Question

我是Laravel技术的新手。我正在做一个简单的项目，管理员注册他有停车区空间，用户可以预订停车区空间。我面临的问题是用户可以在任何日期预订停车位。例如，有10个停车位。如果下周有5位用户预订，明天有2位用户预订。明天它应该显示8，然后后天它将重置为其原始值10和下周如果5个用户预订剩余空间应该是5.如何在Laravel中执行此操作。

我有以下代码。

USER_TABLE：

 public function up()
 {
    Schema::create('user_table', function (Blueprint $table) {
        $table->increments('id');
        $table->string('userId');
        $table->string('userName');
        $table->string('userEmailId');
        $table->string('area');
        $table->integer('areaId');
        $table->string('date');
        $table->string('phNo');
        $table->integer('spacecount');
        //$table->timestamps();
    });
}

public function down()
{
    Schema::drop('user_table');
}

Vendor_table：

 public function up()
 {
    Schema::create('vendor_table', function (Blueprint $table) {
        $table->increments('id');
        $table->string('vendorName');
        $table->string('vendorArea');
        $table->string('areaId');
        $table->string('vendorEmailId');
        $table->integer('vendorAvailableSpace');
        $table->string('phNo');
        $table->string('adress');
       // $table->timestamps();
    });
}

public function down()
{
    Schema::drop('vendor_table');
}

用户模型：

protected $table = 'user_table';
public $timestamps = false;

供应商模型：

protected $table = 'vendor_table';
public $timestamps = false;

供应商控制器：

public function add(Request $request)
{
    $generateUniqueId = new GenerateUUID();
    $vendorId = $generateUniqueId->getUniqueId();

    $generateUniqueId = new GenerateUUID();
    $areaId = $generateUniqueId->getUniqueId();

    $vendor = new Vendor();
    $vendor->vendorId = $vendorId;
    $vendor->vendorName = $request->input('vendorName');
    $vendor->vendorArea = $request->input('vendorArea');
    $vendor->areaId = $areaId;
    $vendor->vendorEmailId = $request->input('vendorEmailId');
    $vendor->vendorAvailableSpace = $request->input('vendorAvailableSpace');
    $vendor->phNo = $request->input('phNo');
    $vendor->address = $request->input('address');
    $vendor->save();

    if (!$vendor->save())
    {
        return 3001;
    }

    else
    {
        return 3000;
    }

用户控制器：

public function book(Request $request)
{

   $checkCount = Vendor::where('vendorAvailableSpace',$request->input('vendorAvailableSpace'))->first();
    Log::info($checkCount);

    if(count($checkCount) > 0) {
        $generateUniqueId = new GenerateUUID();
        $userId = $generateUniqueId->getUniqueId();

        $user = new UserModel();
        $user->userId = $userId;
        $user->userName = $request->input('userName');
        $user->userEmailId = $request->input('userEmailId');
        $user->area = $request->input('area');
        $user->areaId = $request->input('areaId');
        $user->date = $request->input('date');
        $user->phNo = $request->input('phNo');
        $user->save();

        if (!$user->save())
        {
            return 4001;
        }
        else
        {
             Vendor::where('vendor_table.areaId', $request->input('areaId'))
            ->join('user_table','user_table.areaId','=','vendor_table.areaId')
            ->where('user_table.date',$request->input('date'))->decrement('vendor_table.vendorAvailableSpace');
            return 4000;
        }
    }

    else
    {
        return 4002;
    }

Answer 1

这里需要一个单独的表来管理每天的计数。

<强>移植

public function up()
    {
        Schema::create('whateverNameYouLikeTo', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->unsignedBigInteger('vendor_id');
            $table->integer('sunday');
            $table->integer('monday');
            $table->integer('tuesday');
            $table->integer('wednesday');
            $table->integer('thursday');
            $table->integer('friday');
            $table->integer('saturday');
            $table->timestamps();
        });
        Schema::table('vendorTable', function (Blueprint $table) {
            //Foreign Keys
            $table->foreign('vendor_id')->references('id')->on('vendorTable')->onDelete('cascade')->onUpdate('cascade');
        });

    }

首先，您需要在注册时在此表中设置这些值，就像您在与外键聊天中提到的那样，您将在注册时获得vendor_id。

然后，每当你减少一个值，你需要更新值，在这里你需要检查一天是否有星期日你需要修改星期日数据，你可以使用这样的急切加载

对于日期操作，我建议您使用Carbon阅读此处的文档以获得更好的洞察力，然后您可以使用以下碳：

if($today == sunday) {
$vendorAvailableSpace->sunday = $value;
}

如何在日期更改时重置表中列的值

1 个答案: