Models: use associations more #2241
Description
A Workshop is a specialization of Event.
It has a method #host that breaks how "Active Relation" work - it forces a SQL query on each rendering (so that each Event template calls 11 queries to the DB, which could all have been there already), that is "N+1 queries".
app/models/workshop.rb:34:in `host'
app/presenters/workshop_presenter.rb:31:in `venue'
app/views/events/_event.html.haml:20:in `_app_views_events__event_html_haml___3133112490946951653_62480'
app/views/workshops/_workshop.html.haml:1:in `_app_views_workshops__workshop_html_haml___4439689423734540482_62460'
app/views/dashboard/show.html.haml:74:in `block in _app_views_dashboard_show_html_haml___154197011926960493_62020'