41 Posts
3 years ago

Hi, I'm still working on my movie website. I'm trying to combine the worlds of action movies and quantitative analysis. To do this I have stored a lot of information in my movie content types and have several linked content types such as actors, directors, main characters etc.

What I want to do now is to aggregate this quantitative information by various dimensions. One example would be the average bodycount a certain main character (e.g. the Terminator) has across all of his movies. I want to be able to do this on the fly so that I don't have the update every related article after addig a movie. The movie content type should hold all the information including the links to the other content types and the other content types should get a substantial part of their information from the movie content type.

I have played around with the code pack and the SQL pack. I believe I need to use a Before Render field to pull the information via an SQL query and then store it on the fly in a field for the content item I am rendering. For pulling the average bodycount ("BC") for a main character ("actionheld") whose content view I am loading I believe the SQL query would have to be something like this:

	SELECT AVG BC FROM #__cck_store_item WHERE actionheld = 'cck->id'

However, I can't figure out how to run this SQL query in a before render field. I have read the "Using Code Pack"-tutorial, however, I am afraid I need some more guidance as I don't understand the coding enough.

Can anyone point me in the right direction on how to pull data from the SQL-database and calculate averages / sums on the fly? 

EDIT: To give you an example of the underlying information, here is a link to the character "Terminator": https://ratingaction.com/filme-und-mehr/actionhelden/terminator As you can see, I've been able to set up a list module that lists all movies where I have selected "Terminator" as main character. Now I would like to be able to calculate averages, sums etc. for the figures like BC, S5+ etc.

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41 Posts
3 years ago
Level 1

I can't believe it myself, but I got this to work. There was a lot of trial and error involved, but this is the code that made it work for me:

$db = JFactory::getDbo(); 
$query = $db->getQuery(true);

   ->select('AVG(bc) AS value_sum') 
   ->where($db->quoteName('actionheld')." = ".$fields['art_id']->value); 

$result = $db->loadResult();
$result = round($result);

$fields['bc_avg']->value = $result;

To make this work with the above code in the BeforeRender field I also added the article id field to the content view as hidden.

I'm actually quite excited about this, as it will allow me to run a number of quantitative analyses across the data set! 

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