Goravel ORM 新增模型关联，用 Golang 写关联也可以跟 Laravel 一样简单

type User struct {
  orm.Model
  Name   string
  Posts  []*Post
}
type Post struct {
  orm.Model
  UserID   uint
  Name     string
}Copy

var user models.User
facades.Orm.Query().With("Post").Find(&user)

// 预加载多个关联模型（嵌套预加载）
facades.Orm.Query().With("Post").With("Phone.Contact").Find(&user)

// 为预加载添加约束
facades.Orm.Query().With("Post", "name = ?", "author").Find(&user)
facades.Orm.Query().With("Post", func(query orm.Query) orm.Query {
  return query.Where("name = ?", "author")
}).Find(&book)Copy

var user models.User
facades.Orm.Query().Find(&user)
facades.Orm.Query().Load(&user, "Post")

// 为预加载添加约束
facades.Orm.Query().Load(&book, "Post", "name = ?", "author").Find(&book)
facades.Orm.Query().Load(&book, "Post", func(query orm.Query) orm.Query {
  return query.Where("name = ?", "author")
}).Find(&book)Copy

user := User{Name: "user", Post: &Post{Name: "post"}}

// 创建 User 的同时创建所有子关联
facades.Orm.Query().Select(orm.Associations).Create(&user)Copy