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  • How to display Category Dropdown in admin panel through system.xml in magento?

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    In magento in a module if you're required to create a admin panel tab in which you need to display Category Drop down field through system.xml file in your module, then lets see how we can do it.

     

    1- In the etc folder of the module open the system.xml(i.e., at app/code/local/Your/Module/etc ) file follow the codes as described below.

     

    2- Now in the module in model folder create a folder structure like /System/Config/Source(i.e., at app/code/local/Your/Module/Model/System/Config/Source) in this 'Source' folder create a class category.php that extends the core class Adminhtml_Model_System_Config_Source_Category and in that class follow the codes as described at step 2.

     

    Now, lets check out the codes for the above steps :

     

    1- In your system.xml file add this code:

    
    <?xml version="1.0" encoding="UTF-8"?>
    
    <config>
    
        <tabs>
    
            <Your translate="label" module=module"">
    
                <label>Your Extensions</label>
    
                <sort_order>100</sort_order>
    
            </Your>
    
        </tabs>
    
        <sections>
    
            <Your translate="label" module="module">
    
                <label> Module Options</label>
    
                <tab>Your</tab>
    
                <sort_order>1000</sort_order>
    
                <show_in_default>1</show_in_default>
    
                <show_in_website>1</show_in_website>
    
                <show_in_store>1</show_in_store>
    
    
                <groups>
    
                    <your_group translate="label" module="module">
    
                        <label>General</label>
    
                        <frontend_type>text</frontend_type>
    
                        <sort_order>1000</sort_order>
    
                        <show_in_default>1</show_in_default>
    
                        <show_in_website>1</show_in_website>
    
                        <show_in_store>1</show_in_store>
    
    
                        <fields>
    
    
                            <your_field_name translate="label comment">
    
                                <label>Category: </label>
    
                                <comment>Choose category.</comment>
    
                                <frontend_type>select</frontend_type>
    
                                <source_model>Your_module/system_config_source_category</source_model>
    
                                <sort_order>2</sort_order>
    
                                <show_in_default>1</show_in_default>
    
                                <show_in_website>0</show_in_website>
    
                                <show_in_store>0</show_in_store>
    
                            </your_field_name>
    
    
                        </fields>
    
                    </your_group>
    
                </groups>
    
            </Your>
    
        </sections>
    
    </config>

     

    Suppose, in the section as 'your' you have a group as 'your_group' in which you need to add a field 'Category'. For that purpose in the fields tag create a field as 

    <module_choose_category translate="label comment">
    
    <label>Category: </label>
    
    <comment>Choose category.</comment>
    
    <frontend_type>select</frontend_type>
    
    <source_model>module/system_config_source_category</source_model>
    
    <sort_order>2</sort_order>
    
    <show_in_default>1</show_in_default>
    
    <show_in_website>0</show_in_website>
    
    <show_in_store>0</show_in_store>
    
    </module_choose_category>  

     

     

    In that field we have used two main important tags that are <frontend_type> and <source_model>.

    The tag <frontend_type> defines the input type of the field as i have set it to "select" which is of drop down.

    And the <source_model> tag contains the path of the model class with the path defined as module/system_config_source_category.

     

    2- Now in the module in model in the class Your_Module_Model_System_Config_Source_Category add this function toOptionArray.

     

    <?php
    
    class Your_Module_Model_System_Config_Source_Category extends Mage_Adminhtml_Model_System_Config_Source_Category
    
    {
    
        public function toOptionArray($addEmpty = true)
    
        {
    
            $collection = Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect('*');
    
    
            $options = array();      
    
            foreach($collection as $category){
    
                if($category->getName() != 'Root Catalog'){
    
                    $options[] = array(
    
                       'label' => $category->getName(),
    
                       'value' => $category->getId()
    
                    );
    
                }
    
            }
    
            return $options;
    
        }
    
    }

     

    In above code the class extends Mage_Adminhtml_Model_System_Config_Source_Category and override the function toOptionArray as above to get the categories in the $options array and return it.

     

    In this way the category dropdown field will be created on the admin panel through your system.xml file in the your desired section.

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