Добавил валидацию данных в контроллер производителей.

Добавил Удаление, Просмотр всех производителей.

controllers/manufacturerController.go

@@ -2,20 +2,36 @@ package controllers
 
 import (
 	"github.com/gin-gonic/gin"
+	"github.com/go-playground/validator/v10"
 	"golang-test/database"
+	"golang-test/libs"
 	"golang-test/message"
+	"golang-test/validators"
 	"log"
 )
 
 func CreateManufacturer(c *gin.Context, manufacturer database.Manufacturer) {
 	db := database.Connector()
-
+	validate := validators.Validate
 	response := message.Response{Status: 200}
 
-	err := db.Create(&manufacturer).Error
+	err := validate.Struct(manufacturer)
+
+	if err != nil {
+		response.Error = libs.GetValidationErrors(err.(validator.ValidationErrors))
+		response.Status = 400
+		message.SendResponse(c, response)
+		return
+	}
+
+	err = db.Create(&manufacturer).Error
+
 	if err != nil {
 		log.Println(err.Error())
-		response.Error = append(response.Error, err.Error())
+		response.Error = gin.H{
+			"error": err.Error(),
+		}
+
 		response.Status = 500
 		message.SendResponse(c, response)
 		return
@@ -27,3 +43,48 @@ func CreateManufacturer(c *gin.Context, manufacturer database.Manufacturer) {
 
 	message.SendResponse(c, response)
 }
+
+func DeleteManufacturer(c *gin.Context) {
+	db := database.Connector()
+	response := message.Response{Status: 200}
+
+	id := c.Param("id")
+
+	var manufacturer database.Manufacturer
+
+	if db.First(&manufacturer, id).Error != nil {
+		response.Error = gin.H{
+			"error": "Manufacturer with id '" + id + "' not found",
+		}
+		response.Status = 404
+		message.SendResponse(c, response)
+		return
+	}
+
+	db.Delete(&manufacturer, id)
+
+	response.Message = gin.H{
+		"message": "Manufacturer deleted",
+	}
+	message.SendResponse(c, response)
+}
+
+func GetManufacturers(c *gin.Context) {
+
+	type ManufacturerResponse struct {
+		ID   uint
+		Name string
+	}
+
+	db := database.Connector()
+	response := message.Response{Status: 200}
+	var manufacturers []ManufacturerResponse
+
+	db.Model(&database.Manufacturer{}).Select("ID", "Name").Scan(&manufacturers)
+
+	response.Message = gin.H{
+		"manufacturers": manufacturers,
+	}
+
+	message.SendResponse(c, response)
+}

database/models.go

@@ -4,7 +4,7 @@ import "gorm.io/gorm"
 
 type Manufacturer struct {
 	gorm.Model
-	Name string `gorm:"unique"`
+	Name string `gorm:"unique" validate:"required,custom_unique=Name"`
 }
 
 type Product struct {

golang-test/Manufacturer/Create Manufacturer.bru

@@ -1,11 +1,11 @@
 meta {
-  name: ManufacturerCreate
+  name: Create Manufacturer
   type: http
-  seq: 3
+  seq: 1
 }
 
 post {
-  url: http://localhost:8080/manufacturer
+  url: {{host}}/manufacturer
   body: json
   auth: basic
 }

golang-test/Manufacturer/Delete Manufacturer.bru

@@ -0,0 +1,11 @@
+meta {
+  name: Delete Manufacturer
+  type: http
+  seq: 2
+}
+
+delete {
+  url: {{host}}/manufacturer/{{manufacturerID}}
+  body: none
+  auth: none
+}

golang-test/Manufacturer/Get All Manufacturers.bru

@@ -0,0 +1,11 @@
+meta {
+  name: Get All Manufacturers
+  type: http
+  seq: 3
+}
+
+get {
+  url: {{host}}/manufacturer
+  body: none
+  auth: none
+}

golang-test/Product/ProductCreate.bru

@@ -1,11 +1,11 @@
 meta {
   name: ProductCreate
   type: http
-  seq: 2
+  seq: 1
 }
 
 post {
-  url: http://localhost:8080/product
+  url: {{host}}/product
   body: json
   auth: none
 }

golang-test/environments/golang-test.bru

@@ -0,0 +1,4 @@
+vars {
+  host: http://localhost:8080
+  manufacturerID: 3
+}

libs/libs.go

@@ -0,0 +1,29 @@
+package libs
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/go-playground/validator/v10"
+	"strings"
+)
+
+func GetValidationErrors(errs validator.ValidationErrors) gin.H {
+	errors := make(map[string]any)
+	for _, err := range errs {
+		errors[err.Field()] = err.Error()
+	}
+
+	return gin.H{
+		"error": errors,
+	}
+}
+
+func ToSnakeCase(str string) string {
+	var result []rune
+	for i, r := range str {
+		if i > 0 && 'A' <= r && r <= 'Z' {
+			result = append(result, '_')
+		}
+		result = append(result, r)
+	}
+	return strings.ToLower(string(result))
+}

main.go

@@ -36,7 +36,18 @@ func main() {
 		controllers.CreateManufacturer(c, manufacturer)
 	})
 
-	r.Run()
+	r.DELETE("/manufacturer/:id", func(c *gin.Context) {
+		controllers.DeleteManufacturer(c)
+	})
+
+	r.GET("/manufacturer", func(c *gin.Context) {
+		controllers.GetManufacturers(c)
+	})
+
+	err := r.Run()
+	if err != nil {
+		return
+	}
 
 	defer func() {
 		db := database.Connector()
@@ -44,7 +55,9 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
-		if err := sqlDB.Close(); err != nil {
+
+		err = sqlDB.Close()
+		if err != nil {
 			log.Println(err)
 		}
 	}()

message/message.go

@@ -7,13 +7,13 @@ import (
 type Response struct {
 	Status  int
 	Message gin.H
-	Error   []string
+	Error   gin.H
 }
 
 func SendResponse(c *gin.Context, response Response) {
 	if len(response.Message) > 0 {
 		c.JSON(response.Status, response.Message)
 	} else if len(response.Error) > 0 {
-		c.JSON(response.Status, gin.H{"errors": response.Error})
+		c.JSON(response.Status, response.Error)
 	}
 }

migrations/migration.go

@@ -4,6 +4,7 @@ import (
 	"golang-test/database"
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
+	"log"
 )
 
 func main() {
@@ -13,8 +14,11 @@ func main() {
 		panic("failed to connect database")
 	}
 	// Migrate the schema
-	db.AutoMigrate(&database.Manufacturer{}, &database.Product{}, &database.User{})
-
+	err = db.AutoMigrate(&database.Manufacturer{}, &database.Product{}, &database.User{})
+	if err != nil {
+		return
+	}
+	log.Println("Database migration complete")
 }
 
 //func Test(db *gorm.DB) string {

validators/validators.go

@@ -0,0 +1,33 @@
+package validators
+
+import (
+	"fmt"
+	"github.com/go-playground/validator/v10"
+	"golang-test/database"
+	"golang-test/libs"
+	"log"
+)
+
+var Validate *validator.Validate
+
+func init() {
+	Validate = validator.New()
+	err := Validate.RegisterValidation("custom_unique", UniqueValidator)
+	if err != nil {
+		return
+	}
+}
+
+func UniqueValidator(fl validator.FieldLevel) bool {
+	db := database.Connector()
+
+	field := fl.Field().String()
+	structType := libs.ToSnakeCase(fl.Top().Type().Name()) + "s"
+	param := fl.Param()
+	log.Println(field, structType, param)
+
+	var count int64
+	db.Table(structType).Where(fmt.Sprintf("%s = ?", param), field).Count(&count)
+
+	return count == 0
+}