Finders
These types of classes are responsible for retrieving collection items based on different conditions. They prevent lookup methods in models like this:
class Project < ApplicationRecord
def issues_for_user_filtered_by(user, filter)
# A lot of logic not related to project model itself
end
end
issues = project.issues_for_user_filtered_by(user, params)
The GitLab approach is to use a Finder:
issues = IssuesFinder.new(project, user, filter).execute
It will help keep models thinner.