Share the preliminary use of ChatGPT (laravel and go examples)

Initial use of ChatGPT

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Write a laravel file upload example

The following is a file upload example using the Laravel framework:

1. Create a form , which contains a file selector:

 @csrf  上传文件 

2. Handle file uploads in the controller:

public function upload(Request $request) { $file = $request->file('file'); $path = $file->store('public/uploads'); return back()->with('success', '文件已成功上传！'); }

3. Define routes in routes/web.php:

Route::post('/upload', [MyController::class, 'upload'])->name('upload');

This is a basic file upload example. You can do more after uploading, such as verifying file type or size, saving file metadata, and more.

laravel Queue Usage Example

The following are examples of using queues in the Laravel framework:

1. Add tasks to the queue in the controller:

use Illuminate\Support\Facades\Queue; public function addToQueue(Request $request) { $data = ['message' => 'Hello, this is a demo message!']; Queue::push(new DemoJob($data)); return back()->with('success', '任务已成功添加到队列！'); }

2. Create a queue task:

use Illuminate\Bus\Queueable; use Illuminate\Contracts\Queue\ShouldQueue; use Illuminate\Foundation\Bus\Dispatchable; use Illuminate\Queue\InteractsWithQueue; use Illuminate\Queue\SerializesModels; class DemoJob implements ShouldQueue { use Dispatchable, InteractsWithQueue, Queueable, SerializesModels; protected $data; public function __construct($data) { $this->data = $data; } public function handle() { Log::info('DemoJob', $this->data); } }

This is just a simple example of a queue. You can use Laravel's queuing system to process large, time-consuming tasks asynchronously to improve the performance of your application.

How to start the queue in laravel

The method to start the queue in the Laravel framework is as follows:

1. Use the Artisan command line tool to start the queue listener:

php artisan queue:listen

2. Use Supervisor to manage the queue listener process:

[program:laravel-worker] process_name=%(program_name)s_%(process_num)02d command=php /path/to/your/laravel/installation/artisan queue:work --sleep=3 --tries=3 autostart=true autorestart=true user=www-data numprocs=8 redirect_stderr=true stdout_logfile=/path/to/your/laravel/installation/worker.log

Note: You need to install and configure Supervisor before you can use this method to start the queue.

Both methods can be used to start the queue in a production environment, but the second method is recommended because it can automatically restart failed tasks.

laravel orm usage examples

The following are examples of using ORM in the Laravel framework:

1. Define the model:

namespace App; use Illuminate\Database\Eloquent\Model; class User extends Model { protected $table = 'users'; protected $fillable = ['name', 'email', 'password']; }

2. Add data:

$user = new User(); $user->name = 'John Doe'; $user->email = 'johndoe@example.com'; $user->password = bcrypt('password'); $user->save();

3. Query data:

$users = User::all(); foreach ($users as $user) { echo $user->name . '
'; } $user = User::find(1); echo $user->name; $user = User::where('name', 'John Doe')->first(); echo $user->email;

4. Update data:

$user = User::find(1); $user->name = 'Jane Doe'; $user->save();

5. Delete data:

$user = User::find(1); $user->delete();

This is just A simple example of an ORM. The ORM system of the Laravel framework has powerful features, supports various relationships (such as one-to-many, many-to-many, etc.) and can easily interact with the database.

Examples of database usage in go

The following are examples of database usage in Go language:

1. Import the database driver package:

import ( "database/sql" _ "github.com/go-sql-driver/mysql" )

2. Open database connection:

db, err := sql.Open("mysql", "user:password@tcp(host:port)/database") if err != nil { panic(err) } defer db.Close()

3. Add data:

stmt, err := db.Prepare("INSERT INTO users(name, email) VALUES(?, ?)") if err != nil { panic(err) } defer stmt.Close() res, err := stmt.Exec("John Doe", "johndoe@example.com") if err != nil { panic(err) } id, err := res.LastInsertId() if err != nil { panic(err) } fmt.Println("Last insert ID:", id)

4. Query data:

rows, err := db.Query("SELECT * FROM users") if err != nil { panic(err) } defer rows.Close() for rows.Next() { var id int var name string var email string if err := rows.Scan(&id, &name, &email); err != nil { panic(err) } fmt.Println(id, name, email) } if err := rows.Err(); err != nil { panic(err) }

5. Update data:

stmt, err := db.Prepare("UPDATE users SET name=? WHERE id=?") if err != nil { panic(err) } defer stmt.Close() res, err := stmt.Exec("Jane Doe", 1) if err != nil { panic(err) } affected, err := res.RowsAffected() if err != nil { panic(err) } fmt.Println("Rows affected:", affected)

6. Delete data:

stmt, err := db.Prepare("DELETE FROM users WHERE id=?") if err != nil { panic(err) } defer stmt.Close() res, err := stmt.Exec(1) if err != nil { panic(err) } affected, err := res.RowsAffected() if err != nil { panic(err) } fmt.Println("Rows affected:", affected)

This is just using Go language

Recommended learning: "laravel video tutorial"

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