res := DB.FirstOrCreate(&user, "name = ?", user.Name)
	if res.Error != nil || res.RowsAffected != 1 {
		t.Fatalf("first or create rows affect err:%v rows:%d", res.Error, res.RowsAffected)
	}

	res = DB.FirstOrCreate(&user, "name = ?", user.Name)
	if res.Error != nil || res.RowsAffected != 0 {
		t.Fatalf("first or create rows affect err:%v rows:%d", res.Error, res.RowsAffected)
	}
}

	}
	return
}

// Or add OR conditions
//
// Or is used to chain together queries with an OR.
//
//	// Find the first user with name equal to jinzhu or john
//	db.Where("name = ?", "jinzhu").Or("name = ?", "john").First(&user)
func (db *DB) Or(query interface{}, args ...interface{}) (tx *DB) {
	tx = db.getInstance()

			return tx.Exec("DROP TABLE IF EXISTS ?", m.CurrentTable(stmt)).Error
		}); err != nil {
			return err
		}
	}
	return nil
}

// HasTable returns table exists or not for value, value could be a struct or string
func (m Migrator) HasTable(value interface{}) bool {
	var count int64

	m.RunWithValue(value, func(stmt *gorm.Statement) error {
		currentDatabase := m.DB.Migrator().CurrentDatabase()

				}
			}

			specifiedRelationsName := make(map[string]interface{})
			for _, join := range db.Statement.Joins {
				if db.Statement.Schema != nil {
					var isRelations bool // is relations or raw sql
					var relations []*schema.Relationship
					relation, ok := db.Statement.Schema.Relationships.Relations[join.Name]
					if ok {
						isRelations = true
						relations = append(relations, relation)

				// Make sure to rollback when panic, Block error or Commit error
				if panicked || err != nil {
					db.RollbackTo(fmt.Sprintf("sp%p", fc))
				}
			}()
		}
		err = fc(db.Session(&Session{NewDB: db.clone == 1}))
	} else {
		tx := db.Begin(opts...)
		if tx.Error != nil {
			return tx.Error
		}

		defer func() {
			// Make sure to rollback when panic, Block error or Commit error
			if panicked || err != nil {

		names = append(names, embeddedValues(relations)...)
	}
	return names
}

// preloadEntryPoint enters layer by layer. It will call real preload if it finds the right entry point.
// If the current relationship is embedded or joined, current query will be ignored.
//
//nolint:cyclop
func preloadEntryPoint(db *gorm.DB, joins []string, relationships *schema.Relationships, preloads map[string][]interface{}, associationsConds []interface{}) error {

			}
		} else {
			stmt.AddError(ErrInvalidField)
		}
	} else {
		stmt.AddError(ErrInvalidField)
	}
}

// Changed check model changed or not when updating
func (stmt *Statement) Changed(fields ...string) bool {
	modelValue := stmt.ReflectValue
	switch modelValue.Kind() {
	case reflect.Slice, reflect.Array:

	if !regexp.MustCompile(`WHERE \(\(a = .+ or b = .+\) OR \(c = .+ and d = .+\) OR \(e = .+ and f = .+\)\) AND .users.\..deleted_at. IS NULL`).MatchString(sql) {
		t.Fatalf("invalid sql generated, got %v", sql)
	}

		if field.DBName == "" && field.DataType != "" {
			field.DBName = namer.ColumnName(schema.Table, field.Name)
		}

		bindName := field.BindName()
		if field.DBName != "" {
			// nonexistence or shortest path or first appear prioritized if has permission
			if v, ok := schema.FieldsByDBName[field.DBName]; !ok || ((field.Creatable || field.Updatable || field.Readable) && len(field.BindNames) < len(v.BindNames)) {

		field.Precision, _ = strconv.Atoi(p)
	}

	if s, ok := field.TagSettings["SCALE"]; ok {
		field.Scale, _ = strconv.Atoi(s)
	}

	// default value is function or null or blank (primary keys)
	field.DefaultValue = strings.TrimSpace(field.DefaultValue)
	skipParseDefaultValue := strings.Contains(field.DefaultValue, "(") &&