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    Magento Block Series – Day Two

    Updated 5 March 2013

    Magento Blocks – we have explained the basic block assignment and block postion changing in our last article  .  we’ll dive deep this time

    Magento blocks on particular page- 

    This is quite interesting and very important for all magento developers, how some of the block calls on some of the pages only like account page or checkout page .

    to understand this logic we should have strong understanding of magento routing system , how controllers works and how associated block works based on the urls . Everything in magento is a module , so all the modules have theri controllers which are used for url routing system . lets take an example of url e.g

    module routes in this way module_controller_action

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    as you can see here module is customer , controller is accountcontroller and action is indexaction (all magento controller action works in this manner e,g editAction = edit on URL  deleteAction = delete). You can verify by visiting this path  /app/code/core/Mage/Customer/controllers

    also related xml can be found under /app/design/frontend/base/default/layout customer.xml

     Magento Reference Block 

    Now its time to explain reference block as its name suggests reference block is help ful to give a reference to your block . Suppose you want to integrate your block in left postion of the store then you can easily call <reference name=”left”>

    <reference name="left">
    <block type="core/template" after="-" 
    name="sleek" template ="Sleekaccordian/new.phtml" /></reference>

     Reference Action Method 

    Under reference tag we can call functions as well using action method  as per the given example for newsletter.xml

    <reference name="customer_account_navigation">
    <action method="addLink" translate="label" module="newsletter">
    <label>Newsletter Subscriptions</label></action>

    this refrence (customer_account_navigation) is defined under customer.xml

    <block type="customer/account_navigation" name="customer_account_navigation" 
    before="-" template="customer/account/navigation.phtml">
    <action method="addLink" translate="label" module="customer">
    <name>account</name><path>customer/account/</path><label>Account Dashboard</label></action>
    <action method="addLink" translate="label" module="customer">
    <label>Account Information</label></action>
    <action method="addLink" translate="label" module="customer">
    <name>address_book</name><path>customer/address/</path><label>Address Book</label></action>

    now as per the block class if you’ll visit

    /app/code/core/Mage/Customer/Block/Account then you’ll find addLink function under Navigation.php





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