] documentation issue

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [x] postgres [ ] sqlite [ ] sqljs [ ] react-native

TypeORM version:

[ ] latest [ ] @next [x] 0.2.0 (or put your version here)

Steps to reproduce or a small repository showing the problem: Entities:

@Entity()
export class DatasourceAction {

    @PrimaryGeneratedColumn()
    id: string;

    @Column({ name: 'name', type: 'text' })
    name: string;

    @Column({ name: 'action', type: 'text' })
    action: string;

    @Column({ name: 'id_datasource', type: 'varchar' })
    datasourceId: string;

    @ManyToOne(type => Datasource)
    @JoinColumn({ name: 'id_datasource' })
    datasource: Datasource;
}

@Entity('datasource')
export class Datasource {
    @PrimaryColumn()
    id: string;

    @Column({ name: 'status', type: 'text', default: 'none' })
    status: string;

    @Column({ name: 'electorate_size', type: 'int4', default: 0 })
    electorateSize: number;

    @OneToMany(type => DatasourceAction, datasourceAction => datasourceAction.datasourceId, {
        cascade: true
    })
    actions: Array<DatasourceAction>;
}

Query:

const dRepo = connection.getRepository(Datasource);
    const datasource = await dRepo.save({
      id: '11',
      status: 'none',
      electorateSize: 101,
      actions: [
        {
          id: '5',
          name: 'action one',
          action: 'add',
          datasourceId: '11',
        }
      ]
    });

If I do the dRepo.save for the first time, it inserts the entries into DB. But when I use the same object and call dRepo.save for the second time to update, it throws the below error.

Stack trace:

(node:94008) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'joinColumns' of undefined
    at RelationIdLoader.<anonymous> (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/src/query-builder/relation-id/RelationIdLoader.ts:62:70)
    at step (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/node_modules/typeorm/query-builder/relation-id/RelationIdLoader.js:32:23)
    at Object.next (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/node_modules/typeorm/query-builder/relation-id/RelationIdLoader.js:13:53)
    at /Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/node_modules/typeorm/query-builder/relation-id/RelationIdLoader.js:7:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/node_modules/typeorm/query-builder/relation-id/RelationIdLoader.js:3:12)
    at /Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/src/query-builder/relation-id/RelationIdLoader.ts:26:76
    at Array.map (<anonymous>)
    at RelationIdLoader.<anonymous> (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/src/query-builder/relation-id/RelationIdLoader.ts:26:52)
    at step (/Users/pavanbahuguni/practice/nest/typeorm/node-ts-graphql-boilerplate/node_modules/typeorm/query-builder/relation-id/RelationIdLoader.js:32:23)
(node:94008) 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 handledwith .catch(). (rejection id: 3)

[pleerock]

@PavanBahuguni please read docs carefully about how to create bi-directional relations. THIS DOES NOT HAVE INVERSE SIDE:

@ManyToOne(type => Datasource)
    @JoinColumn({ name: 'id_datasource' })
    datasource: Datasource;

what it should be is:

@ManyToOne(type => Datasource, datasource => datasource. actions)
    @JoinColumn({ name: 'id_datasource' })
    datasource: Datasource;

[pleerock]

your datasource relation missing inverse side. You need to specify to point to actions