gorm创建数据库记录，没有就创建，有就更新

数据库的字段

type PerformanceConfig struct {
    gorm.Model
    InterfaceName              string         `gorm:"column:interfacename;primary_key;unique"`
    TestId                  string         `gorm:"column:testid"`
    MaxUsers                  string         `gorm:"column:maxusers"`
    AvgThroughput                 string         `gorm:"column:avgthroughput"`  
    Errors                    string         `gorm:"column:errors"`
    AvgResponseTime              string        `gorm:"column:avgResponsetime"`
    ResponseTime90              string         `gorm:"column:responsetime90"`
    AvgBandwidth              string         `gorm:"column:avgbandwidth"`
    AvgTransactions             string         `gorm:"column:avgtransactions"`
    
}

判断是否主键已有记录，有则更新，没有就创建

func (*PerformanceConfig) Create(config PerformanceConfig) {    
    plan := PerformanceConfig{}
    InterfaceName := config.InterfaceName   
    err := db.Where("interfacename=?",InterfaceName).First(&plan).Error
    if err != nil {
        // error handling...
        fmt.Println(err)
        if gorm.IsRecordNotFoundError(err){
            db.Create(&config)  // newUser not user
        }
    }else{
        db.Model(&config).Where("interfacename = ?", InterfaceName).Updates(&config)
    }   
}