chore: add version checker

store/db/db.go

@@ -153,12 +153,20 @@ func (db *DB) compareMigrationHistory() error {
 	}
 
 	currentVersion := common.Version
-	migrationHistory, err := upsertMigrationHistory(db.Db, currentVersion)
+	migrationHistoryFind := MigrationHistoryFind{
+		Version: currentVersion,
+	}
+	migrationHistory, err := findMigrationHistory(db.Db, &migrationHistoryFind)
 	if err != nil {
 		return err
 	}
 	if migrationHistory == nil {
-		return fmt.Errorf("failed to upsert migration history")
+		// ...do schema migration,
+		// then upsert the newest version to migration_history
+		_, err := upsertMigrationHistory(db.Db, currentVersion)
+		if err != nil {
+			return err
+		}
 	}
 
 	return nil

store/db/migration_history.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"database/sql"
+	"strings"
 )
 
 type MigrationHistory struct {
@@ -9,6 +10,59 @@ type MigrationHistory struct {
 	Version   string
 }
 
+type MigrationHistoryFind struct {
+	Version string
+}
+
+func findMigrationHistoryList(db *sql.DB, find *MigrationHistoryFind) ([]*MigrationHistory, error) {
+	where, args := []string{"1 = 1"}, []interface{}{}
+
+	where, args = append(where, "version = ?"), append(args, find.Version)
+
+	rows, err := db.Query(`
+		SELECT 
+			version,
+			created_ts
+		FROM
+			migration_history
+		WHERE `+strings.Join(where, " AND ")+`
+		ORDER BY created_ts DESC`,
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	migrationHistoryList := make([]*MigrationHistory, 0)
+	for rows.Next() {
+		var migrationHistory MigrationHistory
+		if err := rows.Scan(
+			&migrationHistory.Version,
+			&migrationHistory.CreatedTs,
+		); err != nil {
+			return nil, err
+		}
+
+		migrationHistoryList = append(migrationHistoryList, &migrationHistory)
+	}
+
+	return migrationHistoryList, nil
+}
+
+func findMigrationHistory(db *sql.DB, find *MigrationHistoryFind) (*MigrationHistory, error) {
+	list, err := findMigrationHistoryList(db, find)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(list) == 0 {
+		return nil, nil
+	} else {
+		return list[0], nil
+	}
+}
+
 func upsertMigrationHistory(db *sql.DB, version string) (*MigrationHistory, error) {
 	row, err := db.Query(`
 		INSERT INTO migration_history (