Loop within Loop in Rails Controller

Question

I am trying to retrieve from my database all posts and list them in DESC order with respect to their creation date. So far I have managed to test for all posts that belong t

Answer 1

You are overwriting @posts with each iteration. Try this:

def index
    @institution = Institution.find(current_user.institution.id)
    @categories = Category.all
    @posts = []
    @categories.each do |category|
      tposts = Post.where("category_id = ? and institution_id = ?", category, @institution).order("created_at DESC")
      @posts += tposts if tposts
    end
    authorize! :read, @post
    respond_with(@posts)
end

To retrieve all posts with non null category_id, try this:

def index
    @institution = Institution.find(current_user.institution.id)
    @categories = Category.all
    @posts = Post.where("category_id is not null and institution_id = ?", @institution).order("created_at DESC")
    authorize! :read, @post
    respond_with(@posts)
end

Change is not null to > 0 for integer category_id or != '' if your table contains '' instead of nulls.

Good luck.