How to get component parameters?

问题

I have a problem here and just cant solve it :-/

I am developing an Joomla component with backend. In the backend I set a parameter, the dashboardId, but I can't access them in the view. I always get data:protected (when I dump params). It seems like I'm not allowed to access the object.

Here is the default.xml:

<?xml version="1.0" encoding="utf-8"?>
<metadata>
    <layout title="Dashboard">
        <message>
            <![CDATA[dashboard LAYOUT DESCRIPTION]]>
        </message>
    </layout>
    <fields name="params">
        <fieldset name="params">
            <field
                name="dashboardId" 
                type="text" 
                label="Dashboard ID"
                description="com_dashboard_desc"
                default="1"
            >   
            </field>
        </fieldset>
    </fields>
</metadata>

Now, in the view.html.php I try to access the parameter like this:

$app = &JFactory::getApplication();
$params = JComponentHelper::getParams('com_dashboard');
$dashboardId = $params->get('dashboardId');
var_dump($dashboardId);

When I do var_dump($dashboardId); I get NULL but when I dump $app, I can see the dashboardID

every help would be appreciated! Thanks

回答1:

There's a more simple way. First import Joomla Component Helper:

jimport('joomla.application.component.helper'); // not required in Joomla 3.x

And then retrieve any attribute you want like this:

$params = JComponentHelper::getParams('com_dashboard');
$dashboardID = $params->get('dashboardID');

Greetings.

回答2:

$app = JFactory::getApplication('site');
$componentParams = $app->getParams('com_example');
$param = $componentParams->get('paramName', defaultValue);

回答3:

Similar to the answer provided by LoboX, I'd recommend using the component helper to get component parameters:

jimport('joomla.application.component.helper'); // Import component helper library
$params = JComponentHelper::getParams(JRequest::getVar('option')); // Get parameter helper (corrected 'JRquest' spelling)
$params->get('parameter_name'); // Get an individual parameter

The JRequest::getVar('option') returns your component's name with the com_ prefix. Aside from that, it looks like you're trying to mix a little bit of 1.5/1.6 syntax into your configuration file. If you haven't seen it yet, try reading through the 2.5 version of the documentation. I hope that helps!

回答4:

It is simular to J.T. Blum answer, but in Joomla 3.x JRequest is depricated. It is another way to get the apllication's params.

    $app = JFactory::getApplication();
    $input = $app ->input;
    $componentName = $input ->get('option');
    $params = JComponentHelper::getParams($componentName);
    print_r($params);

回答5:

I had a similar problem. I only got the data:protected result until I went to the configuration of my component and saved it. Though there were default values printed in the textfields Joomla wasn't able to read them before clicking on 'save'.

回答6:

Helper Function to get Params Object in all Joomla Versions 1.5 / 2.5 /3.x

class myCompoHelper{

    public static function getParams($option)
    {

        if (version_compare(JVERSION, '1.5', 'g'))
        {
            $application = JFactory::getApplication();
            if ($application->isSite())
            {
                $params = $application->getParams($option);
            }
            else
            {
                jimport('joomla.application.component.helper');
                $params = JComponentHelper::getParams($option);
            }
        }
        else
        {
            jimport('joomla.application.component.helper');
            $params = JComponentHelper::getParams($option);
        }
        return $params;
    }

}

$params=myCompoHelper::getParams('com_mycomponent');
echo $params->get('myParamName',null);

回答7:

Since version 3.1 Joomla is in process to deprecate all J classes, matter effect, version 4.0 will deprecate almost all J classes, the recommended way from now on to retrieve components param is either calling the entire namespace function:

Joomla\CMS\Component\ComponentHelper::getParams('com_dashboard')->get('dashboardID');

or, if you are working on a model, you can call use keyword in order to import the file and use the class down in the document, like

use Joomla\CMS\Component\ComponentHelper;

function myFunction() {
    $param = ComponentHelper::getParams('com_dashboard');
    $dashboardID = $param->get('dashboardID');
}

回答8:

I had the same problem and the solution was this:

$input = JFactory::getApplication()->input;
$parametername = $input->getInt('parametername');
echo $parametername;

This is the name of a parameter in the default.xml in the views tmpl folder. here is the xml

<?xml version="1.0" encoding="utf-8"?>
<metadata>
    <layout title="Offers">
         <message>This is a component in order to display offers</message>
    </layout>
    <state>
        <name>name</name>
            <description>description</description>

        <url addpath="/administrator/components/com_component/elements">
            <param name="category_id" section="com_component" type="categoriesmenu"  value_field="category_name" label="COM_COMPONENT_CATEGORY_FIELD_SELECT_TITLE" description="COM_COMPONENT_CATEGORY_FIELD_SELECT_TITLE_DESC" />
        </url>
    </state>

    <fields name="request" >
        <fieldset name="request" addfieldpath="/administrator/components/com_component/models/fields">
            <field name="parametername" type="category"
                label="category"
                required="true"
                description="Perigrafh"
            />
        </fieldset>
    </fields>


</metadata>

来源：https://stackoverflow.com/questions/10431995/how-to-get-component-parameters