How to set disabled select option in Laravel?

Question

In a controller function, I extract all the attributes and the attributes that I have already used.

All the attributes:

$attributeNames = array('' => 'Select Attribute Name') + AttributeName::lists('name' , 'id');

Already Taken Attributes:

$selectedAttributeNames = $xmlDocument->masterInformation->masterAttributes;

How can I make the selectedAttributeNames as disable please?

Here is the output of var_dump($selectedAttributeNames):

object(Illuminate\ Database\ Eloquent\ Collection) #312 (1) {
    ["items":protected]= > array(1) {
        [0] => object(MasterAttribute) #310 (20) {
            ["table":protected]= > string(16) "master_attribute"
            ["guarded": protected] => array(1) {
                [0] => string(2) "id"
            }
            ["connection": protected] => NULL["primaryKey": protected] => string(2) "id"
            ["perPage": protected] => int(15)["incrementing"] => bool(true)["timestamps"] => bool(true)["attributes": protected] => array(7) {
                ["id"] => int(1)["xpath"] => string(17)
                "this is the xpath"
                ["attribute_name_id"] => int(1)["master_information_id"] => int(6)["default_value"] => string(25) "This is the default value"
                ["created_at"] => string(19) "2014-07-19 17:53:55"
                ["updated_at"] => string(19) "2014-07-19 17:53:55"
            }
            ["original": protected] => array(7) {
                ["id"] => int(1)["xpath"] => string(17) "this is the xpath"
                ["attribute_name_id"] => int(1)["master_information_id"] => int(6)["default_value"] => string(25) "This is the default value"
                ["created_at"] => string(19) "2014-07-19 17:53:55"
                ["updated_at"] => string(19) "2014-07-19 17:53:55"
            }
            ["relations": protected] => array(0) {}
            ["hidden": protected] => array(0) {}
            ["visible": protected] => array(0) {}
            ["appends": protected] => array(0) {}
            ["fillable": protected] => array(0) {}
            ["dates": protected] => array(0) {}
            ["touches": protected] => array(0) {}
            ["observables": protected] => array(0) {}
            ["with": protected] => array(0) {}
            ["morphClass": protected] => NULL["exists"] => bool(true)
        }
    }
}

Answer 1

Unfortunately Laravel's Form::select() helper method doesn't provide a way to tap into the process of building html for select's options.

That being said you have several ways to go about it:

First: You can create your own form macro. Here is oversimplified version

Form::macro('select2', function($name, $list = [], $selected = null, $options = [], $disabled = []) {
    $html = '<select name="' . $name . '"';
    foreach ($options as $attribute => $value) {
        $html .= ' ' . $attribute . '="' . $value . '"';
    }
    $html .= '">';
    foreach ($list as $value => $text) {
        $html .= '<option value="' . $value . '"' .
            ($value == $selected ? ' selected="selected"' : '') .
            (in_array($value, $disabled) ? ' disabled="disabled"' : '') . '>' .
            $text . '</option>';
    }
    $html .= '</select>';
    return $html;
});

which you can register for example in start.php.

Given that you first get convert Illuminate Collection with already selected items into a plain array of keys

$selectedAttributeNames = $xmlDocument->masterInformation->masterAttributes;
$disabled = $selectedAttributeNames->toArray();

and maker both $attributeNames and $disabled available in your view you can use your custom macro like this

{{ Form::select2('mydropdown', $attributeNames, null, [], $disabled) }}

Second: you can just remove (e.g. with array_diff_key()) already selected items from your array of options instead of disabling them:

{{ Form::select('mydropdown2', array_diff_key($attributeNames, $disabled), null, []) }}

Third: in your view you can spit a JavaScript array of already selected attributes that need to be disabled and do the rest client-side with jQuery or vanilla JS.