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go-dto's Introduction

Package for conversation different request forms to Service layer DTO (Data Transfer Object).

Structure tags (default dto) available for linking fields with different names in source or destination structure, also snake_case tags will be assigned to CamelCase.

For example:

type SignUpStep1Form struct {
	Firstname string `json:"firstname" validate:"attr=firstname,min=1,max=50" dto:"name"`
	Lastname  string `json:"lastname" validate:"attr=lastname,max=50"`
}

type SignUpStep2Form struct {
	Username  string `json:"username" validate:"attr=username,min=3,max=32"`
	Email     string `json:"email" validate:"attr=email,email" dto:"contact_email"`
}
type SignUpDTO struct {	
	Name             string
	Lastname         string
        Path             string `dto:"username"`
	ContactEmail     string  
}
	formDTO := SignUpDTO{}
	err := dto.RequestToDTO(&formDTO, &requestStep1, &requestStep2)

Controller

package controllers

import (
	"github.com/censync/go-api-structure/service"
	"github.com/censync/go-dto"
	"github.com/censync/go-validator"
	"github.com/gin-gonic/gin"
)

// Input JSON form with validation rules
type SignUpForm struct {
	Username  string `json:"username" validate:"attr=username,min=3,max=32"`
	Firstname string `json:"firstname" validate:"attr=firstname,min=1,max=50"`
	Lastname  string `json:"lastname" validate:"attr=lastname,max=50"`
	Email     string `json:"email" validate:"attr=email,email"`
}

type SignUpDTO struct {
	Username  string
	Firstname string
	Lastname  string
	Email     string
}

func TestMethod(ctx *gin.Context) {
	request := SignUpForm{}
	
    ctx.BindJSON(&request)

	errs := validator.Validate(&request)

	if !errs.IsEmpty() {
		ctx.JSON(400, errs)
		return
	}

	formDTO := SignUpDTO{}

	err := dto.RequestToDTO(&formDTO, &request)

	if err != nil {
		ctx.JSON(400, map[string]string{
			"error": err.Error(),
		})
		return
	}

	err = service.AppService().SignUp(&formDTO)

	if err != nil {
		ctx.JSON(400, map[string]string{
			"error": err.Error(),
		})
		return
	}

	ctx.Status(200)
	return
}

Service

func (s *Service) SignUp(dto *SignUpDTO) error {
	// Process user sign up
}

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