Nested populate not working for mikro-orm - postgresql

Question

I'm using mikro-orm with nest.js, I have Users, Roles and Permissions entities. I need to select user by id with it's role and permissions from database. I'm using the following code to select user with everything:
this._userRepo.findOne({ $or: [{ email }] }, { populate: ['role', 'role.permissions'] })
I need the result to look like the following code example, but permissions are not selected:
{
id: 1,
email: 'john.doe#inter.net',
firstName: 'john',
lastName: 'Doe',
...
role: {
id: 21,
name: 'Moderator',
permissions: [
{ id: 1, name: 'Create' },
{ id: 2, name: 'Update' },
{ id: 3, name: 'Delete' },
]
}
}
Here's how my entities and schema looks like:
// user.entity.ts
#Entity({ tableName: 'users' })
export class UserEntity {
#PrimaryKey() id: number;
#Property() email: string;
#Property() firstName: string;
#Property() lastName: string;
...
#ManyToOne(() => RoleEntity) role: ref<RoleEntity, 'id'>;
constructor(role: RoleEntity) {
this.role = ref(role);
}
}
// role.entity.ts
#Entity({ tableName: 'roles' })
export class RoleEntity {
#PrimaryKey() id: number;
#Property() name: string;
...
#ManyToMany(() => PermissionEntity) permissions = new Collection<PermissionEntity>(this);
}
// permission.entity.ts
#Entity({ tableName: 'permissions' })
export class PermissionEntity {
#PrimaryKey() id: number;
#Property() name: string;
}
And there's roles_permissions table generated in database:
|role_entity_id|permission_entity_id|
|--------------|--------------------|
| 1 | 1 |
How can I solve this issue?

Answer 1

After torturing for several hours, I found that I was missing some properties to be specified in #ManyToMany relation.
So, I changed my RoleEntity to:
#Entity({ tableName: 'roles' })
export class RoleEntity {
#PrimaryKey() id: number;
#Property() name: string;
...
#ManyToMany({
entity: () => PermissionEntity,
owner: true,
pivotTable: 'roles_permissions',
joinColumn: 'role_entity_id',
inverseJoinColumn: 'permission_entity_id',
hidden: true,
})
permissions = new Collection<PermissionEntity>(this);
}
And now I can select role with it's permissions from database.