Performing two conditional counts on foreign key fields

[luccascorrea]

I am just posting this because the documentation advises to file a ticket whenever it is not possible to not use a queryset's "extra" method when performing a query.

I was not able to perform the following query using only the ORM and not relying on the "extra" method:

class Article(model.Model):
    title = models.CharField(max_length=100, null=True)
    body = models.TextField(null=True)
    pubDate = models.DateTimeField()

class ArticleLike(models.Model):
    article = models.ForeignKey('article.Article')
    author = models.ForeignKey('accounts.User')

class ArticleView(models.Model):
    article = models.ForeignKey('article.Article')
    author = models.ForeignKey('accounts.User')


articles = Article.objects.extra(select={
    "likesCount": "SELECT COUNT(DISTINCT `article_articlelike`.`id`) FROM `article_articlelike` WHERE `article_articlelike`.`date` >= `article_article`.`pubDate` AND `article_articlelike`.`article_id` = `article_article`.`id`",
        "viewsCount": "SELECT COUNT(DISTINCT `article_articleview`.`id`) FROM `article_articleview` WHERE `article_articleview`.`date` >= `article_article`.`pubDate` AND `article_articleview`.`article_id` = `article_article`.`id`"

To make it clearer, the question this query is trying to answer is: how many likes and views did each article receive after it was published?

It seems kind of odd that an article would be liked and viewed before being published but the thing is that the article could be republished and in this situation its pubDate would be updated, and so it should not take into account the likes/views received before being republished, however these likes/views cannot be deleted as to maintain a history of likes/views.

So the problem is simple, two simultaneous conditional counts, where the condition is in two foreign keys.

I was not able to use "annotate(likesCount=..., viewsCount=..)" because the "count" ends up multiplying both annotations.