How Can I override Sales_Order_History template in customer section at frontend

Question

I am creating custom module for RMA(product return) in magento that's why I am trying to add a custom link "Return Request" in My Orders panel in customer account section as shown in below image-

For that I have created module "Assel_Rma" which have some files as below-

config.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>
  <modules>
        <Assel_Rma>
            <version>1.0.2</version>
        </Assel_Rma>
   </modules>
   <frontend>
        <routers>
            <rma>
                <use>standard</use>
                <args>
                    <module>Assel_Rma</module>
                    <frontName>rma</frontName>
                </args>
            </rma>
        </routers>
        <layout>
            <updates>
                <rma>
                    <file>assel/rma.xml</file>
                </rma>
            </updates>
     </layout>
    </frontend>
    <global>
        <models>
            <rma>
                <class>Assel_Rma_Model</class>
            </rma>
        </models>
        <blocks>
            <rma>
                <class>Assel_Rma_Block</class>
            </rma> 
            <sales>
                <rewrite>
                    <sales_order_history>Assel_Rma_Block_Sales_Order_History</sales_order_history>
                </rewrite>
           </sales>               
        </blocks>
        <helpers>
            <rma>
                <class>Assel_Rma_Helper</class>
            </rma>
        </helpers>
    </global>
</config>

frontend/base/default/layout/assel.xml

<?xml version="1.0"?>
<layout version="0.1.0">

    <sales_order_history translate="label">
        <label>Customer My Account Order History</label>
        <update handle="customer_account"/>
        <reference name="my.account.wrapper">
            <action method="setTemplate">
                <template>rma/sales/order/history.phtml</template>
            </action>
          <block type="customer/account_dashboard" name="customer.account.link.back" template="customer/account/link/back.phtml"/> 
        </reference>
        <reference name="left">
            <remove name="catalog.shopby"/>
            <remove name="basenews"/>
            <remove name="bestsales"/>
            <remove name="left-block-banner-free"/>
            <remove name="blogleft" /> 
        </reference>
    </sales_order_history>

</layout>

app/code/local/Assel/Rma/Block/Sales/Order/History.php

<?php
class Assel_Rma_Block_Sales_Order_History extends Mage_Sales_Block_Order_History
{
}

After doing all above now "My Orders" looks like as below-

In above image my sidebar gets doubled and nothing is shown on the page. can anyone please help me to get rid out of this problem.

Answer 1

change rewrite code in xml

<sales>
                <rewrite>
                    <order_history>Assel_Rma_Block_Sales_Order_History</order_history>
                </rewrite>
           </sales>

you have to set template from block as it is set in Mage_sales_Block_Order_History.

public function __construct()
    {
        parent::__construct();
        $this->setTemplate('rma/sales/order/history.phtml');

        $orders = Mage::getResourceModel('sales/order_collection')
            ->addFieldToSelect('*')
            ->addFieldToFilter('customer_id', Mage::getSingleton('customer/session')->getCustomer()->getId())
            ->addFieldToFilter('state', array('in' => Mage::getSingleton('sales/order_config')->getVisibleOnFrontStates()))
            ->setOrder('created_at', 'desc')
        ;

        $this->setOrders($orders);

        Mage::app()->getFrontController()->getAction()->getLayout()->getBlock('root')->setHeaderTitle(Mage::helper('sales')->__('My Orders'));
    }