107 lines
2.8 KiB
Go
107 lines
2.8 KiB
Go
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package model
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import (
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"blog/global"
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"blog/pkg/setting"
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"fmt"
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"github.com/jinzhu/gorm"
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"time"
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)
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type Model struct {
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ID uint32 `gorm:"primary_key" json:"id"`
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CreatedBy string `json:"created_by"`
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ModifiedBy string `json:"modified_by"`
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CreatedOn uint32 `json:"created_on"`
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ModifiedOn uint32 `json:"modified_on"`
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DeletedOn uint32 `json:"deleted_on"`
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IsDel uint8 `json:"is_del"`
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}
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func NewDBEngine(databaseSetting *setting.DatabaseSettingS) (*gorm.DB, error) {
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db, err := gorm.Open(databaseSetting.DBType, fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=%s&parseTime=%t&loc=Local",
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databaseSetting.UserName,
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databaseSetting.Password,
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databaseSetting.Host,
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databaseSetting.DBName,
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databaseSetting.Charset,
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databaseSetting.ParseTime,
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))
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if err != nil {
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return nil, err
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}
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if global.ServerSetting.RunMode == "debug" {
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db.LogMode(true)
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}
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db.SingularTable(true)
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db.DB().SetMaxIdleConns(databaseSetting.MaxIdleConns)
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db.DB().SetMaxOpenConns(databaseSetting.MaxOpenConns)
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db.Callback().Create().Replace("gorm:update_time_stamp", updateTimeStampForCreateCallback)
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db.Callback().Update().Replace("gorm:update_time_stamp", updateTimeStampForUpdateCallback)
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db.Callback().Delete().Replace("gorm:delete", deleteCallback)
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return db, nil
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}
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func updateTimeStampForCreateCallback(scope *gorm.Scope) {
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if !scope.HasError() {
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nowTime := time.Now().Unix()
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if createTimeField, ok := scope.FieldByName("CreatedOn"); ok {
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if createTimeField.IsBlank {
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_ = createTimeField.Set(nowTime)
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}
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}
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if modifyTimeField, ok := scope.FieldByName("ModifiedOn"); ok {
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if modifyTimeField.IsBlank {
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_ = modifyTimeField.Set(nowTime)
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}
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}
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}
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}
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func updateTimeStampForUpdateCallback(scope *gorm.Scope) {
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if _, ok := scope.Get("gorm:update_column"); !ok {
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_ = scope.SetColumn("ModifiedOn", time.Now().Unix())
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}
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}
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func deleteCallback(scope *gorm.Scope) {
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if !scope.HasError() {
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var extraOption string
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if str, ok := scope.Get("gorm:delete_option"); ok {
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extraOption = fmt.Sprint(str)
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}
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deletedOnField, hasDeletedOnField := scope.FieldByName("DeletedOn")
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isDelField, hasIsDelField := scope.FieldByName("IsDel")
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if !scope.Search.Unscoped && hasDeletedOnField && hasIsDelField {
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now := time.Now().Unix()
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scope.Raw(fmt.Sprintf(
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"UPDATE %v SET %v=%v,%v=%v%v%v",
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scope.QuotedTableName(),
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scope.Quote(deletedOnField.DBName),
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scope.AddToVars(now),
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scope.Quote(isDelField.DBName),
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scope.AddToVars(1),
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addExtraSpaceIfExist(scope.CombinedConditionSql()),
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addExtraSpaceIfExist(extraOption),
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)).Exec()
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} else {
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scope.Raw(fmt.Sprintf(
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"DELETE FROM %v%v%v",
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scope.QuotedTableName(),
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addExtraSpaceIfExist(scope.CombinedConditionSql()),
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addExtraSpaceIfExist(extraOption),
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)).Exec()
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}
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}
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}
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func addExtraSpaceIfExist(str string) string {
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if str != "" {
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return " " + str
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}
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return ""
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}
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