Yii 2.0实现联表查询加搜索分页的方法示例
前言
最近在学习yii2.0,在使用yii2.0过程中遇到一些问题,现将查询搜索分页的方法整理如下,分享出来供大家参考学习,话不多说,来一起看看详细的介绍:
主表:{{%article}}
关联表:{{%article_class}}
方法如下
1、使用gii创建CRUD和search不详述
2、在Article中添加的关联内容,代码#注释部分
class Article extends \yii\db\ActiveRecord { #关联查询1:这里加上被关联字段 public $class_name; ... public function rules() { return [ [['article_title','article_content'], 'required'], [['article_content','article_title','article_class'], 'string'], [['article_addtime', 'article_updatetime'], 'integer'], [['article_title', 'article_author'], 'string', 'max' => 50], #关联查询2:这里加上safe验证,表示该表单字段无验证规则 ['class_name','safe'], ]; } ... #关联查询3:获取被关联表 mysite_article_class public function getArticleClass(){ /** * 第一个参数为要关联的子表模型类名称, * 第二个参数指定通过子表的 id 去关联主表的 article_class 字段 */ return $this->hasMany(ArticleClass::className(), ['id' => 'article_class']); } ... }
3、在ArticleSearch中添加的查询和关联内容,代码#注释部分
class ArticleSearch extends Article { #关联查询1:这里加上被关联字段 public $class_name; ... public function rules() { return [ [['id', 'article_addtime', 'article_updatetime'], 'integer'], [['article_title', 'article_content', 'article_class', 'article_author'], 'safe'], #关联查询2:这里加上safe验证,表示该表单字段无验证规则 ['class_name','safe'], ]; } ... public function search($params) { $query = Article::find(); // add conditions that should always apply here #关联查询4:使用jionWith和select做关联查询 $query = Article::find(); $query->joinWith(['articleClass']); $query->select("{{%article}}.*,{{%article_class}}.class_name"); $dataProvider = new ActiveDataProvider([ 'query' => $query, ]); $this->load($params); if (!$this->validate()) { return $dataProvider; } // grid filtering conditions #精确查询 $query->andFilterWhere([ 'id' => $this->id, 'article_addtime' => $this->article_addtime, 'article_updatetime' => $this->article_updatetime, #关联查询5:添加被关联字段的精确查询,这里要跟view表单被查询属性一致, // '{{%article_class}}.class_name' => $this->class_name, ]); #模糊查询 $query->andFilterWhere(['like', 'article_title', $this->article_title]) ->andFilterWhere(['like', 'article_content', $this->article_content]) ->andFilterWhere(['like', 'article_class', $this->article_class]) ->andFilterWhere(['like', 'article_author', $this->article_author]) #关联查询5:添加被关联字段的精确查询,这里要跟view表单被查询属性一致, ->andFilterWhere(['like', '{{%article_class}}.class_name', $this->class_name]); return $dataProvider; } ... }
4、在ArticleController中添加的分页内容,代码#注释部分
public function actionIndex() { $article = new Article(); #查询 $searchModel = new ArticleSearch(); $dataProvider = $searchModel->search(Yii::$app->request->queryParams); #分页 $dataProvider->pagination = ['pagesize' => '3']; return $this->render('index', [ 'dataProvider' => $dataProvider, 'model' => $article, 'searchModel' => $searchModel, ]); }
5、在index view中添加的表单内容,代码#注释部分
<?= GridView::widget([ 'dataProvider' => $dataProvider, #查询表单 'filterModel' => $searchModel, 'columns' => [ [ 'class' => 'yii\grid\SerialColumn', 'header' => '编号', ], // 'article_class', #注意这里被关联表字段是{{%article_class}}.class_name,表单属性这么写'attribute' => 'class_name', #查询结果就是被关联表字段值'value' => 'class_name', [ 'label'=>'文章分类', 'attribute' => 'class_name', 'value' => 'class_name', ], 'article_title', 'article_addtime:datetime', // 'article_updatetime:datetime', // 'article_author', [ 'class' => 'yii\grid\ActionColumn', 'header' => '操作', ], ], ]); ?>
以上步骤完成结果如图:
总结
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