Repository
This document provides an overview of a repository implementation for common database operations in Golang. The code you provided includes a repository package and a services package, which work together to perform CRUD (Create, Read, Update, Delete) operations on a user entity.
Repository Package
User Repository
The user repository provides methods for interacting with the user entity in the database.
UserOption
The UserOption type is a functional option that allows customization of the user repository.
type UserOption func(repository.IRepository[models.User])User
The User variable is a function that creates a new instance of the user repository with optional customizations.
var User = func(c core.IContext, options ...UserOption) repository.IRepository[models.User] {
// Create a new repository instance
r := repository.New[models.User](c)
// Apply optional customizations
for _, opt := range options {
opt(r)
}
return r
}UserSimple
The UserSimple variable is a function that creates a new instance of the user repository without any customizations.
var UserSimple = func(c core.IContext) repository.IRepository[models.User] {
return repository.New[models.User](c)
}UserOrderBy
The UserOrderBy function is a user repository option that sets the order for retrieving user records.
func UserOrderBy(pageOptions *core.PageOptions) UserOption {
return func(c repository.IRepository[models.User]) {
if len(pageOptions.OrderBy) == 0 {
c.Order("created_at DESC")
} else {
c.Order(pageOptions.OrderBy)
}
}
}Services Package
User Service Interface
The IUserService interface defines the contract for user-related operations.
type IUserService interface {
Create(input *UserCreatePayload) (*models.User, core.IError)
Update(id string, input *UserUpdatePayload) (*models.User, core.IError)
Find(id string) (*models.User, core.IError)
Pagination(pageOptions *core.PageOptions) (*repository.Pagination[models.User], core.IError)
Delete(id string) core.IError
}User Service Implementation
The userService struct implements the IUserService interface.
type userService struct {
ctx core.IContext
}Create
The Create method creates a new user entity.
func (s userService) Create(input *UserCreatePayload) (*models.User, core.IError) {
// Implementation for creating a user
// ...
return s.Find(user.ID)
}Update
The Update method updates an existing user entity.
func (s userService) Update(id string, input *UserUpdatePayload) (*models.User, core.IError) {
// Implementation for updating a user
// ...
return s.Find(user.ID)
}Find
The Find method retrieves a user entity by ID.
func (s userService) Find(id string) (*models.User, core.IError) {
// Implementation for finding a user
// ...
return repo.User(s.ctx).FindOne("id = ?", id)
}Pagination
The Pagination method performs pagination on user entities.
func (s userService) Pagination(pageOptions *core.PageOptions) (*repository.Pagination[models.User], core.IError) {
// Implementation for user pagination
// ...
return repo.User(s.ctx, repo.UserOrderBy(pageOptions)).Pagination(pageOptions)
}Delete
The Delete method deletes a user entity by ID.
func (s userService) Delete(id string) core.IError {
// Implementation for deleting a user
// ...
return repo.User(s.ctx).Delete("id = ?", id)
}This concludes the overview of the repository for common database operations in Golang. The provided code demonstrates the implementation of CRUD operations on a user entity using a repository pattern.