## Table Of Contents * [Introduction](#introduction) * [Setting Up the Project](#setting-up-the-project) * [Creating the Todo Model](#creating-the-todo-model) * [Implementing the CRUD Operations](#implementing-the-crud-operations) * [Create Todo](#create-todo) * [Get Todos](#get-todos) * [Update Todo](#update-todo) * [Delete Todo](#delete-todo) * [Testing the API](#testing-the-api) * [Conclusion](#conclusion) --- ## Introduction Building a REST API can seem daunting, but with Go, it’s straightforward. In this guide, we’ll create a simple Todo REST API that allows users to manage their tasks efficiently. --- ## Setting Up the Project To start, make sure you have Go installed on your machine. Create a new directory for your project and initialize a new Go module: ```bash mkdir todorest cd todorest go mod init todorest ``` Install the required packages: ```bash go get github.com/gin-gonic/gin ``` --- ## Creating the Todo Model First, we need to define our Todo model. Create a new file called `models.go`: ```go package models type Todo struct { ID int `json:"id"` Title string `json:"title"` Status string `json:"status"` } ``` --- ## Implementing the CRUD Operations ### Create Todo To create a new todo item, add the following handler in your main file: ```go func CreateTodo(c *gin.Context) { var todo models.Todo if err := c.ShouldBindJSON(&todo); err != nil { c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"}) return } result, err := config.DB.Exec("INSERT INTO todos (title, status) VALUES (?, ?)", todo.Title, todo.Status) if err != nil { c.JSON(http.StatusInternalServerError, gin.H{"error": "Unable to create todo"}) return } id, _ := result.LastInsertId() todo.ID = int(id) c.JSON(http.StatusCreated, todo) } ``` ### Get Todos To fetch all todo items, implement the following handler: ```go func GetTodos(c *gin.Context) { rows, err := config.DB.Query("SELECT id, title, status FROM todos") if err != nil { c.JSON(http.StatusInternalServerError, gin.H{"error": "Unable to fetch todos"}) return } defer rows.Close() var todos []models.Todo for rows.Next() { var todo models.Todo if err := rows.Scan(&todo.ID, &todo.Title, &todo.Status); err != nil { c.JSON(http.StatusInternalServerError, gin.H{"error": "Error scanning todo"}) return } todos = append(todos, todo) } c.JSON(http.StatusOK, todos) } ``` ### Update Todo To update an existing todo item, you can use: ```go func UpdateTodo(c *gin.Context) { id := c.Param("id") var todo models.Todo if err := c.ShouldBindJSON(&todo); err != nil { c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"}) return } _, err := config.DB.Exec("UPDATE todos SET title = ?, status = ? WHERE id = ?", todo.Title, todo.Status, id) if err != nil { c.JSON(http.StatusInternalServerError, gin.H{"error": "Unable to update todo"}) return } c.JSON(http.StatusOK, todo) } ``` ### Delete Todo To delete a todo item, implement the following function: ```go func DeleteTodo(c *gin.Context) { id := c.Param("id") _, err := config.DB.Exec("DELETE FROM todos WHERE id = ?", id) if err != nil { c.JSON(http.StatusInternalServerError, gin.H{"error": "Unable to delete todo"}) return } c.JSON(http.StatusOK, gin.H{"message": "Todo deleted"}) } ``` --- ## Testing the API To test your API, you can use tools like Postman or CURL. Make sure your server is running, and send requests to the appropriate endpoints. --- [View the Todo REST API on GitHub](https://github.com/HARISHKUMAR023/todoms-golang) ## Conclusion You have successfully built a Todo REST API in Go! You can extend its functionality by adding more features like authentication, filtering, and pagination. For further reading, check out the [official Go documentation](https://golang.org/doc/) for more details on the Go language and its capabilities. ---

harishkumar023

🚀 Building a REST API in Go: A Step-by-Step Guide

Join Our Newsletter. No Spam, Only the good stuff.