The example in this article describes the usage of associated query in Yii2. Share it with everyone for your reference, the details are as follows:
There are two tables, post and category, post.cate_id corresponds to category.id
Use Gii to increase the models of these two tables
Then the post model has the following code
public function getCate() { return $this->hasOne(Category::className(), ['id' => 'cate_id']); }
Add the following method at the bottom of the post model to obtain the content of the association table
public static function getPostsByCategory($cate_id) { return Post::find() ->joinWith('cate') ->where(['post.cate_id'=>$cate_id]) ->asArray() ->all(); }
I hope this article will be helpful to everyone’s PHP program design based on the Yii framework.
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