2
0
Fork 0
mirror of https://github.com/discourse/discourse.git synced 2025-09-06 10:50:21 +08:00
discourse/lib/theme_modifier_helper.rb
Alan Guo Xiang Tan 8e3691d537 PERF: Eager load Theme associations in Stylesheet Manager.
Before this change, calling `StyleSheet::Manager.stylesheet_details`
for the first time resulted in multiple queries to the database. This is
because the code was modelled in a way where each `Theme` was loaded
from the database one at a time.

This PR restructures the code such that it allows us to load all the
theme records in a single query. It also allows us to eager load the
required associations upfront. In order to achieve this, I removed the
support of loading multiple themes per request. It was initially added
to support user selectable theme components but the feature was never
completed and abandoned because it wasn't a feature that we thought was
worth building.
2021-06-21 11:06:58 +08:00

12 lines
331 B
Ruby

# frozen_string_literal: true
class ThemeModifierHelper
def initialize(request: nil, theme_ids: nil)
@theme_ids = theme_ids || [request&.env&.[](:resolved_theme_id)]
end
ThemeModifierSet.modifiers.keys.each do |modifier|
define_method(modifier) do
Theme.lookup_modifier(@theme_ids, modifier)
end
end
end