Validation

2024-03-11 18:54| 来源: 网络整理| 查看: 265

Validation Introduction Validation Quickstart Defining the Routes Creating the Controller Writing the Validation Logic Displaying the Validation Errors Repopulating Forms A Note on Optional Fields Validation Error Response Format Form Request Validation Creating Form Requests Authorizing Form Requests Customizing the Error Messages Preparing Input for Validation Manually Creating Validators Automatic Redirection Named Error Bags Customizing the Error Messages Performing Additional Validation Working With Validated Input Working With Error Messages Specifying Custom Messages in Language Files Specifying Attributes in Language Files Specifying Values in Language Files Available Validation Rules Conditionally Adding Rules Validating Arrays Validating Nested Array Input Error Message Indexes and Positions Validating Files Validating Passwords Custom Validation Rules Using Rule Objects Using Closures Implicit Rules

Introduction

Laravel provides several different approaches to validate your application's incoming data. It is most common to use the validate method available on all incoming HTTP requests. However, we will discuss other approaches to validation as well.

Laravel includes a wide variety of convenient validation rules that you may apply to data, even providing the ability to validate if values are unique in a given database table. We'll cover each of these validation rules in detail so that you are familiar with all of Laravel's validation features.

Validation Quickstart

To learn about Laravel's powerful validation features, let's look at a complete example of validating a form and displaying the error messages back to the user. By reading this high-level overview, you'll be able to gain a good general understanding of how to validate incoming request data using Laravel:

Defining the Routes

First, let's assume we have the following routes defined in our routes/web.php file:

use App\Http\Controllers\PostController; Route::get('/post/create', [PostController::class, 'create']);Route::post('/post', [PostController::class, 'store']);

The GET route will display a form for the user to create a new blog post, while the POST route will store the new blog post in the database.

Creating the Controller

Next, let's take a look at a simple controller that handles incoming requests to these routes. We'll leave the store method empty for now:

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