77 lines
1.3 KiB
Markdown
77 lines
1.3 KiB
Markdown
# tdengine-mapper-go
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> Golang 的 struct 与 TDengine 表进行映射
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### struct 标签
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```
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db : 表的列名, 值为 "" 或 "-" 表示忽略
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taos : taos的标签，目前只有 [tag], 表示当前是 超级表的 TAG 字段
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```
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### struct 接口
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```go
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type SuperTableNamer interface {
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SuperTableName() string // 获取超级表的表名 可选
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}
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type TableNamer interface {
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TableName() string // 当前表的表名
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}
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```
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`TableNamer` 是必须要实现的接口
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`SuperTableName` 是可选实现的，如果没有 实现，就会当普通表进行处理
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### 示例
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```go
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type User struct {
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Name string `db:"name" taos:"tag"`
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Age int `db:"age"`
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}
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func (u *User) TableName() string {
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return "user_" + u.Name
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}
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func (u *User) SuperTableName() string {
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return "super_user"
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}
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func TestSimpleInsert(t *testing.T) {
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tdMapping := NewTdMapping()
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data := []any{
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&User{Name: "张三", Age: 18},
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&User{Name: "李四", Age: 20},
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}
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insertSql, err := tdMapping.ToInsertSQL(data...)
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if err != nil {
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t.Fatal(err)
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}
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fmt.Println(insertSql)
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}
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------------------------------------------------------
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INSERT INTO
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`user_张三` USING `super_user` (`name`) TAGS ('张三') (`age`) VALUES (18)
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`user_李四` USING `super_user` (`name`) TAGS ('李四') (`age`) VALUES (20)
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```
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