Update dan Delete database

Author: zumardirahman

book/repository.go

@@ -6,6 +6,8 @@ type Repository interface {
 	FindAll() ([]Book, error)
 	FindByID(ID int) (Book, error)
 	Create(book Book) (Book, error)
+	Update(book Book) (Book, error)
+	Delete(book Book) (Book, error)
 }
 
 type repository struct {
@@ -35,3 +37,15 @@ func (r *repository) Create(book Book) (Book, error) {
 	err := r.db.Create(&book).Error
 	return book, err
 }
+
+func (r *repository) Update(book Book) (Book, error) {
+
+	err := r.db.Save(&book).Error
+	return book, err
+}
+
+func (r *repository) Delete(book Book) (Book, error) {
+
+	err := r.db.Delete(&book).Error
+	return book, err
+}

book/service.go

@@ -4,6 +4,8 @@ type Service interface {
 	FindAll() ([]Book, error)
 	FindByID(ID int) (Book, error)
 	Create(bookRequest BookRequest) (Book, error)
+	Update(ID int, bookRequest BookRequest) (Book, error)
+	Delete(ID int) (Book, error)
 }
 
 type service struct {
@@ -40,3 +42,29 @@ func (s *service) Create(bookRequest BookRequest) (Book, error) {
 	newBook, err := s.repository.Create(book)
 	return newBook, err
 }
+
+func (s *service) Update(ID int, bookRequest BookRequest) (Book, error) {
+
+	book, _ := s.repository.FindByID(ID)
+
+	price, _ := bookRequest.Price.Int64()
+	rating, _ := bookRequest.Rating.Int64()
+	discount, _ := bookRequest.Discount.Int64()
+
+	book.Title = bookRequest.Title
+	book.Price = int(price)
+	book.Description = bookRequest.Description
+	book.Rating = int(rating)
+	book.Discount = int(discount)
+
+	newBook, err := s.repository.Update(book)
+	return newBook, err
+}
+
+func (s *service) Delete(ID int) (Book, error) {
+
+	book, _ := s.repository.FindByID(ID)
+
+	newBook, err := s.repository.Delete(book)
+	return newBook, err
+}

handler/book.go

@@ -59,7 +59,7 @@ func (h *bookHandler) GetBook(c *gin.Context) {
 	})
 }
 
-func (h *bookHandler) PostBooksHandler(c *gin.Context) {
+func (h *bookHandler) CreateBook(c *gin.Context) {
 	var bookRequest book.BookRequest
 
 	err := c.ShouldBindJSON(&bookRequest)
@@ -79,7 +79,46 @@ func (h *bookHandler) PostBooksHandler(c *gin.Context) {
 
 	}
 
-	book, err := h.bookService.Create(bookRequest)
+	b, err := h.bookService.Create(bookRequest)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"errors": err,
+		})
+		return
+	}
+
+	bookResponse := convertToBookResponse(b)
+
+	c.JSON(http.StatusOK, gin.H{
+		"data": bookResponse,
+	})
+
+}
+
+func (h *bookHandler) UpdateBook(c *gin.Context) {
+	var bookRequest book.BookRequest
+
+	err := c.ShouldBindJSON(&bookRequest)
+	if err != nil {
+		//log.Fatal(err) //serber mati
+
+		errorMessages := []string{}
+		for _, e := range err.(validator.ValidationErrors) { //menampilkan erorr validation
+			errorMessage := fmt.Sprintf("Error on field %s, condition: %s", e.Field(), e.ActualTag())
+			errorMessages = append(errorMessages, errorMessage)
+
+			c.JSON(http.StatusBadRequest, gin.H{
+				"errors": errorMessages,
+			})
+			return
+		}
+
+	}
+
+	idString := c.Param("id")
+	id, _ := strconv.Atoi(idString)
+
+	b, err := h.bookService.Update(id, bookRequest)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{
 			"errors": err,
@@ -88,7 +127,26 @@ func (h *bookHandler) PostBooksHandler(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"data": book,
+		"data": convertToBookResponse(b),
+	})
+}
+
+func (h *bookHandler) DeleteBook(c *gin.Context) {
+	idString := c.Param("id")
+	id, _ := strconv.Atoi(idString)
+
+	b, err := h.bookService.Delete(id)
+
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"errors": err,
+		})
+	}
+
+	bookResponse := convertToBookResponse(b)
+
+	c.JSON(http.StatusOK, gin.H{
+		"data": bookResponse,
 	})
 }
 

main.go

@@ -33,8 +33,10 @@ func main() {
 	v1 := router.Group("/v1")
 	v1.GET("/books", bookHandler.GetBooks)
 	v1.GET("/books/:id", bookHandler.GetBook) // :id akan dapat berubah
+	v1.PUT("/books/:id", bookHandler.UpdateBook)
+	v1.DELETE("/books/:id", bookHandler.DeleteBook)
 
-	v1.POST("/books", bookHandler.PostBooksHandler)
+	v1.POST("/books", bookHandler.CreateBook)
 	//alur post data
 	//ke PostBooksHandler (/handler/book.go/PostBooksHandler)