Question

Right now I’m programming a plugin for the project managment app Redmine.
And since I’m new to Rails, I have a question about a query.

Redmine provides me with an Issue model. In my plugin I’m defining an additional IssueRates model, which has the following associations:

class IssueRates < ActiveRecord::Base
unloadable

belongs_to :issue,
...

However, I don’t want to change the standard Issue model to have a has_one association, to keep the redmine code as clean as possible.

But now I need a query like this:

project_issues=Issue.where(:project_id => some_id)
project_issues.each do |i|
    puts i.IssueRates.amount
end

Which obviously doesn’t work, because of the missing association. Is there a way to reverse this association? Because then, I could even use eager loading with .includes(:IssueRates).

If this is not possible, I could still get the IssueRates in a separate query…

Answer 1

I suppose you could do:

IssueRates.find_by_issue_id(i.id).amount

It seems like more work than just adding has_one to your Issue model.