Create dropdown/select box in magento system.xml for payment/shipping configuration

Question

How to create dropdown/select box in magento system.xml for payment/shipping configuration

• Claudiu Creanga: looks like self promotion and it is anyway a duplicate question
• Phoenix128_RiccardoT: Too generic, please be more specific.
• Jaydip Kansagra: Please check below i also put the answer of my question.

Answer 1

Create drop down in system.xml and show custom values in it, rather than using default magento classes only

Directory : app/code/local/Companyname/Modulename/config/system.xml

In system.xml

<config>
 <sections>
 <payment>
 <groups>
 <Modulename translate="label" module="Modulename">
 <label>Payment Module</label>
 <sort_order>670</sort_order>
 <show_in_default>1</show_in_default>
 <show_in_website>1</show_in_website>
 <show_in_store>0</show_in_store>
 <fields>
 <paymentmethod translate="label comment">
 <label>Payment method</label>
 <comment>Omni Payment method.</comment>
 <frontend_type>select</frontend_type>
 <source_model>Modulename/Modelname</source_model>
 <sort_order>30</sort_order>
 <show_in_default>1</show_in_default>
 <show_in_website>0</show_in_website>
 <show_in_store>0</show_in_store>
 </paymentmethod>
 </fields>
 </Modulename>
 </groups>
 </payment>
 </sections>
</config>

If you want to create your custom source_Model, you need to do the following steps: Create a Pmethod.php in app/code/local/Companyname/Modulename/Model/Pmethod.php Companyname_Modulename is our module name. You need to create a function name toOptionArray() as mention below, the value and label can be anything you want to be display in dropdown

In Pmethod.php

class Companyname_Modulename_Model_Pmethod
{
 public function toOptionArray()
 {
 return array(
 array(
 'value' => 'key1',
 'label' => 'Label 1',
 ),
 array(
 'value' => 'key2',
 'label' => 'label 2',
 )
 );
 }
}

• Kaushal Suthar: How to show selected value in backend dropdown? Because after saving it's not showing selected value in dropdpwn.
• Jaydip Kansagra: You need to check <source_model>Modulename/Modelname</source_model> with same value as Model
• Kaushal Suthar: Yes that's correct in mine, Values are fetched properly but after saving it's not showing selected value in dropdown.