Php 如何通过Laravel 5.2一次更新特定列数据？

我有一个

users

表，其中有一列

名为
rank\u id
。现在我想一次将所有用户
rank\u id
更新为
2
，其中
rank\u id=6
（单击一个按钮）。我该怎么做？到目前为止，我已经尝试过：

路线：

Route::post('/test/rankup2', array('as' => 'user.rank2.post', 'uses' => 'TestController@RankUpgradeTwo'));

function RankUpgradeTwo(Request $request)
{
    $memberAll = User::where('rank_id','=',6)->firstOrFail();
    //dd($memberAll);

    $memberAll->rank_id = '2';

    $memberAll->save();
    return Redirect::to('user/test')->with('message', 'Successfully Ugraded into Rank 2');

}

    <form method="POST"
        action="{{ route('user.rank2.post') }}"
        class="form-horizontal stdform"
        autocomplete="off"
        enctype="multipart/form-data"
        id="edit-form"
        role="form"
        {{--v-on:submit="submitChange" --}}
        novalidate />
    {{ csrf_field() }}


<div class="control-group action">


    <button type="submit" name="submit" value="submit" id="submit" class="btn btn-blue btn-left">
       Rank Up 2
    </button>       

</div>

{{ Form::close() }}

TestController.php:

Route::post('/test/rankup2', array('as' => 'user.rank2.post', 'uses' => 'TestController@RankUpgradeTwo'));

function RankUpgradeTwo(Request $request)
{
    $memberAll = User::where('rank_id','=',6)->firstOrFail();
    //dd($memberAll);

    $memberAll->rank_id = '2';

    $memberAll->save();
    return Redirect::to('user/test')->with('message', 'Successfully Ugraded into Rank 2');

}

    <form method="POST"
        action="{{ route('user.rank2.post') }}"
        class="form-horizontal stdform"
        autocomplete="off"
        enctype="multipart/form-data"
        id="edit-form"
        role="form"
        {{--v-on:submit="submitChange" --}}
        novalidate />
    {{ csrf_field() }}


<div class="control-group action">


    <button type="submit" name="submit" value="submit" id="submit" class="btn btn-blue btn-left">
       Rank Up 2
    </button>       

</div>

{{ Form::close() }}

testScript.blade.php:

Route::post('/test/rankup2', array('as' => 'user.rank2.post', 'uses' => 'TestController@RankUpgradeTwo'));

function RankUpgradeTwo(Request $request)
{
    $memberAll = User::where('rank_id','=',6)->firstOrFail();
    //dd($memberAll);

    $memberAll->rank_id = '2';

    $memberAll->save();
    return Redirect::to('user/test')->with('message', 'Successfully Ugraded into Rank 2');

}

    <form method="POST"
        action="{{ route('user.rank2.post') }}"
        class="form-horizontal stdform"
        autocomplete="off"
        enctype="multipart/form-data"
        id="edit-form"
        role="form"
        {{--v-on:submit="submitChange" --}}
        novalidate />
    {{ csrf_field() }}


<div class="control-group action">


    <button type="submit" name="submit" value="submit" id="submit" class="btn btn-blue btn-left">
       Rank Up 2
    </button>       

</div>

{{ Form::close() }}


{{csrf_field（）}}
排名第二
{{Form:：close（）}}

这向我显示成功消息，但我在数据库中未看到任何更新。提前谢谢。
你可以试试

或

因为
firstOrFail
将只从数据库中获取第一条记录，因此您无法更新所有记录，但对于该e.x还有另一个解决方法

$memberAll = User::where('rank_id','=',6)->get();
foreach($memberAll as $member) {
    $member->rank_id = 2;
    $member->save();
}

你可以试试

或

因为
firstOrFail
将只从数据库中获取第一条记录，因此您无法更新所有记录，但对于该e.x还有另一个解决方法

$memberAll = User::where('rank_id','=',6)->get();
foreach($memberAll as $member) {
    $member->rank_id = 2;
    $member->save();
}

完美的谢谢，太好了！。。。多谢。