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347 lines
8.4 KiB
Go
347 lines
8.4 KiB
Go
package mysqldb
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import (
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"fmt"
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"regexp"
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"time"
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"github.com/xxjwxc/public/mylog"
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"gorm.io/gorm"
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)
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// TabColumnInfo 表信息
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type TabColumnInfo struct {
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ColumnName string
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ColumnType string // 跟数据库一致
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Len string
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NotNull bool
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Comment string // 注释
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}
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type TablesModel struct {
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ID int `gorm:"primaryKey;column:id" json:"-"` // 主键id
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}
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type TablesTools struct {
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tabName string
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orm *MySqlDB
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}
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// Tables
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func NewTabTools(orm *MySqlDB, tabName string) (*TablesTools, error) {
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return &TablesTools{
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orm: orm,
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tabName: tabName,
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}, nil
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}
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// GetDB 获取db
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func (t *TablesTools) GetDB() *gorm.DB {
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return t.orm.Table(t.tabName)
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}
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// CreateTable 创建表
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func (t *TablesTools) CreateTable(columns []*TabColumnInfo) error {
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err := t.orm.Table(t.tabName).Set("gorm:table_options", "ENGINE=InnoDB").Migrator().CreateTable(&TablesModel{})
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if err != nil {
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return err
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}
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for _, v := range columns {
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err := t.AddColumn(v)
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if err != nil {
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return err
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}
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// notnul := ""
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// if v.NotNull {
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// notnul = "NOT NULL"
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// }
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// _len := v.Len
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// if len(v.Len) > 0 {
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// _len = fmt.Sprintf("(%v)", v.Len)
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// }
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// sql := fmt.Sprintf("ALTER TABLE `%v` ADD COLUMN `%v` %v%v %v COMMENT '%v';", t.tabName, v.ColumnName, v.ColumnType, _len, notnul, v.Comment)
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// err = t.orm.Exec(sql).Error
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// if err != nil {
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// return err
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// }
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}
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return err
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}
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// HasTable 表是否存在
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func (t *TablesTools) HasTable() bool {
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return t.orm.Migrator().HasTable(t.tabName)
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}
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// DropTable 如果存在表则删除（删除时会忽略、删除外键约束)
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func (t *TablesTools) DropTable() error {
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return t.orm.Migrator().DropTable(t.tabName)
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}
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// TruncateTable 截断表
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func (t *TablesTools) TruncateTable() error {
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return t.orm.Exec(fmt.Sprintf("TRUNCATE TABLE %v;", t.tabName)).Error
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}
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// GetTables 获取所有表名
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func (t *TablesTools) GetTables() (tableList []string, err error) {
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return t.orm.Migrator().GetTables()
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}
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// RenameTable 重命名表
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func (t *TablesTools) RenameTable(newTabName string) error {
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return t.orm.Migrator().RenameTable(t.tabName, newTabName)
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}
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// AddColumn 添加列元素
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func (t *TablesTools) AddColumn(column *TabColumnInfo) error {
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notnul := ""
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if column.NotNull {
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notnul = "NOT NULL"
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}
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_len := column.Len
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if len(column.Len) > 0 {
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_len = fmt.Sprintf("(%v)", column.Len)
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}
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sql := fmt.Sprintf("ALTER TABLE `%v` ADD COLUMN `%v` %v%v %v COMMENT '%v';", t.tabName, column.ColumnName, column.ColumnType, _len, notnul, column.Comment)
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err := t.orm.Exec(sql).Error
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if err != nil {
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return err
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}
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return nil
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}
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// HasColumn 是否有列
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func (t *TablesTools) HasColumn(column string) bool {
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return t.orm.Table(t.tabName).Migrator().HasColumn(&TablesModel{}, column)
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}
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// DropColumn 删除列
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func (t *TablesTools) DropColumn(column string) error {
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return t.orm.Table(t.tabName).Migrator().DropColumn(&TablesModel{}, column)
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}
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// RenameColumn 字段重命名
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func (t *TablesTools) RenameColumn(oldColumn, newColumn string) error {
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return t.orm.Table(t.tabName).Migrator().RenameColumn(&TablesModel{}, oldColumn, newColumn)
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}
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// ColumnTypes 获取列属性
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func (t *TablesTools) ColumnTypes() ([]gorm.ColumnType, error) {
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return t.orm.Table(t.tabName).Migrator().ColumnTypes(&TablesModel{})
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}
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// CreateIndex Indexes
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func (t *TablesTools) CreateIndex(column string) error {
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return t.orm.Table(t.tabName).Migrator().CreateIndex(&TablesModel{}, column)
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}
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// DropIndex Indexes
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func (t *TablesTools) DropIndex(column string) error {
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return t.orm.Table(t.tabName).Migrator().DropIndex(&TablesModel{}, column)
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}
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// HasIndex Indexes
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func (t *TablesTools) HasIndex(column string) bool {
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return t.orm.Table(t.tabName).Migrator().HasIndex(&TablesModel{}, column)
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}
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// RenameIndex Indexes
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func (t *TablesTools) RenameIndex(oldColumn, newColumn string) error {
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return t.orm.Table(t.tabName).Migrator().RenameIndex(&TablesModel{}, oldColumn, newColumn)
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}
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type ColumnTypeInfo struct {
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Name string
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Type string
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Commont string
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}
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// RawInfo 列信息
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type RawInfo struct {
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ColumnTypes []ColumnTypeInfo
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Values [][]interface{}
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}
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// Select 查询
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func (t *TablesTools) Select(DB *gorm.DB) (*RawInfo, error) {
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colTypes, err := t.ColumnTypes()
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if err != nil {
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return nil, err
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}
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out := &RawInfo{}
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for i, v := range colTypes {
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commont, _ := v.Comment()
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out.ColumnTypes = append(out.ColumnTypes, ColumnTypeInfo{
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Name: v.Name(),
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Type: ColumnType(colTypes[i]),
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Commont: commont,
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})
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}
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rows, err := DB.Table(t.tabName).Rows()
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var values []interface{} //创建一个与列的数量相当的空接口
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for _, v := range out.ColumnTypes {
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deserialize(v.Type, &values)
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}
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err := rows.Scan(values...) //开始读行，Scan函数只接受指针变量
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if err != nil {
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return nil, err
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}
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out.Values = append(out.Values, values) //将单行所有列的键值对附加在总的返回值上（以行为单位）
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}
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return out, err
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}
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func deserialize(tp string, data *[]interface{}) interface{} {
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switch tp {
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case "int":
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var tmp int
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*data = append(*data, &tmp)
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case "int64":
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var tmp int64
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*data = append(*data, &tmp)
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case "string":
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var tmp string
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*data = append(*data, &tmp)
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case "[]byte":
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var tmp []byte
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*data = append(*data, &tmp)
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case "time":
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var tmp time.Time
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*data = append(*data, &tmp)
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case "bool":
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var tmp bool
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*data = append(*data, &tmp)
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case "float64":
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var tmp float64
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*data = append(*data, &tmp)
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default:
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mylog.Errorf("type (%v) not match in any way.maybe need to add on", tp)
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}
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return nil
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}
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// "VARCHAR", "TEXT", "NVARCHAR", "DECIMAL", "BOOL",
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// "INT", and "BIGINT".
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func ColumnType(t gorm.ColumnType) string {
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tp, _ := t.ColumnType()
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// Precise matching first.先精确匹配
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if v, ok := TypeMysqlDicMp[tp]; ok {
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return v
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}
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// Fuzzy Regular Matching.模糊正则匹配
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for _, l := range TypeMysqlMatchList {
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if ok, _ := regexp.MatchString(l.Key, tp); ok {
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return l.Value
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}
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}
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return tp
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}
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// TypeMysqlDicMp Accurate matching type.精确匹配类型
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var TypeMysqlDicMp = map[string]string{
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"int": "int",
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"int unsigned": "int",
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"tinyint": "int",
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"tinyint unsigned": "int",
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"mediumint": "int",
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"mediumint unsigned": "int",
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"smallint": "int64",
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"smallint unsigned": "int64",
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"bigint": "int64",
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"bigint unsigned": "int64",
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"timestamp": "int64",
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"integer": "int64",
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"varchar": "string",
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"char": "string",
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"json": "string",
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"text": "string",
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"mediumtext": "string",
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"longtext": "string",
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"tinytext": "string",
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"enum": "string",
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"nvarchar": "string",
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"bit(1)": "[]byte",
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"tinyblob": "[]byte",
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"blob": "[]byte",
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"mediumblob": "[]byte",
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"longblob": "[]byte",
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"binary": "[]byte",
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"date": "time",
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"datetime": "time",
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"time": "time",
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"smalldatetime": "time", //sqlserver
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"tinyint(1)": "bool", // tinyint(1) 默认设置成bool
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"tinyint(1) unsigned": "bool", // tinyint(1) 默认设置成bool
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"double": "float64",
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"double unsigned": "float64",
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"float": "float64",
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"float unsigned": "float64",
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"real": "float64",
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"numeric": "float64",
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}
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// TypeMysqlMatchList Fuzzy Matching Types.模糊匹配类型
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var TypeMysqlMatchList = []struct {
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Key string
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Value string
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}{
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{`^(tinyint)[(]\d+[)] unsigned`, "int"},
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{`^(smallint)[(]\d+[)] unsigned`, "int"},
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{`^(int)[(]\d+[)] unsigned`, "int"},
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{`^(tinyint)[(]\d+[)]`, "int"},
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{`^(smallint)[(]\d+[)]`, "int"},
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{`^(int)[(]\d+[)]`, "int"},
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{`^(mediumint)[(]\d+[)]`, "int"},
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{`^(mediumint)[(]\d+[)] unsigned`, "int"},
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{`^(integer)[(]\d+[)]`, "int"},
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{`^(bigint)[(]\d+[)] unsigned`, "int64"},
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{`^(bigint)[(]\d+[)]`, "int64"},
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{`^(timestamp)[(]\d+[)]`, "int64"},
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{`^(float)[(]\d+,\d+[)] unsigned`, "float64"},
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{`^(double)[(]\d+,\d+[)] unsigned`, "float64"},
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{`^(decimal)[(]\d+,\d+[)]`, "float64"},
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{`^(double)[(]\d+,\d+[)]`, "float64"},
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{`^(float)[(]\d+,\d+[)]`, "float64"},
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{`^(char)[(]\d+[)]`, "string"},
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{`^(enum)[(](.)+[)]`, "string"},
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{`^(varchar)[(]\d+[)]`, "string"},
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{`^(text)[(]\d+[)]`, "string"},
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{`^(set)[(][\s\S]+[)]`, "string"},
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{`^(varbinary)[(]\d+[)]`, "[]byte"},
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{`^(blob)[(]\d+[)]`, "[]byte"},
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{`^(binary)[(]\d+[)]`, "[]byte"},
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{`^(bit)[(]\d+[)]`, "[]byte"},
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{`^(geometry)[(]\d+[)]`, "[]byte"},
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{`^(datetime)[(]\d+[)]`, "time"},
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}
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