Migrator().ColumnTypes() not working inside Transaction

[rny]

issue

I found AutoMigrate no longer works when put inside Transaction after recent updates of postgres driver. Then I found it is caused by Migrator().ColumnTypes() not work when it is put inside Transaction. example code below (sorry about the playground thing)

env

PostgreSQL 12.9 (Ubuntu 12.9-0ubuntu0.20.04.1)
gorm.io/driver/postgres v1.3.1
gorm.io/gorm v1.23.2

code

	type Email struct {
		gorm.Model
		Email string
	}

	result, ok := db.Migrator().ColumnTypes(&Email{})
	log.Printf("db:")
	log.Printf("ColumnTypes: %v", result)
	log.Printf("ColumnTypes error: %v", ok)

	// transaction
	if err := db.Transaction(func(tx *gorm.DB) error {
		result, ok := tx.Migrator().ColumnTypes(&Email{})
		log.Printf("Transaction:")
		log.Printf("ColumnTypes: %v", result)
		log.Printf("ColumnTypes error: %v", ok)
		return nil
	}); err != nil {
		return err
	}

output

2022/03/09 01:55:22 db:
2022/03/09 01:55:22 ColumnTypes: [{0xc0001fa230 {id true} {int8 true} { false} {true true} {false true} {true true} {64 true} {64 true} {0 true} {false true} <nil> { false} { false}} {0xc0001fa280 {created_at true} {timestamptz true} { false} {false true} {false true} {false false} {64 true} {6 true} {0 false} {true true} <nil> { false} { false}} {0xc0001fa2d0 {updated_at true} {timestamptz true} { false} {false true} {false true} {false false} {64 true} {6 true} {0 false} {true true} <nil> { false} { false}} {0xc0001fa320 {deleted_at true} {timestamptz true} { false} {false true} {false true} {false false} {64 true} {6 true} {0 false} {true true} <nil> { false} { false}} {0xc0001fa370 {email true} {text true} { false} {false true} {false true} {false false} {0 false} {0 false} {0 false} {true true} <nil> { false} { false}}]
2022/03/09 01:55:22 ColumnTypes error: <nil>

2022/03/09 01:55:22 /go/pkg/mod/gorm.io/driver/postgres@v1.3.1/migrator.go:331 driver: bad connection
[0.000ms] [rows:-] SELECT * FROM "emails" LIMIT 1
2022/03/09 01:55:22 Transaction:
2022/03/09 01:55:22 ColumnTypes: []
2022/03/09 01:55:22 ColumnTypes error: driver: bad connection

[jinzhu]

Should been fixed in latest version.