Question

我有一个数据库，用于存储拍摄内容及其标签。它们与多对多关系有关，我使用联结表来存储关系。知道我想实现一个搜索，其中可以指定N个标签，并且只应返回具有这些N个标签的拍摄。我已经实现了搜索一个标签，但我不知道如何搜索N标签。如果可能的话，我想尽可能做到最好。

这是我在模型中使用的关系：

/**
 * @return \yii\db\ActiveQuery
 */
public function getShootTags()
{
    return $this->hasMany(ShootTag::className(), ['shoot_id' => 'shoot_id']);
}

public function getTags()
{
    return $this->hasMany(Tags::className(), ['tag_id' => 'tag_id'])->via('shootTags');
}

我的搜索模型如下所示：

namespace app\models;

use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use app\models\Shoots;

/**
* ShootsSearch represents the model behind the search form of 
`app\models\Shoots`.
*/
class ShootsSearch extends Shoots
{
 public $tag;
/**
 * @inheritdoc
 */
public function rules()
{
    return [
        [['shoot_id', 'date'], 'integer'],
        [['filename', 'tag'], 'safe'],
    ];
}

/**
 * @inheritdoc
 */
public function scenarios()
{
    // bypass scenarios() implementation in the parent class
    return Model::scenarios();
}

/**
 * Creates data provider instance with search query applied
 *
 * @param array $params
 *
 * @return ActiveDataProvider
 */
public function search($params)
{
    $query = Shoots::find();

    // add conditions that should always apply here

    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);

    $this->load($params);

    if (!$this->validate()) {
        // uncomment the following line if you do not want to return any records when validation fails
        // $query->where('0=1');
        return $dataProvider;
    }

    // grid filtering conditions
    $query->andFilterWhere([
        'shoot_id' => $this->shoot_id,
        'date' => $this->date,
    ]);
    $query->andFilterWhere(['like', 'name', $this->tag]);
    $query->andFilterWhere(['like', 'filename', $this->filename]);

    return $dataProvider;
}
}

Answer 1

会是这样的吗？

Shoot::find()->joinWith('tags')->where(['tag.name' => ['tag1', 'tag2', 'tag3']]);

这将使用您已设置的规则连接数据透视表和标记表，并使用IN语句按标记名称进行过滤

多对多查找具有多个条件的模型

1 个答案: