diff --git a/model/channel.go b/model/channel.go
index 6bfeb4e4..605c6d17 100644
--- a/model/channel.go
+++ b/model/channel.go
@@ -13,7 +13,7 @@ import (
 type Channel struct {
 	Id                 int     `json:"id"`
 	Type               int     `json:"type" gorm:"default:0"`
-	Key                string  `json:"key" gorm:"not null;index"`
+	Key                string  `json:"key" gorm:"type:text"`
 	Status             int     `json:"status" gorm:"default:1"`
 	Name               string  `json:"name" gorm:"index"`
 	Weight             *uint   `json:"weight" gorm:"default:0"`
@@ -47,11 +47,7 @@ func GetAllChannels(startIdx int, num int, scope string) ([]*Channel, error) {
 }
 
 func SearchChannels(keyword string) (channels []*Channel, err error) {
-	keyCol := "`key`"
-	if common.UsingPostgreSQL {
-		keyCol = `"key"`
-	}
-	err = DB.Omit("key").Where("id = ? or name LIKE ? or "+keyCol+" = ?", helper.String2Int(keyword), keyword+"%", keyword).Find(&channels).Error
+	err = DB.Omit("key").Where("id = ? or name LIKE ?", helper.String2Int(keyword), keyword+"%").Find(&channels).Error
 	return channels, err
 }