Yii 2.0实现联表查询加搜索分页的方法示例
author:一佰互联 2019-04-26   click:234

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 yiidbActiveRecord {  #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" => "yiigridSerialColumn",    "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" => "yiigridActionColumn",    "header" => "操作",   ],  ], ]); ?> 

以上步骤完成结果如图:

总结

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