Ordering

app/repository/ordering.go

@@ -0,0 +1,16 @@
+package repository
+
+const ORDERING_ASC = "asc"
+const ORDERING_DESC = "desc"
+
+type Ordering struct {
+	Field     string
+	Direction string
+}
+
+func NewOrdering(field string, direction string) Ordering {
+	return Ordering{
+		Field:     field,
+		Direction: direction,
+	}
+}

app/repository/users.go

@@ -1,6 +1,7 @@
 package repository
 
 import (
+	"fmt"
 	"iris-test/app/models"
 
 	"gorm.io/gorm"
@@ -45,11 +46,24 @@ func applyPagination(db *gorm.DB, pagination *Pagination) *gorm.DB {
 	return query
 }
 
-func (repository *UsersRepository) List(filter *UserFilter, pagination *Pagination) *[]models.User {
+func applyOrdering(db *gorm.DB, ordering *[]Ordering) *gorm.DB {
+	query := db
+
+	if ordering != nil {
+		for _, order := range *ordering {
+			query.Order(fmt.Sprintf("%s %s", order.Field, order.Direction))
+		}
+	}
+
+	return query
+}
+
+func (repository *UsersRepository) List(filter *UserFilter, pagination *Pagination, ordering *[]Ordering) *[]models.User {
 	var users []models.User
 
 	query := repository.db.Model(&models.User{})
 	query = applyFilter(query, filter)
+	query = applyOrdering(query, ordering)
 	query = applyPagination(query, pagination)
 	query.Find(&users)
 

app/views/users.go

@@ -13,7 +13,12 @@ func GetUsersPage(ctx iris.Context) {
 	userRepository := repository.Dao.UsersRepository
 
 	pagination := repository.NewPagination()
-	users := userRepository.List(&repository.UserFilter{}, &pagination)
+	ordering := []repository.Ordering{
+		repository.NewOrdering("first_name", repository.ORDERING_ASC),
+		repository.NewOrdering("last_name", repository.ORDERING_ASC),
+	}
+
+	users := userRepository.List(&repository.UserFilter{}, &pagination, &ordering)
 
 	ctx.ViewData("users", users)