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Simple usage example of related query in Yii2

高洛峰
高洛峰Original
2016-12-23 16:40:571393browse

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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