Method HasColumn

migrator/migrator.go:429–447

HasColumn check has column `field` for value or not

(value interface{}, field string)

// HasColumn check has column `field` for value or not
func (m Migrator) HasColumn(value interface{}, field string) bool {
	var count int64
	m.RunWithValue(value, func(stmt *gorm.Statement) error {
		currentDatabase := m.DB.Migrator().CurrentDatabase()
		name := field
		if stmt.Schema != nil {
			if field := stmt.Schema.LookUpField(field); field != nil {
				name = field.DBName
			}
		}

		return m.DB.Raw(
			"SELECT count(*) FROM INFORMATION_SCHEMA.columns WHERE table_schema = ? AND table_name = ? AND column_name = ?",
			currentDatabase, stmt.Table, name,
		).Row().Scan(&count)
	})

	return count > 0
}

// RenameColumn rename value's field name from oldName to newName
func (m Migrator) RenameColumn(value interface{}, oldName, newName string) error {