cartItem one2one relation to shopitem

models/cart.go

@@ -6,7 +6,7 @@ import (
 
 type CartItem struct {
 	gorm.Model
-	SessionId string `gorm:"index"`
-	ShopItemId int `gorm:"index"`
-	Quantity int
+	SessionId string `json:"sessionid" binding:"required" gorm:"not null"`
+	ShopItem ShopItem `json:"shopitem" gorm:"foreignKey:ID"` //gorm one2one
+	Quantity int `json:"quantity" binding:"required"`
 }