带CI的动态列表

Question

i'm trying to create a multilevel list using codeigniter. the list would look like:

State1

city1
city2

state2

 city3

etc.

but when i run the code i get the error

            Severity: Notice

            Message: Undefined property: stdClass::$city

           Filename: views/testview.php

         Line Number: 32

at line 32 i have:

         <?php  foreach($state->city as $city):?>

my controller:

        //....

   $data['states'] = $this->state_model->get_cities();
   $this->load->view('testview', $data);

my model:

   function get_cities(){

  $states = $this->db->get('state');

  foreach ($states->result() as $state){
$cities = $this->db->get_where('city', array('state_id'=>$state->id));
$state->cities = $cities->result();
}

 return $states;

}

View:

   <?php foreach($states as $state):?>
 <h4><?php echo $state->statename;?></h4>
 <?php  foreach($state->city as $city):?>
<?php echo $city->cityname; ?>
 <?php endforeach;?>
<?php endforeach;?>

Answer 1

Change line 32 to

<?php foreach($state->cities as $city): ?>

You are looking for the cities property. In your model, the city results are assigned to

$state->cities in the $states array.