How to join three tables and get value in grid view - mysql

Question

I have three tables :
contacts hasMany groups
contact_groups hasMany contacts
contact_contact_groups
columns in table contact
contact_id | contact_name
columns in table contact_groups
group_id | group_name
columns in table contact_contact_groups
contact_contact_group_id | contact_id | group_id
MODEL
contacs model
public function getContactContactGroups()
{
return $this->hasMany(ContactContactGroups::className(),
['contact_id' => 'contact_id']);
}
contact_groups model
public function getContactContactGroups()
{
return $this->hasMany(ContactContactGroups::className(),
['group_id' => 'group_id']);
}
contact_contact_groups model
public function getGroup()
{
return $this->hasOne(ContactGroups::className(), ['group_id' => 'group_id']);
}
public function getContact()
{
return $this->hasOne(Contacts::className(), ['contact_id' => 'contact_id']);
}
I want to display grid like this :
-----------------------------
Contact Name | Group Name
-----------------------------
Me | Uncategorized
Mother | Family
Jhon | Business
VIEW
<?= GridView::widget([
'dataProvider' => $dataProvider,
'filterModel' => $searchModel,
'tableOptions' =>['class' => 'table table-striped table-bordered'],
'columns' => [
[
'attribute' => 'contact_name',
'value' => 'contact_name',
],
[
'attribute' => 'contactContactGroups.group_id',
'value' => 'contactContactGroups.group.group_name',
'filter' => Html::activeDropDownList($searchModel, 'group_id', ArrayHelper::map(ContactGroups::find()->where(['group_status'=>'ACTIVE'])->asArray()->all(), 'group_id', 'group_name'),['class'=>'form-control','prompt' => 'Select Group']),
],
],]);
?>
ContactsController
public function actionIndex() {
$this->unsetThisButton(array(4,5));
$searchModel = new ContactsSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
]);
}
But it showing (not set) not a group_name .

Answer 1

A simple way is based on adding a getter in your model eg: for contact_contact_groups model
you have a relation
public function getGroup()
{
return $this->hasOne(ContactGroups::className(), ['group_id' => 'group_id']);
}
use a getter for group_name
public function getGroup_group_name() {
return $this->group->group_name;
}
and in grid view in the attribute
[
'attribute' => 'group_group_name',
'filter' => Html::activeDropDownList($searchModel, 'group_id', ArrayHelper::map(ContactGroups::find()->where(['group_status'=>'ACTIVE'])->asArray()->all(), 'group_id', 'group_name'),['class'=>'form-control','prompt' => 'Select Group']),
],
do the same for the relation and field

Answer 2

I Found simple stuff like this :)
GRID (VIEW)
[
'attribute' => 'contactContactGroups.group_id',
'value'=>function ($data) {
$d = array();
foreach ($data->contactContactGroups as $k=>$m)
{
$d[] = ContactContactGroups::get_group_name_by_id($m->group_id);
}
return implode($d, ', ');
},
'filter' => Html::activeDropDownList($searchModel, 'group_id', ArrayHelper::map(ContactGroups::find()->where(['group_status'=>'ACTIVE'])->asArray()->all(), 'group_id', 'group_name'),['class'=>'form-control','prompt' => 'Select Group']),
],
models/ContactContactGroups.php Model
I create function get_group_name_by_id($id)
public static function get_group_name_by_id($id){
$model = ContactGroups::find()->where(["group_id" => $id])->one();
if(!empty($model)){
return $model->group_name;
}
return null;
}
so the result is :
Contact | Category
-------------------------------
Me | Business, Family
Erick | Business, Office
Jhon | Office
Thank's #scaisEdge, you give me some clue ;)