Laravel选项选择 - 默认问题

Question

Here is my Select Box, Here All Company will be loaded,

But i want to display the Particular company as default selected which i have it in session.

Here is my Code

$sessioncompany = 'ABCcompany'
$comp[''] = 'Company';
@foreach($company_list as $row) 
        <?php
        $comp[$row->CompanyID] = $row->CompanyName;
        ?>
        @endforeach 
 {{ Form::select('CompanyID', $comp, '', array('id' => 'seCompanyID')); }}

What i tried is

 {{ Form::select('CompanyID', $comp, '', array('id' => 'seCompanyID'), array(id=>$sessioncompany)); }}

But i ended with failure

What is the mistake i am doing and How can i fix that ?

Note : I want it in the native laravel method

Answer 1

$selectedId = ... // get the id from the session
{{ Form::select('CompanyID', $comp, array($selectedId), array('id' => 'seCompanyID')) }}

Answer 2

The Form::select() method has the following parameters:

• $name - the name HTML attribute
• (array) $list - the list of options, key-value pairs for actual value => displayed value
• $selected - the selected item's value
• (array) $options - any extra HTML attributes, as per other Form/HTML helper methods

So, the third parameter $selected is the one you want to pass your session value to. Copying your example and replacing:

{{ Form::select('CompanyID', $comp, Session::get('my_session_var'), array('id' => 'seCompanyID')); }}

Where 'my_session_var' is the name of the session variable you store the value of the item that should be selected by default.

The great thing about using Laravel's Form helpers is that you get the 'old' input for free. For example, if you set a default here and the user changes it, submits the form and there's a validation error. When the form is redisplayed (assuming you redirected back with return Redirect::back()->withInput(); ) the value the user selected, rather than your explicit default will be set.

(Thanks to @JarekTkaczyk for putting me right on the old input thing.)

Answer 3

You are passing wrong parameters. max parameters should be 4. Try this:

{{ Form::select('CompanyID', array('default' => $sessioncompany)+$comp, 'default') }}

Answer 4

请注意，如果您在带有选择框的表单的页面上，请确保在测试时刷新每个页面而不使用缓存执行整页刷新 - Ctrl + Shift + R ，否则最后选择的值可能会保留选择。