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使用SkinnyORM無法檢索模型中嵌套對象內的嵌套對象列表

[英]Cannot retrieve nested object list within nested object in model with SkinnyORM

我有一個具有hasMany關系的模型聯系人,它與模型角色有關。 模型角色與帶有中間表RolePhone的Phone具有hasManyThrough關系。 所有檢索動作均設置為急切。

檢索聯系人時,我會看到其“角色”列表,但每個“角色”都有一個空的“電話”列表。 但是,當我檢索所有角色時,其電話列表中包含正確的電話。

該關系在Contact和Role中都由Default標記,並且我嘗試手動設置Role的joinDefinitions enabledEvenIfAssociated = true但這些都enabledEvenIfAssociated = true

這些是我的模型,僅顯示結構和關系

case class Contact(id: Long, name: String, roles: Seq[Role] = Nil)

object Contact extends SkinnyCRUDMapper[Contact] {
  hasMany[Role](
    Role -> Role.defaultAlias,
    (contact, role) => sqls.eq(contact.id, role.contactId),
    (contact, roles) => contact.copy(roles = roles),
  ).byDefault
}

case class RoleCommand(name: String, phoneNumbers: Seq[Int])

case class Role(id: Long, name: String, contactId: Long, phones: Seq[Phone] = Nil)

object Role extends SkinnyCRUDMapper[Role] {
  hasManyThrough[RolePhone, Phone](
    through = RolePhone -> RolePhone.defaultAlias,
    throughOn = (r, rp) => sqls.eq(r.id, rp.roleId),
    many = Phone -> Phone.defaultAlias,
    on = (rp, p) => sqls.eq(rp.phoneId, p.id),
    merge = (role, phones) => role.copy(phones = phones)
  ).byDefault
}

case class RolePhone(roleId: Long, phoneId: Long)
case class Phone(id: Long, number: Int)

這是我的數據庫結構

create table contact (
  id bigint(20) not null auto_increment primary key,
  name varchar(50) not null unique
) engine=innoDB;

create table role (
  id bigint(20) not null auto_increment primary key,
  name varchar(50) not null unique,
  contact_id bigint(20) not null
) engine=innoDB;

create table phone (
  id bigint(20) not null auto_increment primary key,
  number int(20) not null
) engine=innoDB;

create table role_phone (
  role_id bigint(20) not null,
  phone_id bigint(20) not null
) engine=innoDB;

這是添加的Main類以暴露問題

object Main extends App with Connection with DatasourceConfig  {

  val contact1 = Contact.save("contact1",
    Seq(
      RoleCommand("role1", Seq(12345, 12321)),
      RoleCommand("role2", Seq(54321, 12321)),
      RoleCommand("role3", Seq(12345, 54321)),
    )
  )

  // retrieving a contact won't fill the phones number inside each role
  println(s"My Contact: ${Contact.findById(contact1)}")

  // retrieving a role will fill the phones list
  println(s"All Roles: ${Role.findAll()}")

}

完整代碼在https://github.com/airabinovich/testing_skinny

我希望檢索一個聯系人會得到每個角色內的電話列表。按照上面的示例,應該像這樣

Contact(
  1,
  contact1,
  Vector(
    Role(1,role1,1,Vector(Phone(1,12345), Phone(2,12321))),
    Role(2,role2,1,Vector(Phone(3,54321), Phone(2,12321))),
    Role(3,role3,1,Vector(Phone(1,12345), Phone(3,54321)))
  )
)

但是我明白了

Contact(
  1,
  contact1,
  Vector(
    Role(1,role1,1,List()),
    Role(1,role1,1,List()),
    Role(2,role2,1,List()),
    Role(2,role2,1,List()),
    Role(3,role3,1,List()),
    Role(3,role3,1,List())
  )
)

正如Kazuhiro Sera在他的拉取請求中回答的那樣,可以通過稍微改變關系來完成急切的加載。

object Contact extends SkinnyCRUDMapper[Contact] {
  val rolesRef = hasMany[Role](
    Role -> Role.defaultAlias,
    (contact, role) => sqls.eq(contact.id, role.contactId),
    (contact, roles) => contact.copy(roles = roles),
  ).includes[Role](
    merge = (contacts, roles) => contacts.map(c => c.copy(roles = roles.filter(_.contactId == c.id)))
   ).byDefault
}

並且從數據庫檢索時包括該關系

 println(s"My Contact: ${Contact.includes(Contact.rolesRef).findById(contact1)}")

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