test: test for skip prepared when auto migrate

tests/migrate_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 	"time"
 
+	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
 	"gorm.io/gorm/schema"
 	. "gorm.io/gorm/utils/tests"
@@ -712,3 +713,38 @@ func TestPrimarykeyID(t *testing.T) {
 		t.Fatalf("AutoMigrate err:%v", err)
 	}
 }
+
+func TestInvalidCachedPlan(t *testing.T) {
+	if DB.Dialector.Name() != "postgres" {
+		return
+	}
+
+	db, err := gorm.Open(postgres.Open(postgresDSN), &gorm.Config{})
+	if err != nil {
+		t.Errorf("Open err:%v", err)
+	}
+
+	type Object1 struct{}
+	type Object2 struct {
+		Field1 string
+	}
+	type Object3 struct {
+		Field2 string
+	}
+	db.Migrator().DropTable("objects")
+
+	err = db.Table("objects").AutoMigrate(&Object1{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+
+	err = db.Table("objects").AutoMigrate(&Object2{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+
+	err = db.Table("objects").AutoMigrate(&Object3{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+}

tests/tests_test.go

@@ -17,6 +17,11 @@ import (
 )
 
 var DB *gorm.DB
+var (
+	mysqlDSN     = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
+	postgresDSN  = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
+	sqlserverDSN = "sqlserver://gorm:LoremIpsum86@localhost:9930?database=gorm"
+)
 
 func init() {
 	var err error
@@ -49,13 +54,13 @@ func OpenTestConnection() (db *gorm.DB, err error) {
 	case "mysql":
 		log.Println("testing mysql...")
 		if dbDSN == "" {
-			dbDSN = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
+			dbDSN = mysqlDSN
 		}
 		db, err = gorm.Open(mysql.Open(dbDSN), &gorm.Config{})
 	case "postgres":
 		log.Println("testing postgres...")
 		if dbDSN == "" {
-			dbDSN = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
+			dbDSN = postgresDSN
 		}
 		db, err = gorm.Open(postgres.New(postgres.Config{
 			DSN:                  dbDSN,
@@ -72,7 +77,7 @@ func OpenTestConnection() (db *gorm.DB, err error) {
 		// GO
 		log.Println("testing sqlserver...")
 		if dbDSN == "" {
-			dbDSN = "sqlserver://gorm:LoremIpsum86@localhost:9930?database=gorm"
+			dbDSN = sqlserverDSN
 		}
 		db, err = gorm.Open(sqlserver.Open(dbDSN), &gorm.Config{})
 	default: