JunctionColumn class

Custom column for junction tables

Use this to add extra attributes to ManyToMany junction tables.

Example:

@ManyToMany(
  targetEntity: RoleEntity,
  joinTable: JoinTable(
    name: 'user_roles',
    joinColumn: JoinColumn(name: 'user_id'),
    inverseJoinColumn: JoinColumn(name: 'role_id'),
    extraColumns: [
      JunctionColumn(name: 'assigned_at', type: JunctionColumnType.timestamp, defaultValue: 'CURRENT_TIMESTAMP'),
      JunctionColumn(name: 'assigned_by', type: JunctionColumnType.integer, nullable: true),
      JunctionColumn(name: 'is_active', type: JunctionColumnType.boolean, defaultValue: 'true'),
    ],
  ),
)
List<RoleEntity>? roles;