Discuss how to change data in Laravel

Laravel is an excellent PHP web application framework. Laravel draws on the design ideas of other programming languages ​​and frameworks, and provides an efficient way to develop web applications by using concise and beautiful syntax. In this article, we will focus on how to change data in Laravel.

Changing data in Laravel mainly refers to database operations, including additions, deletions, modifications, etc. Among them, methods to change data include directly using SQL statements, using ORM methods, etc. Here, we will focus on how to edit/update data using Laravel's own Eloquent ORM.

Eloquent ORM is a simple and elegant way in the Laravel framework for interacting with databases. By using Eloquent Model, you can easily map database tables to PHP objects and directly manipulate database data through object methods. The following is an example of using Eloquent ORM to update data in Laravel:

First, define an Eloquent Model:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    protected $table = &#39;users&#39;;
}

In the Controller, define the method to update data:

public function update(Request $request, $id)
{
    $user = User::find($id);
    $user->name = $request->input('name');
    $user->email = $request->input('email');
    $user->save();
    
    return redirect('/users');
}

In the routing file, define the route for updating data:

Route::put('/users/{id}', 'UserController@update');

Then, in the view file, we can use Laravel's form operation to define a form that submits data to the updating data route:

<form method="POST" action="/users/{{ $user->id }}">
    {{ csrf_field() }}
    {{ method_field('PUT') }}
    <input type="text" name="name" value="{{ $user->name }}">
    <input type="text" name="email" value="{{ $user->email }}">
    <button type="submit">Save</button>
</form>

In this form, we use Laravel's routing method and CSRF protection method to define a PUT request and a hidden _form field. In this way, we can use User::find($id) in the Controller to get the User object to be updated. We can also update the properties of an object through object methods and save the changes to the database using the $object->save() method.

In summary, there are the following steps to change data in Laravel:

1. Define an Eloquent Model;

2. Define a Controller method to update data, Access the database and update data through Eloquent Model;

3. Define a route to update data, and use Laravel's form operation to submit the form;

4. Use Eloquent Model in the view to access the data to be updated The data.

There are some things you need to pay attention to when updating the database using Laravel. First, like other programming tasks, security is always a priority. Never trust data passed to you directly, use Laravel's Request to validate the request. Secondly, when updating data, it is best to verify the properties of the updated data first, in order to avoid unnecessary operations when there is no data. Finally, use Laravel's logging and Debugbar to aid debugging.

Thank you for reading this article, I hope you have a better understanding of changing data in Laravel!

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