I try to create a polymorphic association, what is common in Rails but unfortunately not in Yii2. As part of the implementation I need to define the relation:
public function getImages()
{
return $this->hasMany(RecipeImage::className(),
['imageable_id' => 'id', 'imageable_type' => 'Person']);
}
But this doesn't work, because 'Person' is treated as an attribute of the current model, but it is a constant (class name for the polymorphic association).
If I try to use 'andWhere' it adds the condition of course in a WHERE clause instead of the ON clause, causing that only records with existing image returned.
public function getImages()
{
return $this->hasMany(RecipeImage::className(), ['imageable_id' => 'id'])->
andWhere(['imageable_type' => 'Ingredient']);
}
How can I define the relation? There is no andOn method.
In this case you can modify ON condition with andOnCondition method:
public function getImages()
{
return $this->hasMany(RecipeImage::className(), ['imageable_id' => 'id'])
->andOnCondition(['imageable_type' => 'Person']);
}
Official docs:
andOnCondition:
Related
I have created method in the Yii2 model Users to get all the replies for the current user
public function getAllRepliesForUsers() { return $this->hasMany(Replies::class, ['user_id' => 'id'])->viaTable('replies_links', ['replies_id' => 'id'])->where(['entity'=>'user']); }
My replies table
My users table
and the final table that links these two tables
Is my method is correct?
Here's the relationship of Users to the Replies. You can use the Model generator of Gii module so you won't get confused by manually typing them.
public function getReplies()
{
return $this->hasMany(Replies::className(), ['id' => 'reply_id'])->viaTable('rply_links', ['user_id' => 'id']);
}
(May I know what do you intend to do with the condition ->where(['entity'=>'user'])?).
I need to check if a model has been updated and what attributes have changed when saving.
I'm using dirtyAttributes and filter intval as the docs suggests.
The values are coming from an API and are type-cast as they come in, so in theory the filter is redundant.
Model rules
public function rules()
{
return [
[['contract_date', 'order_date'], 'integer'],
[['contract_date', 'order_date'], 'filter', 'filter' => 'intval'],
];
}
This is some of the code currently running:
// Add the changed status variables to the job log
$dirty_attributes = array_keys($model->dirtyAttributes);
if($model->save()) foreach ($dirty_attributes as $attribute)
{
$data[$attribute] = $model->getOldAttribute($attribute).' ('.gettype($model->getOldAttribute($attribute)).')'. ' => '. $model->$attribute.' ('.gettype($model->$attribute).')';
}
var_dump($data);
This produces:
["contract_date"]=>
string(44) "1559669638 (integer) => 1559669638 (integer)"
["order_date"]=>
string(44) "1559669638 (integer) => 1559669638 (integer)"
There is probably something obvious I'm missing, but I can understand what.
After saving model all "oldAttributes" are updated to store new values so comparing them like you do makes no sense. If you want to check which attributes have been changed after saving you can override afterSave() method in your model like:
public function afterSave($insert, $changedAttributes)
{
// $changedAttributes -> this is it
parent::afterSave(); // call parent to trigger event
}
or listen for ActiveRecord::EVENT_AFTER_INSERT / ActiveRecord::EVENT_AFTER_UPDATE event where this data is also passed.
I want to receive data like this:
categories
----category1
----category2
topProducts
----product1
--------photo1
--------photo2
----product2
--------photo1
--------photo2
I need get all categories and top x products.
Each product has two photos.
How can i do this by using yii2 restful?
Thanks.
the query shold look something like this
Category::find()
->with(['subcategories','topProducts', 'topProducts.images'])
->all();
you can use joinWith if you absolutely want a single query
if you retrieve your data with an ActiveController, you need to specify extraFields to the Category model. (here's a rest-specific usage example - rest of the guide should prove usefull as well)
Category model:
public function extraFields() {
return ['subcategories', 'topProducts'];
}
// product relation
public function getTopProducts(){
return $this->hasMany(Product::className(), ['category_id' => 'id'])
// ->order()->where() // your criterias
->limit(10);
}
// subcategories
public function getChildren(){
return $this->hasMany(Category::className(), ['id' => 'parent_id']);
}
Product model:
public function extraFields() {
return ['iamges'];
}
public function getImages(){
return $this->hasMany(Image::className(), ['product_id' => 'id'])
}
ps. since you haven't posed any code or table structure, all relations in my example are based on standard naiming convention
I want to get the result set with extra field through afterFind. In cakePHP no afterFind function. So used protected function _getAttrName() {
return $this->_properties['name'];
}
inside the Entity class. But i did not get the output with 'attr_name' property. with find()
$this->loadModel('Products');
$this->loadModel('Attributes');
// Get the attributes to use as facets
$attributes = $this->Products->Attributes->find(['all',
'order' => 'Attributes.id',
])
->contain(['AttributeTypes'])
->where([
'Attributes.filterable' => true,
//'Attribute.required' => true,
])
->hydrate(false)
->toArray();
Can i get the solution?
You need to declare in your entity class what are the virtual properties you want to expose when converting to array or to json. This is the relevant section of the docs:
http://book.cakephp.org/3.0/en/orm/entities.html#exposing-virtual-properties
namespace App\Model\Entity;
use Cake\ORM\Entity;
class Product extends Entity
{
protected $_virtual = ['attr_name'];
protected function _getAttrName() {
return $this->_properties['name'];
}
...
}
How can I add where condition to my Articles model so that slug(From category model) is equal to $slug?
And this is a function that Gii generated:
public function getCategory()
{
return $this->hasOne(Categories::className(), ['id' => 'category_id']);
}
Here's my code:
public function specificItems($slug)
{
$query = Articles::find()->with('category');
$countQuery = clone $query;
$pages = new Pagination(['totalCount' => $countQuery->count(),'pageSize' => 12]);
$articles = $query->offset($pages->offset)
->limit($pages->limit)
->all();
return ['articles' => $articles,'pages' => $pages];
}
Your SQL query should contain columns from both article and category table. For that you need to use joinWith().
$result = Articles::find()
->joinWith('category')
->andWhere(['category.slug' => $slug])
->all();
Where 'category' is then name of your category table.
However, in your code you deviate from certain best practices. I would recommend the following:
Have both table name and model class in singular (Article and article). A relation can be in plural, like getCategories if an article has multiple categories.
Avoid functions that return result sets. Better return ActiveQuery class. If you have a query object, all you need to get the actual models is ->all(). However, you can further manipulate this object, add more conditions, change result format (->asArray()) and other useful stuff. Returning array of results does not allow that.
Consider extending ActiveQuery class into ArticleQuery and implementing conditions there. You'll then be able to do things like Article::find()->joinWith('category')->byCategorySlug('foo')->all().