Yii2 Arraydataprovider custom value

Question

First of all, I'm really disappointed after all googling and getting nothing!

I have an Arraydataprovider called

$data = [
    400 => [
        'name' => 'x',
        'lesson_1' => '10',
        'lesson_2' => '9',
        ...
    ],
    389 => ...
]

It's generated in a for loop.

I want the values to be shown in a text box :

foreach($lessons as $lid => $name) {
        $attrs[] = [
                'attribute' => 'lesson_' . $lid,
                'label' => $name['name'], 
                'format' => 'raw',
                'value' => function($model, $key, $index) use($lid, &$data) {
                        return '<input class="txt" data-lid="'.$lid.'" type="text" value="'.$data[$key]['lesson_'.$lid].'"/>';
                }

        ];
}

It gives me error : Undefined index: lesson_49 But I'm sure that $data provider, has the key lesson_49 (proved by var_dump);

what is the problem? :-(

maybe try to use var_dump($data) in your value function when !isset($data[$key]['lesson_'.$lid])? — Patryk Radziszewski
– Patryk Radziszewski, Commented Feb 3, 2016 at 12:30
@PatrykRadziszewski oh I thought it's a great problem !!! it worked thanks. please reply to the question and let me choose it as answer — pouria
– pouria, Commented Feb 3, 2016 at 12:41

score 2 · Accepted Answer · 2016-02-03 12:52:25Z

2

You should check for value is empty or not using isset() or empty():

Use isset() inside value function to check for empty value.

For example,

(isset($data[$key]['lesson_'.$lid]) ? $data[$key]['lesson_'.$lid] : '-';

You can also use var_dump($data).

edited Feb 3, 2016 at 12:52

answered Feb 3, 2016 at 12:47

user3164240

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Comments

Patryk Radziszewski · Accepted Answer · 2016-02-03 13:01:07Z

1

Try to use var_dump($data) in your value function when !isset($data[$key]['lesson_'.$lid]) and check what's wrong with your data

edited Feb 3, 2016 at 13:01

answered Feb 3, 2016 at 12:45

Patryk Radziszewski

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2 Comments

pouria Over a year ago

I should say the better answer is to use (isset($x) ? $x : '-')

Patryk Radziszewski Over a year ago

@pooria sure, I agree that's it's how it should look in the end... But in certain circumstances we'd like to know what exactly is wrong, especially while developing.

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