条件比较灵活,可以用于 db.Frist, db.Last, db.Find, db.Where 等方法。
单个整数
指定主键id
3
sql: id = 3
一组整数
指定一组主键id
[]int{1,2,3}
sql: id in (1,2,3)
字符串开头，后跟参数
简单 sql
"age = ?", 11
sql: age = 11
"name = ?", "user1"
sql: name = "user1"
结构
将只查询具有值的那些字段
&User{Name: "user1", Age: 12}
sql: name = "user1" AND age = 12
映射 map[string]interface{}
map[string]interface{}{"name": "user1", "age": 12}
sql: name = "user1" AND age = 12
