1

My business directory application calls for 3 chained select boxes, and I'm using cakephp to build this application.

The hierarchy and order of choices for the sections is this:

1 - business group

2 - business type

3 - city (included in table customer)

The relationships are:

  • customer HABTM business types

  • business groups have many business types

  • business types have one business group, HABTM customers

I have searched for jquery plugins that help with this, and found one by Remy Sharp, but it doesn't have the more complex relationships I have. http://remysharp.com/2007/09/18/auto-populate-multiple-select-boxes/

What I imagine happening is the first selection box (business groups) is pre-populated and once a selection is made, an event listener send a message that filters the second selection box, and the same for the third.

What I don't know is how to structure the search action based on the event listener.

Any advice or am I way off base?

As always, I come to the well for help.

Much appreciated. Paul

Thanks very much Nick, I've read many of your posts I really appreciate your response.

I've followed your instructions but have run into problems. I've tried my best to resolve them but haven't figured it out.

This is what I've done so far:

1) created 'chained' actions in both the business_type and business_directory (renamed customer to business directory, which is more appropriate.)

business type chained action:

function chained($business_group_id) {
    $business_types = $this->BusinessType->find('list', array(
        'conditions' => array( 'BusinessType.business_group_id' => $business_group_id)
        ));

         $this->set('business_types', $business_types);
     }

business directory chained action:

function chained($business_type_id) {
    $business_directories = $this->BusinessDirectory->bindModel(array( 'hasOne' => array('business_directories_business_types' )));         
    $business_directories = $this->BusinessDirectory->find('all', array(
        'fields' => array( ' BusinessDirectory.city'),
        'conditions' => array( 'business_directories_business_types.business_type_id' => $business_type_id)
        ));
            $this->set('business_directories', $business_directories);
     }

I did find that with a HABTM relationship, using find 'list' didn't create the join query, whereas find 'all' did.

2) I then created a search action in the business directory and corresponding view.

For the business groups I created a getList action to populate the option list in the search form:

function getList() {
     return $this->BusinessGroup->find('list');
}

In the search view, I've added the javascript for the chain select:

<script type="text/javascript">
<!--
$(function () {
    var group = $('#businessGoup');
    var type = $('#businessType');
    var city = $('#businessDirectoryCity');

    type.selectChain({
        target: city,
        url:  '../business_directories/chained/'+$(this).val(),
  data: { ajax: true, anotherval: "anotherAction" }
    });

    group.selectChain({
        target: type,
        url: '../business_types/chained/'+$(this).val()   
    }).trigger('change');

});
//-->
</script>

And the form:

create('business_directories', array('action'=>'/search_results')); ?> input('business_group_id', array( 'type' => 'select', 'id' => 'businessGoup', 'empty' => '-- Select Business Group --', 'multiple' => true, 'options' => $this->requestAction('/business_groups/getList' ), 'label' => 'Business Group')); ?> input('business_type.id', array( 'type' => 'select', 'id' => 'businessType', 'empty' => '-- Select Business Type --', 'multiple' => true, 'options' => 'none selected', 'label' => 'Business Type')); ?> input('business_directories.id', array( 'type' => 'select', 'id' => 'businessDirectoryCity', 'empty' => '-- Select City --', 'multiple' => true, 'options' => 'options', 'label' => 'City')); ?> end('Search'); ?>

When I test the business type chain function, /business_types/chained/1, everything works.

But when I test the search view, I get a javascript alert error. Then when I check firebug, I get the following two errors:

Warning (2): Missing argument 1 for BusinessTypesController::chained() [APP\controllers\business_types_controller.php, line 71]

Notice (8): Undefined variable: business_group_id [APP\controllers\business_types_controller.php, line 73]

Any additional help with this is very much appreciated.

Thanks, Paul

4

1 回答 1

2

您需要在控制器（business_type 和 customer）中有 2 个操作。

每个动作都应该是这样的。在这种情况下，对于业务类型

function chained($parent_id){
    $business_types = $this->BusinessType->find('list', array('conditions'=>'BusinessType.business_group_id'=>$parent_id));
    $this->set('business_types', $business_types);
}

当然，您还需要查看该操作，该操作将为链式选择以正确格式格式化值。

对于业务组，您需要直接显示所有值，因此不需要 ajax。

客户控制器的操作类似，但您需要选择所有相关客户的城市。

然后使用链式选择，您需要设置正确的元素并设置需要调用的正确操作。

IE：

$('#id-of-the-business-group').selectChain({
    target: $('#id-of-the-business-type-field'),
    url: '/business_types/chained/'+$(this).val()
});
于 2010-09-14T07:10:00.040 回答