modified the models.DishRating struct as well with the appropriate ch…

…ange

server/backend/cafeteria.go

@@ -409,12 +409,11 @@ func (s *CampusServer) CreateDishRating(ctx context.Context, input *pb.CreateDis
 	resPath := imageWrapper(input.Image, "dishes", dishInMensa.Dish)
 
 	rating := model.DishRating{
-		Comment:     input.Comment,
-		CafeteriaID: cafeteriaID,
-		DishID:      dishInMensa.Dish,
-		Points:      input.Points,
-		Timestamp:   time.Now(),
-		Image:       resPath,
+		Comment:   input.Comment,
+		DishID:    dishInMensa.Dish,
+		Points:    input.Points,
+		Timestamp: time.Now(),
+		Image:     resPath,
 	}
 	if err := tx.Create(&rating).Error; err != nil {
 		log.WithError(err).Error("while creating a new dishInMensa rating.")

server/backend/migration/20240311000000.go

@@ -7,32 +7,33 @@ import (
 
 // migrate20240311000000
 // made sure that dishes have the correct indexes
-// changed how `dish_ratings` is bound to `dish`
+// changed how `dish_rating` is bound to `dish`
 func migrate20240311000000() *gormigrate.Migration {
 	return &gormigrate.Migration{
 		ID: "20240311000000",
 		Migrate: func(tx *gorm.DB) error {
-			// make sure that dish_ratings are FK-bound to dishes
+			// make sure that dish_rating is FK-bound to dish
 			if err := tx.Exec(`alter table dish_rating
-				add constraint dish_rating_dish_dish_fk
-				foreign key (dishID) references dish (dish)
-				on delete cascade;`).Error; err != nil {
+					add constraint dish_rating_dish_dish_fk
+					foreign key (dishID) references dish (dish)
+					on update cascade 
+				    on delete cascade;`).Error; err != nil {
 				return err
 			}
 			// because dishes already have a cafeteria, storing this again is not necessary
-			if err := tx.Exec(`alter table dish_rating drop column cafeteriaID`).Error; err != nil {
+			if err := tx.Exec("alter table dish_rating drop column cafeteriaID").Error; err != nil {
 				return err
 			}
 			// uniqueness
 			return tx.Exec("create unique index dish_name_cafeteriaID_uindex on dish (name, cafeteriaID)").Error
 		},
 		Rollback: func(tx *gorm.DB) error {
-			// make sure that dish_ratings are FK-bound to dishes
-			if err := tx.Exec(`alter table dish_rating drop constraint dish_rating_dish_dish_fk`).Error; err != nil {
+			// make sure that dish_rating is FK-bound to dishes
+			if err := tx.Exec("alter table dish_rating drop constraint dish_rating_dish_dish_fk").Error; err != nil {
 				return err
 			}
 			// because dishes already have a cafeteria, storing this agiain is not nessesary
-			if err := tx.Exec(`alter table dish_rating add column cafeteriaID int not null`).Error; err != nil {
+			if err := tx.Exec("alter table dish_rating add column cafeteriaID int not null").Error; err != nil {
 				return err
 			}
 			// uniqueness

server/model/dish_rating.go

@@ -5,13 +5,13 @@ import (
 )
 
 type DishRating struct {
-	DishRating  int64     `gorm:"primary_key;AUTO_INCREMENT;column:dishRating;type:int;not null;" json:"dishRating"`
-	Points      int32     `gorm:"column:points;type:int;not null;" json:"points"`
-	CafeteriaID int64     `gorm:"column:cafeteriaID;foreignKey:cafeteria;type:int;not null;" json:"cafeteriaID"`
-	DishID      int64     `gorm:"column:dishID;foreignKey:dish;type:int;not null;" json:"dishID"`
-	Comment     string    `gorm:"column:comment;type:text;" json:"comment"`
-	Timestamp   time.Time `gorm:"column:timestamp;type:timestamp;not null;" json:"timestamp"`
-	Image       string    `gorm:"column:image;type:text;" json:"image"`
+	DishRating int64     `gorm:"primary_key;AUTO_INCREMENT;column:dishRating;type:int;not null;" json:"dishRating"`
+	Points     int32     `gorm:"column:points;type:int;not null;" json:"points"`
+	DishID     int64     `gorm:"column:dishID;type:int;not null;" json:"dishID"`
+	Dish       Dish      `gorm:"foreignKey:dishID;references:dish;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Comment    string    `gorm:"column:comment;type:text;" json:"comment"`
+	Timestamp  time.Time `gorm:"column:timestamp;type:timestamp;not null;" json:"timestamp"`
+	Image      string    `gorm:"column:image;type:text;" json:"image"`
 }
 
 // TableName sets the insert table name for this struct type