fix: Automatically migrate recent table structure changes. (#1696)

* auto migrate alerting_engines[engine_cluster],task_record[event_id],chart_share[datasource_id],recording_rule[datasource_ids]

* auto migrate code refactor

* auto migrate drop chart_share

* auto migrate drop dashboard_id

---------
Co-authored-by: NshardingHe <wangzihe@flashcat.cloud>

models/migrate/migrate.go

@@ -7,39 +7,52 @@ import (
 )
 
 func Migrate(db *gorm.DB) {
-	MigrateRecordingTable(db)
+	MigrateTables(db)
 	MigrateEsIndexPatternTable(db)
 }
 
-type RecordingRule struct {
-	QueryConfigs string `gorm:"type:text;not null;column:query_configs"` // query_configs
-}
-
-func MigrateRecordingTable(db *gorm.DB) error {
-	err := db.AutoMigrate(&RecordingRule{})
-	if err != nil {
-		logger.Errorf("failed to migrate recording rule table: %v", err)
-		return err
+func MigrateTables(db *gorm.DB) error {
+	dts := []interface{}{&RecordingRule{}, &AlertRule{}, &AlertSubscribe{}, &AlertMute{}, &TaskRecord{}, &ChartShare{}}
+	if !columnHasIndex(db, &AlertHisEvent{}, "last_eval_time") {
+		dts = append(dts, &AlertHisEvent{})
 	}
-
-	err = db.AutoMigrate(&AlertRule{})
+	err := db.AutoMigrate(dts...)
 	if err != nil {
-		logger.Errorf("failed to migrate recording rule table: %v", err)
+		logger.Errorf("failed to migrate table: %v", err)
 		return err
 	}
 
-	err = db.AutoMigrate(&AlertSubscribe{})
-	if err != nil {
-		logger.Errorf("failed to migrate recording rule table: %v", err)
-		return err
+	if db.Migrator().HasColumn(&AlertingEngines{}, "cluster") {
+		err = db.Migrator().RenameColumn(&AlertingEngines{}, "cluster", "engine_cluster")
+		if err != nil {
+			logger.Errorf("failed to renameColumn table: %v", err)
+			return err
+		}
+	}
+	if db.Migrator().HasColumn(&ChartShare{}, "dashboard_id") {
+		err = db.Migrator().DropColumn(&ChartShare{}, "dashboard_id")
+		if err != nil {
+			logger.Errorf("failed to DropColumn table: %v", err)
+		}
 	}
 
-	err = db.AutoMigrate(&AlertMute{})
+	return nil
+}
+
+func columnHasIndex(db *gorm.DB, dst interface{}, indexColumn string) bool {
+	indexes, err := db.Migrator().GetIndexes(dst)
 	if err != nil {
-		logger.Errorf("failed to migrate recording rule table: %v", err)
-		return err
+		logger.Errorf("failed to table getIndexes: %v", err)
+		return false
 	}
-	return nil
+	for i := range indexes {
+		for j := range indexes[i].Columns() {
+			if indexes[i].Columns()[j] == indexColumn {
+				return true
+			}
+		}
+	}
+	return false
 }
 
 type AlertRule struct {
@@ -55,3 +68,22 @@ type AlertSubscribe struct {
 type AlertMute struct {
 	Severities string `gorm:"column:severities;type:varchar(32);not null;default:''"`
 }
+
+type RecordingRule struct {
+	QueryConfigs  string `gorm:"type:text;not null;column:query_configs"` // query_configs
+	DatasourceIds string `gorm:"column:datasource_ids;type:varchar(255);default:'';comment:datasource ids"`
+}
+
+type AlertingEngines struct {
+	EngineCluster string `gorm:"column:engine_cluster;type:varchar(128);default:'';comment:n9e engine cluster"`
+}
+
+type ChartShare struct {
+	DatasourceId int64 `gorm:"column:datasource_id;bigint(20);not null;default:0;comment:datasource id"`
+}
+type TaskRecord struct {
+	EventId int64 `gorm:"column:event_id;bigint(20);not null;default:0;comment:event id;index:idx_event_id"`
+}
+type AlertHisEvent struct {
+	LastEvalTime int64 `gorm:"column:last_eval_time;bigint(20);not null;default:0;comment:for time filter;index:idx_last_eval_time"`
+}