Question

我正在尝试使用Ajax根据所选状态（也是一个选择框）填充城市选择框。当我选择州时，城市选择框没有被填充。

以下有5种型号：学生，MerryParent，MerryClass，State，City。所有这些都是彼此相关的。

有人可以告诉我我做错了什么吗？谢谢。

以下是型号： student.php

 <?php
 class Student extends appModel{
var $name='Student';
var $belongsTo=array('MerryParent','State','City','MerryClass');

          }
      ?>

merry_parent.php

     <?php
     class MerryParent extends appModel{
var $name='MerryParent';
$hasMany=array(
        'Student'=>array(
        'className'=>'Student',
        'foreignKey'=>'merry_parent_id'
                )
            );
$belongsTo=array('State','City','MerryClass');

                     ?>

merry_class.php

         <?php
            class MerryClass extends AppModel{
         var $name='MerryClass';
         var $hasMany=array
    ('Student'=>array(
            'className'=>'Student',
            'foreignKey'=>'class_id'
            ),
     'MerryParent'
    );
        var $belongsTo=array('State','City');
        //var $displayField='class_name';
           }
          ?>

city.php

      <?php
        class City extends AppModel{
    var $name='City';
    var $belongsTo='State';
    var $hasMany=array('MerryParent','MerryClass',
            'Student'=>array(
                'className'=>'Student',
                'foreignKey'=>'city_id'
                )
            );
                 }
        ?>

state.php

               <?php
                      class State extends AppModel{
                         var $name='State';
                         var $hasMany=array(
            'MerryParent',
            'MerryClass',
            'City'=>array(
            'className'=>'City',
            'foreignKey'=>'state_id'
            //'dependent'=>true
            ),
            'Student'=>array(
            'className'=>'Student',
            'foreignKey'=>'state_id'
            )
        );

              }
             ?>

控制器 students_controller.php

<?php
class StudentsController extends AppController{
 var $name='Students';
 var $helpers = array('Html','Form','Ajax','Javascript');
 var $components=array('RequestHandler');

function getcities(){

    $options=$this->Student->City->find('list',
                                    array
                                    ('conditions'=>array(
                                                    'City.state_id'=>$this->data['Student']['state_id']
                                                    ),
                                     'group'=>array('City.name')
                                    )
                                );//closing parentheses for find('list'...


    $this->render('/students/ajax_dropdown');
}


function add(){


    if (!empty($this->data)){
        /*var_dump($this->data);
        die(debug($this->Student->validationErrors)); */
        $student=$this->Student->saveAll($this->data,array('validate'=>'first'));
        if (!empty($student))
           {
            $this->Session->setFlash('Your child\'s admission has been received. We will send you an email shortly.');
                    $this->redirect(array('controller'=>'pages', 'action'=>'home'));

            }


    } //for if (!empty....

     $states=$this->Student->State->find('list');

    $cities=array();
      $this->set(compact('states','cities'));

}//end function

} ？＆GT;

merry_parents_controller.php

<?php
 class MerryParentsController extends AppController{

var $name='MerryParents';


 }
 ?>

add.ctp

  <?php
 echo $javascript->link('prototype',false); 

echo $form->create('Student');
echo '<fieldset>';
echo '<legend>Student Information</legend>';
echo $form->input('Student.name');

$options = array('Male'=>'Male','Female'=>'Female');
$attributes = array('value'=>'Male');
echo $form->radio('Student.gender',$options,$attributes);

echo $form->input('Student.dob', array('label'=>'Date of Birth',
                'dateFormat'=>'DMY', 
                'empty'=>true,
                'timeFormat' => '', 
            'minYear' => ( 
                    date('Y') - 5 
            ), 
            'maxYear' => ( 
                    date('Y') - 2 
            ) 
            ));
echo $form->input('Student.class_id', 
        array(
        'label'=>'Enquiry Class for',
        'empty'=>'Choose one',
'options'=>array('1'=>'Playgroup','2'=>'Nursery','3'=>'LKG', '4'=>'UKG')
        )
        );

echo '</fieldset>';

echo '<fieldset>';
echo '<legend>Parent Information</legend>';
//echo $form->input('Student.parent_id', array('type'=>'hidden'));
echo $form->input('MerryParent.initial', 
array('empty'=>true,
'options'=>array('Dr'=>'Dr', 
                'Mr'=>'Mr', 
                'Mrs'=>'Mrs', 
                'Ms'=>'Ms')
)
);
echo $form->input('MerryParent.name', array('label'=>'Parent/Guardian Name'));
echo $form->input('MerryParent.email');
echo $form->input('MerryParent.landline');
echo $form->input('MerryParent.mobile');
echo $form->input('MerryParent.address');
      echo $form->input('Student.state_id');
 echo $form->input('Student.city_id');
      echo $form->input('MerryParent.postal_code');

      $options = array('url' => 'getcities', 'update' => 'StudentCityId');
  echo $ajax->observeField('StudentStateId', $options); //observes the drop down 
    changes in state id and makes an xmlHttpRequest when its contents have changed.


    echo '</fieldset>';

echo $form->end('Submit');
    ?>

ajax_dropdown.ctp

     <?php foreach($options AS $k=>$v) : ?>
      <option value="<?php echo $k; ?>"><?php echo $v; ?></option>
     <?php endforeach; ?>

Answer 1

您不需要在模型名称和字段中输入0，因为您只在表单中保存一个学生。尝试使用Student.name而不是Student.0.name等所有字段。还尝试使用$ validate =＆gt;进行测试如果它保存则为false。

cakephp Ajax：选择状态时，城市选择框不会填充

1 个答案: