array_unshift command doesn't work properly in yii2

Question

I have a problem here. I have a drop-down list with a users and when I click on any user, it shows a clients which are assigned to it.

Now I've added Unassigned clients selection into the drop-down top to show which clients are unassigned. I've added it with a array_unshift() command, but now in some existing users (not all of it) it's not showing any clients, but these are assigned in the database.

When I remove array_unshift, the clients shows properly, but then there are no extra selection.

I'm thinking that there are something wrong with the array_unshift(), but not sure..

Here is my select function:

public static function getUsers()
{
    $query = self::find()
        ->select(['id', "CONCAT(name, ' ', surname, ' (', email, ')') as name"]);

    $users = ArrayHelper::map($query->asArray()->all(), 'id', 'name');

    array_unshift($users, 'Test'));

    return $users;
}

Bizley · Accepted Answer · 2017-09-20 11:57:47Z

3

From PHP docs:

All numerical array keys will be modified to start counting from zero while literal keys won't be changed.

Use +:

public static function getUnmappedUsersList()
{
    $query = self::find()
        ->select(['id', "CONCAT(name, ' ', surname, ' (', email, ')') as name"]);

    return [Yii::t('app', 'ADMIN_PANEL_MIGRATE_UNASSIGNED_CLIENTS')] 
        + ArrayHelper::map($query->asArray()->all(), 'id', 'name');
}

answered Sep 20, 2017 at 11:57

Bizley

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2 Comments

HELPME Over a year ago

It works. Thank you. Could you also please explain the sentence you've written about all numerical keys...? I can't get it. I'm trying to var_dump() mine array_unshift and your return, but the result gives me exact same array. So what is different?

Bizley Over a year ago

It can not be the same array. ArrayHelper::map generates something like ['12' => 'aaa', '34' => 'bbb', '36' => 'ccc'] when you use array_unshift it is being remapped to [0 => 'unshifted element', 1 => 'aaa', 2 => 'bbb', 3 => 'ccc'].

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