SnippetsA Data Object Manager Cheatsheet

6 October 2010 | Aram Balakjian | DataObjects, DataObjectManger

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We all love the DataObject Manager (DOM, not to be confused with the Document Object Model) as well as its creator UncleCheese of LeftAndMain.com. However one thing which has always frustrated me is having to look back through my code or even worse having to search the forums to find that function to set the upload folder, or create a filter for my DOM. So here within this page, lies a comprehensive list of all the things you can do with your DOM and File/ImageDOM. Viva la DOM!

SnippetsA _config.php Cheatsheet

2 July 2010 | Aram Balakjian | Images, Site Tree, DataObjects, Forms | Supports v2.4

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If your anything like me, you've probably found yourself going through your previous sites looking for that line of code to put in your _config.php file. Well, now you nolonger need to, simply bookmark this page and return to it any time you need to add a line to your config! And if I've missed out anything leave a comment and I'll make sure it gets added :)

SnippetsOptimizing Complex Models

4 November 2010 | Hamish Campbell | DataObjects, Database, Relations | Supports v2.4, v2.3

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The SilverStripe ORM engine (Sapphire) makes working with your database a breeze, but that simplicity comes at a cost. Each database query contributes to slower page load times and a complicated data structure can create significant performance issues.

Here are a number of strategies that can be employed to improve your website query performance:

SnippetsGetting items from a has_many or many_many relation

7 October 2010 | Aram Balakjian | DataObjects, Database, Relations | Supports v2.4, v2.3

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Have you ever found yourself using DataObject::get() to fetch objects in a has_many so that you can filter/sort them easily?

Well as it happens there is no need to do this thanks to a totally undocumented bit of code!

SnippetsPreventing malicious SQL injections

12 March 2010 | Daniel Hensby | Security, DataObjects, Database | Supports v2.4, v2.3

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PHP has a very shallow learning curve, it's free and anyone can have a go at making a website by following a few tutorials and implementing their experience with other languages. However, coding for the web can be a risky business, especially with dynamic websites that take some kind of user (or external) input and use that to get data from a database.

SnippetsManipulating every Nth item in a <% control %> loop

16 July 2009 | Aram Balakjian | DataObjects, Templates | Supports v2.4, v2.3

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Often you will want to manipulate every nth item inside a <% control %> loop. For example say you had a gallery and you wanted every 3rd image to start on a new line, you need to be able to test each item from the template to see if it is divisible by 3 and should therefore have the clear CSS class added to it.

SnippetsDisplaying Fields From a Set of Pages on Another Page

25 May 2009 | Aram Balakjian | DataObjects, Templates, Database | Supports v2.4, v2.3

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Although ultimately requiring very little code, displaying data from a set of pages on another page can seem confusing for those new to SilverStripe. This example will display all of the Images from all the staff pages on our current page. This works by first returning all the staff pages to our template and cycling through each of them, drawing the Image for each one.