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Magento > Study Guide Site > Flashcards

Study Guide Site Flashcards

1
Q

What is the DDL class in Magento?

A

The only DDL class in Magento is Varien_Db_Ddl_Table

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2
Q

Which block is responsible for rendering javascript in Magento?

A 
Mage_Page_Block_Html_Head
addJs(),
addJsIe(),
addItem(),
getCssJsHtml()
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3
Q

Which product types exist in Magento?

A 
Magento has 6 standard product types,
Configurable
Simple
Grouped
Bundle
Virtual
Downloadable
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4
Q

Which product types are implemented as part of the Mage_Catalog module, and which are not?

A

Mage_Catalog - simple, grouped, configurable, virtual
Mage_Bundle - bundle
Mage_Downloadable - downloadable

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5
Q

Which classes and files should be checked if a link to a custom javascript file isn’t being rendered on a page?

A 
Mage_Page_Block_Html_Head
addJs(),
addJsIe(),
addItem(),
getCssJsHtml()
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6
Q

Which product types implement a parent-child relationship between product entities?

A

configurable, bundle and grouped

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7
Q

Which database tables are shared between product types, and which ones are specific to one product type?

A

Specific to one product type:
configurable - catalog_product_super_link:table
For configurable, grouped and bundle - catalog_product_relation table

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8
Q

What steps need to be taken in order to implement a custom product type?

A

Add product types config entry

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9
Q

How do the different product types handle price calculation?

A

catalog/product_type_configurable_price

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10
Q

Which indexing processes does the product type influence?

A

Product Price

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11
Q

Which product types implement a parent-child relationship between product entities?

A

configurable product type - configurable(parent) - simple(child)
may be grouped and bundle as well
prepareForCartAdvanced() - initialize product for add to cart process..
calls to prepareProduct() - process product and prepare options
calls to prepareOptions() - Process custom defined options

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12
Q

What are total models responsible for in Magento?

A 
quote, invoice, creditmemo
discount
- grand total
- shipping
- subtotal
- tax
- nominal
- custbalance
- freeshipping
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13
Q

How and when is the include path set up and the auto loader registered?

A

in Mage.php (Varien_Autoload::register();)

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14
Q

How and when does Magento load the base configuration, the module configuration, and the database configuration?

A

Using class Mage_Core_Model_Config:
Magento calls loadBase() to load config file
Next, calls Method: loadModules() to load modules,
then calls loadDb(() to load the database configuration

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15
Q

How does Magento process requests that cannot be mapped?

A

It will send user to a 4 O 4 page using cms/index/noRoute

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16
Q

After a matching action controller is found, what steps occur before the action method is executed?

A 
The controller class is instantiated
Then sets module name,
controller name,
action name,
controller module name & parameters.
Then calls:
setDispatched(true);
Then dispatch($action) to dispatch the request
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17
Q

What is the difference regarding module loading between Mage::run() and Mage::app()?

A 
Mage::app() :: initializes the application object with all variables and objects which are required to access magento 
Mage::run() :: is the Frontend entry point which means it loads the configuration files, module configuration, load Database and handles request processing.
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18
Q

What is the difference regarding module loading between Mage::run() and Mage::app()?

A

Mage::app() - Initialize application without request processing.
Mage::run() - Run application. Run process responsible for request processing and sending response.

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19
Q

Which classes are responsible for the layout being loaded?

A 
Class Mage_Core_Controller_Varien_Action:
Method loadLayout() - processes the request to load layout
Class Mage_Core_Model_Layout
Method \_\_construct() - loads layout xml
Class Mage_Core_Model_Layout_Update
Method load() - load layout updates by handles
20
Q

Which ways exist to specify the layout update handles that will be processed during a request?

A

jquery/jquery-1.8.1.min.js

<!- or

jquery/jquery-1.8.1.min.js

->

21
Q

Which class is responsible for sending output?

A

The Mage_Core_Controller_Response_Http class

Magento uses a response object to send all output.

All output is added to this object, and then its sendResponse method is called.

22
Q

What is the responsibility of Front Controller?

A

Directly receive the request from browser.
All requests call the function Mage_Core_Controller_Varien_Front::dispatch()
- URL rewriting process.
- Load the module and action controller corresponding with the requests through routers to process the requirements which are sent from clients.

23
Q

How to pass variables from layout to block?

A

category_id3
In the block, this can be retrieved by..
$categoryId = $this->getCategoryId();
$categoryId = $this->getData(‘category_id’);

24
Q

Add and customize Javascript

A

in js folder,

in skin js folder,
skin_jsjs/test.js

25
Q

Which events are associated with sending output?

A

http_response_send_before
controller_front_send_response_before
controller_front_send_response_after

26
Q

How and when are the two main types of setup script executed?

A

In Mage_Core_Model_App::_initModules(), calls Mage_Core_Model_Resource_Setup::applyAllUpdates(), and it then calls applyUpdates() to check version number from config.xml.. The config.xml version number is checked against core_resource table’s version of the module.

27
Q

Which is the base setup class for flat table entities, and which one the base for EAV entities?

A

Flat table: Mage_Core_Model_Resource_Setup

EAV table: Mage_Eav_Model_Entity_Setup

28
Q

When does Magento decide which store view to use, and when is the current locale set?

A

Class . Mage_Core_Model_App::
Method: run() which includes
_initCurrentStore() :: Loads all websites, group and stores into website, group and store object using _initStores()
this function checks whether the site is website or store group or store,
currentStore = $store;
Current locale set in Mage_Core_Model_App
init() is called
init() calls $this->_initEnvironment(); which has a setting of locale

29
Q

When are the request and response objects initialized?

A 
Class Mage_Core_Model_App
Method getRequest() 
Method getResponse()
30
Q

Which ways exist in Magento to add router classes?

A

1) Add router section to the config file. The declare a module router and use your router instead of standard
2) Use an event observer to add a router

31
Q

Which routers exist in a native Magento implementation?

A

Admin, Standard, CMS and Default

32
Q

How does the framework discover active modules and their configuration?

A

Class Mage_Core_Model_Config

Method: _loadDeclaredModules()

33
Q

Explain how Magento loads and manipulates configuration information?

A

$this->loadBase(); //config.xml and local.xml
$this->loadModules(); //load all modules xml from app/etc/modules/ directory
$this->_loadDeclaredModules(); //load each modules xml file
$this->loadDb(); //load configuration from db

load data from core_config_data into our configuration:

  1. We add data about websites (see core_website table)
  2. We add data about stores for the existing websites (see core_store table)
  3. We add data from core_config_data according to the scope
    a. Create block first
    b. Then create block
    c. And, finally -
    d. Each iteration replaces data from more general area of the scope with more specific one
34
Q

What are the common methods with which the framework accesses its configuration values and areas?

A

getStoreConfig()
getStoreConfigFlag(),
getStore()-> getConfig();
getConfig()-> getNode();

35
Q

Which class runs total models processing?

A 
Class Mage_SalesRule_Model_Validator
Method process() 
applies and processes rules for each item of total models.
Basically, rules are sorted by the priority and Magento applies rule by rule for each item
36
Q

What configuration parameters are available for event observers?

A 
type (model, object, none, singleton),
class (class name of observer), 
method (method to invoke)
37
Q

What is the structure of event observers, and how are properties accessed therein?

A
  • for checkout/cart after adding product,
    Mage::dispatchEvent(‘checkout_cart_product_add_after’, array(‘quote_item’=>$result, ‘product’=>$product));
    to call,
    $observer->getEvent()->getQuoteItem() and $observer->getEvent()->getProduct()
38
Q

What configuration parameters are available for cron jobs?

A

cron_expr to schedule

and model to run, with method name

39
Q

Explain lifecycle of a Block?

A

prepareLayout() called when after layout added to block
_beforeToHtml() called before block rendered HTML
_afterToHtml() called after a block’s HTML content is generated.
_beforeChildToHtml() called when a parent renders one of its children (through getChildHtml().

40
Q

What is the difference between payment method and payment classes (such as order_payment, quote_payment, etc.)?

A

Payment model is an abstract of an instance of payment method and it works with database.
Payment model can be:
Mage_Sales_Model_Order_Payment or Mage_Sales_Model_Quote_Payment
-
tables sales_flat_order_payment and sales_flat_quote_payment. Quote_Payment doesn’t have any method to process an order.

41
Q

Which method is used for translating strings, and on which types of objects is it generally available?

A

Class Mage_Core_Helper_Abstract
Method : underscore, underscore __()
Translation is done in helper objects

42
Q

What is the difference between “pay” and “capture” operations?

A

pay() - Registers payment and update self totals from the invoice
capture() - Requires an invoice. If none is specified, will automatically prepare an invoice for order
Updates transactions hierarchy, if required
Updates payment totals, updates order status and adds proper comments

43
Q

Which classes and methods are responsible for credit card operations (for example authorization or capturing)?

A 
Class Mage_Payment_Model_Method_Cc
Class Mage_Payment_Model_Method_Abstract:
Methods authorize() and capture()
44
Q

Which classes are involved, and which tables are used to store refund information?

A

Class: Mage_Sales_Model_Order_Creditmemo*
Table: sales_flat_creditmemo*

45
Q

How does Magento process taxes when refunding an order?

A

tax get refunded with order

Magento (1 decks)

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