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The error page tells you that line 1 contains an error and shows you the code around line 1 in your browser. As you can see, the page generates an error when it tries to call the size method on the @posts instance variable. This is because we haven t initialized the @posts variable in the controller. Fixing the page requires completing the following tasks: Change the index action in the controller to retrieve a paginated list of posts. Create a view helper containing the display_as_threads method. This method is used to display the forum posts.

// Set the store code $store_view_code = 'dollarstore'; // using SOAP method $result = $client->call($session_id, 'catalog_product_attribute_media.currentStore', $store_view_code); // returns the store_id echo $result;

Sequences and mappings are basically collections of items To implement their basic behavior (protocol), you need two magic methods if your objects are immutable, four if they are mutable: __len__(self): This method should return the number of items contained in the collection For a sequence, this would simply be the number of elements; for a mapping, it would be the number of key-value pairs If __len__ returns zero (and you don t implement __nonzero__, which overrides this behavior), the object is treated as false in a Boolean context (as with empty lists, tuples, strings, and dictionaries) __getitem__(self, key): This should return the value corresponding to the given key For a sequence, the key should be an integer from zero to n 1 (or, it could be negative, as noted later), where n is the length of the sequence; for a mapping, you could really have any kind of keys.

Start by changing the index action. Open app/controllers/forum_controller.rb in an editor and modify the index action as follows: def index @page_title = 'Forum' @post_pages, @posts = paginate :forum_posts, :per_page => 20, :order => 'root_id desc, lft' end The paginate method is used to retrieve a paginated list of ForumPost objects. Furthermore, we specify that we want to show a maximum of 20 posts per page, and that the posts should be ordered by the root_id and the lft columns. You can try to access the page again in your browser or run the integration test. Both should fail with an error being shown, because the display_as_threads method is not found.

Method: catalog_product_attribute_media.list ($product_id, $store_view_code)

Displaying a list of posts requires a fair amount of code, as each post can have one or more replies, and these need to be shown as a thread. To avoid cluttering the view with too much Ruby code, we will use a view helper to generate the list of posts.

__setitem__(self, key, value): This should store value in a manner associated with key, so it can later be retrieved with __getitem__ Of course, you define this method only for mutable objects __delitem__(self, key): This is called when someone uses the del statement on a part of the object, and should delete the element associated with key Again, only mutable objects (and not all of them only those for which you want to let items be removed) should define this method Some extra requirements are imposed on these methods: For a sequence, if the key is a negative integer, it should be used to count from the end In other words, treat x[-n] the same as x[len(x)-n] If the key is of an inappropriate type (such as a string key used on a sequence) a TypeError may be raised.

Description: Returns a list of product images given the product_id. Return: Array. Arguments: $product_id (required). Pulls all images associated to this product_id or product_sku. $store_view_code (optional). Select Admin Panel, System, Manage Stores; select a store under the Store View Name, and you ll find the code listed there.

Tip Putting too much code in the view is usually a bad idea. If you see that your view is getting cluttered with Ruby code, you can refactor it and move the code to a view helper, controller, or another part of the system.