如何使用数据库行中请求的布尔值在laravel-php中创建触发器？

Question

So i`m trying to check if my value in row 'Sent' is true or false then i want to create a flip flop which change a html value based on value in that row.

I`ve tried to create a flip flop with 2 variables then i used if statement to compare between database and true/false.

DB migration

 public function up()
    {
        Schema::create('QrCode', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('codes',255);
            $table->timestamp('created_at');
            $table->boolean("sent")->default(0);
            $table->timestamp("sent_at")->nullable();
            $table->boolean("used")->default(0);
            $table->timestamp("used_at")->nullable();
        });
    }

Controller.php

public function update($id)
    {
        $sent = DB::table('qrcode')->where('id', $id)->get(['sent']);
        if ($sent == false) {
            DB::table('qrcode')->where('id', $id)->update(array('sent' => 1, 'sent_at' => now()));
        }
        if ($sent == true){
            DB::table('qrcode')->where('id', $id)->update(array('sent' => 0, 'sent_at' => now()));
        }
        return back();
    }

Blade.php (which i think its not necessary but i will put it here)

<td>
 @if($qrcode->used === 1)
    <b><p name="Yes">Yes</p></b>
 @else
   <b><p>No</p></b>
 @endif
</td>

Routes and Model are well created...my problem is in controller!

Every time i try to change the value,code return always 1 even if the database row is false.

Answer 1

The problem is get returns a collection. You're trying to check against the value.

Try using the value method instead. From the docs:

If you don't even need an entire row, you may extract a single value from a record using the value method.

https://laravel.com/docs/5.8/queries#retrieving-results

$sent = DB::table('qrcode')->where('id', $id)->value('sent');