I have an Articles model.
And a Moderations model.
And a Users model.
Articles have many Users (moderators) through Moderations.
Users have many Articles (moderated articles) through Moderations.
This works fine so far. I can link up a user with all their moderated
But, I’d like a find which would select all the Articles, except it
hides (does not return) the articles the current user has moderated. I
am currently doing this in Ruby in two stages like this:
@articles_list = Article.find(:all, :conditions => [“start_date >= ?”,
today], :order => ‘start_date’)
@articles_list -= current_user.moderated_articles if current_user
And then displaying the articles list.
This works, but I fully suspect it is cripplingly slow, and I’d also
like to paginate these articles and all the pagination tutorials seem to
warn against fetching everything in one go. This seems like good advice.
So I am seeking guidance on a join condition that would do what I want.
I’m guessing I need an inner join on the article_id on the moderations
table, but need to make sure that the user_id of those records are the
same as the current user only. So this is confusing me a bit.
Many thanks for any help you may offer!