Yii 2 Active Record nested many to many relations - php

Question

I have 4 table products, properties, property_items, property_product with relations like this
Product has many properties.
Property has many property_items.
Product has many property_items.
Property_product is intermediary table.
-- products --
Id name
1 Arrabiata
2 Bolognese
--properties --
Id name
1 Pasta type
2 Size
-- property_items --
Id name value property_id
1 Spinach spaghetti ..... 1
2 Linguine ..... 1
3 Spaghetti ..... 1
4 Small .... 2
5 Medium .... 2
6 Large ... 2
-- property_product --
product_id property_id property_item_id
1 1 1
1 1 2
1 2 4
1 2 6
2 1 2
2 1 3
2 2 5
I try use Gii to create those models with relations .
class Products extends \yii\db\ActiveRecord
{
//code
....
public function getProperties()
{
return $this->hasMany(Properties::className(), ['id' => 'property_id'])
->viaTable('property_product', ['product_id' => 'id']);
}
}
class Properties extends \yii\db\ActiveRecord
{
//code
...
public function getPropertyItems()
{
return $this->hasMany(PropertyItems::className(), ['property_id' => 'id']);
}
}
I want to query data with multi nested relation.
How can i create json response with below format in one active record query ?
[
{
"id": "1",
"name": "Arrabiata",
"properties": [
{
"id": "1",
"name": "Pasta type",
"property_items" : [
{
"id": "1",
"name": "Spinach spaghetti",
},
{
"id": "2",
"name": "Linguine",
},
]
},
{
"id": "2",
"name": "Size",
"property_items" : [
{
"id": "4",
"name": "Small",
},
{
"id": "6",
"name": "Large",
},
]
},
],
},
{
"id": "2",
"name": "Bolognese",
"properties": [
{
"id": "1",
"name": "Pasta type",
"property_items" : [
{
"id": "2",
"name": "Linguine",
},
{
"id": "3",
"name": "Spaghetti",
},
]
},
{
"id": "2",
"name": "Size",
"property_items" : [
{
"id": "5",
"name": "Medium",
},
]
},
]
}]
I use this query but it took too much perfomance
Menus::find()->with(['products' => function ($query) {
$query->with(['properties']);
}])
->where(['>', 'status', 0])
->andWhere(['resid' => $id])->asArray()->all();;
foreach ($menus as &$menu) {
foreach ($menu['products'] as &$product) {
foreach ($product['properties'] as &$property) {
$propertyItems = PropertyItems::find()->where(['property_id' => $property['id']]
)
->leftJoin('property_product', 'property_items.id = property_product.property_item_id')
->where(['property_product.product_id' => $product['id'],
'property_product.property_id' => $property['id']])
->asArray()->all();
$property['propertyItems'] = $propertyItems;
}
}
}
If I use this query
Menus::find()->with(['products' => function ($query) {
$query->with(['properties' => function ($query) {
$query->with(['propertyItems']);
}
]);
}
])->asArray()->all();
But the result not same as i expected because all property_items will show up in properties instead of depend on relating with products via table "property_product"
[
{
"id": "1",
"name": "Arrabiata",
"properties": [
{
"id": "1",
"name": "Pasta type",
"property_items" : [
{
"id": "1",
"name": "Spinach spaghetti",
},
{
"id": "2",
"name": "Linguine",
},
{
"id": "3",
"name": "Spaghetti",
},
]
},
{
"id": "2",
"name": "Size",
"property_items" : [
{
"id": "4",
"name": "Small",
},
{
"id": "6",
"name": "Large",
},
{
"id": "5",
"name": "Medium",
},
]
},
],
},
{
"id": "2",
"name": "Bolognese",
"properties": [
{
"id": "1",
"name": "Pasta type",
"property_items" : [
{
"id": "1",
"name": "Spinach spaghetti",
},
{
"id": "2",
"name": "Linguine",
},
{
"id": "3",
"name": "Spaghetti",
},
]
},
{
"id": "2",
"name": "Size",
"property_items" : [
{
"id": "4",
"name": "Small",
},
{
"id": "6",
"name": "Large",
},
{
"id": "5",
"name": "Medium",
},
]
}
]
}]
Thanks in advance.

Answer 1

You have to override the function fields() of the Products and Properties models.
for example:
class Products extends ActiveRecord {
function fields(){
return ['properties'];
}
}
class Properties extends ActiveRecord {
function fields(){
return ['property_items'];
}
}