gitlab-org--gitlab-foss/app/services/base_count_service.rb
Yorick Peterse 3e561736b2
Cache the number of user SSH keys
By caching the number of personal SSH keys we reduce the number of
queries necessary on pages such as ProjectsController#show (which can
end up querying this data multiple times).

The cache is refreshed/flushed whenever an SSH key is added, removed, or
when a user is removed.
2017-11-16 14:59:38 +01:00

34 lines
714 B
Ruby

# Base class for services that count a single resource such as the number of
# issues for a project.
class BaseCountService
def relation_for_count
raise(
NotImplementedError,
'"relation_for_count" must be implemented and return an ActiveRecord::Relation'
)
end
def count
Rails.cache.fetch(cache_key, raw: raw?) { uncached_count }.to_i
end
def refresh_cache
Rails.cache.write(cache_key, uncached_count, raw: raw?)
end
def uncached_count
relation_for_count.count
end
def delete_cache
Rails.cache.delete(cache_key)
end
def raw?
false
end
def cache_key
raise NotImplementedError, 'cache_key must be implemented and return a String'
end
end