文章目录
- 1 gorm
- 2 xorm
- 3 ent
前言：本文介绍golang三种orm框架联表查询
1 gorm
type UserTest struct {Count int `json:"count,omitempty"`Type string `json:"type,omitempty"`
}
res := []UserTest{}
db.Joins("LEFT JOIN user ON order.user_id = user.id").Find(&res)
2 xorm
err := db.Table("user").Select("name as org, count(status) as count").Join("LEFT", "order", "user.id= order.user_id").In("name", orgNames).GroupBy("name").OrderBy("count(status) desc").Find(&res)
3 ent
err := db.User.Query().Where(user.CompanyIDIn(companyIds...)).GroupBy(user.FieldCompanyID).Aggregate(func(s *sql.Selector) string {t := sql.Table(order.Table)s.Join(t).On(s.C(user.FieldID), t.C(order.FieldUserID))return sql.As(sql.Count(t.C(order.FieldBandwidth)), "count")},).Scan(c, &res)
输出：
[{"type": "xxx","count": 24},{"type": "yyy","count": 65,}
]
)
