Optimal sampling from the database - rest

Question

I make a sample around the city, the city has areas, they have complexes, and apartment complexes. In the end, I need to get an apartment for a certain city, indicating the associated filters (district, complex, etc.). At the moment I did this:
public function actionIndex()
{
$cities = Cities::find()->where(['id' => Yii::$app->request->get('city_id')])->with([
'districts' => function ($query){
$query->filterWhere([
'id' => Yii::$app->request->get('district_id'),
]);
},
'districts.complexes' => function ($query) {
$query->filterWhere([
'id' => Yii::$app->request->get('complex_id'),
'type_id' => Yii::$app->request->get('complex_type_id'),
'developer_id' => Yii::$app->request->get('developer_id'),
]);
},
'districts.complexes.apartments' => function ($query) {
$query->filterWhere([
'amount_room' => Yii::$app->request->get('amount_room'),
'yardage' => Yii::$app->request->get('yardage'),
'level' => Yii::$app->request->get('level'),
'price' => Yii::$app->request->get('price'),
]);
},
])->all();
$query = [];
foreach ($cities as $city) {
foreach ($city->districts as $district) {
foreach ($district->complexes as $complex) {
foreach ($complex->apartments as $apartment) {
$query[] = $apartment;
}
}
}
}
return new ArrayDataProvider([
'allModels' => $query,
]);
}
But it looks kind of crooked, maybe I went the wrong way, and can I do it better?
UPD: I did almost like Yasin Patel.
$cities = Cities::find()
//->select('cities.id') // list your attributes comma saperated
->leftJoin('districts','cities.id=districts.city_id') // join districts table
->leftJoin('complex','districts.id=complex.district_id') // join complex table
->leftJoin('apartment','complex.id=apartment.complex_id') // join apartment table
->where(['cities.id' => Yii::$app->request->get('city_id')])
->andWhere(['cities.id' => Yii::$app->request->get('city_id')])
->filterWhere(['districts.id' => Yii::$app->request->get('district_id')])
->filterWhere(['complex.id' => Yii::$app->request->get('complex_id')])
->filterWhere(['complex.type_id' => Yii::$app->request->get('complex_type_id')])
->filterWhere(['complex.developer_id' => Yii::$app->request->get('developer_id')])
->filterWhere(['apartment.amount_room' => Yii::$app->request->get('amount_room')])
->filterWhere(['apartment.yardage' => Yii::$app->request->get('yardage')])
->filterWhere(['apartment.level' => Yii::$app->request->get('level')])
->filterWhere(['apartment.price' => Yii::$app->request->get('price')]);
return new ActiveDataProvider([
'query' => $cities,
]);
Returns:
[
{
"name":"City1",
"region":{
"id":7,
"name":"Region city1."
}
}
]
But how now to choose all the apartments found?

Answer 1

Try this query.
$cities = Cities::find()
->select('city.id') // list your attributes comma saperated
->leftJoin('districts','city.id=districts.city_id') // join districts table
->leftJoin('complexes','districts.id=complexes.districts_id') // join complexes table
->leftJoin('apartments','complexes.id=apartments.complexe_id') // join apartments table
->where(['id' => Yii::$app->request->get('city_id')])
->andWhere(['city.id' => Yii::$app->request->get('district_id')])
->andWhere(['districts.id' => Yii::$app->request->get('district_id')])
->andWhere(['complexes.id' => Yii::$app->request->get('complex_id')])
->andWhere(['complexes.type_id' => Yii::$app->request->get('complex_type_id')])
->andWhere(['complexes.developer_id' => Yii::$app->request->get('developer_id')])
->andWhere(['apartments.amount_room' => Yii::$app->request->get('amount_room')])
->andWhere(['apartments.yardage' => Yii::$app->request->get('yardage')])
->andWhere(['apartments.level' => Yii::$app->request->get('level')])
->andWhere(['apartments.price' => Yii::$app->request->get('price')])
->asArray();
Use your table name and attributes names as needed.
Than use this query in ArrayDataProvider.
return new ArrayDataProvider([
'allModels' => $query,
]);
This will return you records as array.

Answer 2

It turned out to optimize the code in this way::
public function actionIndex()
{
$query = Apartment::find()
->joinWith('complex')
->joinWith('complex.district')
->joinWith('complex.district.city')
->where(['cities.id' => Yii::$app->request->get('city_id')])
->filterWhere(['districts.id' => Yii::$app->request->get('district_id')])
->filterWhere(['complex.id' => Yii::$app->request->get('complex_id')])
->filterWhere(['complex.type_id' => Yii::$app->request->get('complex_type_id')])
->filterWhere(['complex.developer_id' => Yii::$app->request->get('developer_id')])
->filterWhere(['apartment.amount_room' => Yii::$app->request->get('amount_room')])
->filterWhere(['apartment.yardage' => Yii::$app->request->get('yardage')])
->filterWhere(['apartment.level' => Yii::$app->request->get('level')])
->filterWhere(['apartment.price' => Yii::$app->request->get('price')]);
return new ActiveDataProvider([
'query' => $query,
]);
}
Thanks to everyone for their help.