Question

我想使用Laravel 5.3中的刀片通过表单上的字段连接到数据库。但我真的不知道我是怎么做到的。我会输入主机，用户，密码和数据库名称，当我按下按钮时，它会在屏幕上显示数据库表。我的代码没有连接，只是为了举例说明：

<div class="row">
    <div class="col-lg-3">
        {!! Form::label('sevidor', 'Servidor:', ['class' => 'control-label']) !!}
        {!! Form::text('sevidor', '127.0.0.1', ['class' => 'form-control']) !!}
    </div>
    <div class="col-lg-3">
        {!! Form::label('bancodedados', 'BD:', ['class' => 'control-label']) !!}
        {{ Form::text('bancodedados', null, ['class' => 'form-control']) }}
    </div>
    <div class="col-lg-3">
        {!! Form::label('usuario', 'Usuário:', ['class' => 'control-label']) !!}
        {!! Form::text('usuario', 'root', ['class' => 'form-control']) !!}
    </div>
    <div class="col-lg-3">
        {!! Form::label('senha', 'Senha:', ['class' => 'control-label']) !!}
        <div class="input-group">
            {{ Form::text('senha', null, ['class' => 'form-control']) }}
          <span class="input-group-btn">
            {!! Form::button('Conectar', ['class' => 'btn btn-info']) !!}
          </span>
        </div>
    </div>
</div>

Answer 1

我从问题中了解到您希望动态建立数据库连接，以便您可以像这样创建一个用于即时连接的类

<?php namespace App\Database;

use Config;
use DB;

class OTF {

    /**
     * The name of the database we're connecting to on the fly.
     *
     * @var string $database
     */
    protected $database;

    /**
     * The on the fly database connection.
     *
     * @var \Illuminate\Database\Connection
     */
    protected $connection;

    /**
     * Create a new on the fly database connection.
     *
     * @param  array $options
     * @return void
     */
    public function __construct($options = null)
    {
        // Set the database
        $database = $options['database'];
        $this->database = $database;

        // Figure out the driver and get the default configuration for the driver
        $driver  = isset($options['driver']) ? $options['driver'] : Config::get("database.default");
        $default = Config::get("database.connections.$driver");

        // Loop through our default array and update options if we have non-defaults
        foreach($default as $item => $value)
        {
            $default[$item] = isset($options[$item]) ? $options[$item] : $default[$item];
        }

        // Set the temporary configuration
        Config::set("database.connections.$database", $default);

        // Create the connection
        $this->connection = DB::connection($database);
    }

    /**
     * Get the on the fly connection.
     *
     * @return \Illuminate\Database\Connection
     */
    public function getConnection()
    {
        return $this->connection;
    }

    /**
     * Get a table from the on the fly connection.
     *
     * @var    string $table
     * @return \Illuminate\Database\Query\Builder
     */
    public function getTable($table = null)
    {
        return $this->getConnection()->table($table);
    }
}

然后在用户提交连接设置后，您可以将其称为

// Using the same host/passwword/etc, just changing databases

       $otf = new App\Database\OTF([
            'driver'   => 'pgsql',
            'database' => 'puppies',
            'username' => 'jack',
            'password' => 'the-cute-dog'
          ]);

    // Get the users table
    $users = $otf->getTable('users');

    // Find the first user in the table
    $first_user = $users->first();

https://lukevers.com/2015/03/25/on-the-fly-database-connections-with-laravel-5

或者如果您希望将其作为应用程序的安装程序，则应将这些连接设置保存到应用程序根文件夹中的.env文件

How to change variables in the .env file dynamically in Laravel?

Answer 2

我删除了表单，然后点击我的controller create

$tables = DB::select('SHOW TABLES');
        return view("geradors.create",['tables'=>$tables]);

在我的view中，我选择了我想要使用的表格。很容易。但感谢您的回复。帮助了我很多。

laravel 5按钮连接数据库

2 个答案: