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psql -U postgres dt < /path/to/dump.sql

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GridView::widget([
        'dataProvider' => $dataProvider,
        'filterModel' => $searchModel,
        'columns' => [
            ['class' => 'yii\grid\SerialColumn'],

            [
                'attribute' => 'user_id',
//              'filter' => array("1" => "open", "2" => "in progress", "3" => "closed")
                'filter' => ArrayHelper::map(\app\models\User::find()->asArray()->all(), 'id', 'username')

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HOW TO INSTALL Angular2:

1) Install Node platform
2) Run 'npm install -g angular-cli'
   '-g' stands for 'global'
   'angular-cli' is a Command Line Interface which allows easly interact with angular while developing
3) Create your project by typing 'ng new <Your-project-name>'
4) Navigate to the folder <Your-project-name> and run 'ng serve'
   it will build a project, run server on URL 'http://localhost:4200' and start watching for changes in code, once file is changed project will be rebuilt the project and browser will be automatically refreshed
   

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List of available databases: \l
List of available tables: \dt
Choose table: \c <table_name>
Quit session: \q

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$(document).on("click", "#test-element", function() {
    alert("click bound to document listening for #test-element");
});

$('body').append('<div id="test-element">Click mee</div>');

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Finf what: > ?<\?= ?Yii::t\('app',\ '(.*)'\);? ?\?>
Replace with:  data-lang-key="\1">

Example:

<a href="javascript:void(0)" class="weather" title="Precipitation"><?= Yii::t('app', 'weather');?></a>

will be raplced to 

<a href="javascript:void(0)" class="weather" title="Precipitation" data-lang-key="weather"></a>

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Find: <\?= ?Yii::t\('app',\ '(.*)'\);? ?\?>
Replace with: \1

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// in controller
Yii::$app->view->params['message_to_layout'] = 'This message will be shown in layout';

// in layout (and in any view!)
<?=$this->params['message_to_layout']?>

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.clearfix::before, .clearfix::after {
    content: "";
    display: table;
}

.clearfix::after {
    clear: both;
}

.clearfix {