Module: ActiveRecordInCache::Methods::ClassMethods

Defined in:
lib/active_record_in_cache.rb

Instance Method Summary collapse

Instance Method Details

#in_cache(column = :updated_at, options = {}, &block) ⇒ Object

Returns records while automatically caching with the SQL to execute and the value of maximum(:updated_at) as key.

Article.all.in_cache
# SELECT MAX("articles"."updated_at") FROM "articles"
# SELECT "articles".* FROM "articles"
#=> #<ActiveRecord::Relation ...>

Article.all.in_cache
# SELECT MAX("articles"."updated_at") FROM "articles"
#=> #<ActiveRecord::Relation ...>

column

If a column is passed, then uses this as the maximum argument.

Article.all.in_cache(:published_at)
# SELECT MAX("articles"."published_at") FROM "articles"
# SELECT "articles".* FROM "articles"
#=> #<ActiveRecord::Relation ...>

options

Supports the same arguments as Rails.cache.

Article.all.in_cache(expires_in: 5.minutes)



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# File 'lib/active_record_in_cache.rb', line 39

def in_cache(column = :updated_at, options = {}, &block)
  value = block_given? ? all.instance_exec(&block) : all.maximum(column)
  name = "#{all.to_sql}_#{value}"
  Rails.cache.fetch(name, options) { all.to_a }
end