Question

我创建了一个控制器，用于检索JSON格式的数据，我需要json格式的所有关系数据

我的数据库就像

TABLE_1
_id    category1
 1      fruit
 2      vegetable

TABLE_2
_id    type
 1      winter
 2      summer

TABLE_3
_id     name    cata_table1    cata_table2    
1       apple   1               2

Here cata_table1 is foreign key to TABLE_1 and cata_table2 foreign key to TABLE_2

$sql="SELECT * from  TABLE_3";
$command=$connection->createCommand($sql);
$row=$command->queryAll();

如何查询关系数据以从table1输出cata_table1字段的值，从table2输出cata_table2 所以我的结果查询输出有`_id，name，TABLE_1.category1，TABLE_2.type

model TABLE_3

class TABLE_3 extends CActiveRecord
{
public static function model($className=__CLASS__)
{
    return parent::model($className);
}

public function tableName()
{
    return 'TABLE_3';
}
public function rules()
{
    return array(
        array('_id,name,cata_table1,cata_table2', 'required'),
        array('_id, name, cata_table1, cata_table2', 'safe', 'on'=>'search'),
    );
}
public function relations()
{

}

Answer 1

试试这个

您可能在TABLE_3模型中有关系，如图所示

public function relations()
    {
       'relation1' => array(self::BELONGS_TO, 'TABLE_1', '_id'),
       'relation2' => array(self::BELONGS_TO, 'TABLE_2', '_id'),
      }

按照你上面所做的那样做，然后做这样的事情

$sql="SELECT * from  TABLE_3";
$command=$connection->createCommand($sql);
$row=$command->queryAll();
$sample=array();
foreach($row as $key=>$value){
   $sample=array('id'=>$value->id,'name'=>$value->name,'name1'=>$value->relation1->category1,'name2'=>$value->relation2->type)
}

之后编码为json

echo CJSON::encode($sample);

检查一些语法可能这不是完美答案

Answer 2

创建像Ninad在TABLE_3模型中所说的关系：

public function relations(){
   'relation1' => array(self::BELONGS_TO, 'TABLE_1', '_id'),
   'relation2' => array(self::BELONGS_TO, 'TABLE_2', '_id'),
}

在行动中：

$results = array();
$models = TABLE_3::model()->with(array('table1','table2'))->findAll();
foreach($models as $model){
   $results[] = array($model->name, $model->relation1->category1, $model->relation2->type);
}
echo json_encode($results);

如何在yii中查询关系数据

2 个答案: