copygen

Example: Manual

The manual example uses manual mapping to match three models.

./domain/domain.go

// Package domain contains business logic models.
package domain

// Account represents a user account.
type Account struct {
	ID     int
	UserID string
	Name   string
	Other  string // The other field is not used.
}

./models/model.go

// Package models contains data storage models (i.e database).
package models

// Account represents the data model for account.
type Account struct {
	ID       int
	Name     string
    Email    string
	Password string
}

YML

# Define where the code is generated.
generated:
  setup: ./setup.go
  output: ../copygen.go

# Templates and custom options aren't used for this example.

Go

The automatcher will match fields from models.Account to domain.Account and the UserID string field to a domain.Account.UserID that has a definition of a string.

// Copygen defines the functions that are generated.
type Copygen interface {
	Basic(A *models.Account, UserID string) *domain.Account
}

Use pointers to avoid allocations.

Output

copygen -yml path/to/yml

// Code generated by github.com/switchupcb/copygen
// DO NOT EDIT.

// Package copygen contains the setup information for copygen generated code.
package copygen

import (
	"github.com/switchupcb/copygen/examples/basic/domain"
	"github.com/switchupcb/copygen/examples/basic/models"
)

// Basic copies a *models.Account, string to a *domain.Account.
func Basic(tA *domain.Account, fA *models.Account, fs string) {
	// *domain.Account fields
	tA.ID = fA.ID
	tA.UserID = fs
	tA.Name = fA.Name
}