instance method
cache_key
Ruby on Rails 6.0.6
Since v5.2.8.1Signature
cache_key(timestamp_column = :updated_at)Returns a stable cache key that can be used to identify this query. The cache key is built with a fingerprint of the SQL query.
Product.where("name like ?", "%Cosmic Encounter%").cache_key
# => "products/query-1850ab3d302391b85b8693e941286659"
If ActiveRecord::Base.collection_cache_versioning is turned off, as it was in Rails 6.0 and earlier, the cache key will also include a version.
ActiveRecord::Base.collection_cache_versioning = false
Product.where("name like ?", "%Cosmic Encounter%").cache_key
# => "products/query-1850ab3d302391b85b8693e941286659-1-20150714212553907087000"
You can also pass a custom timestamp column to fetch the timestamp of the last updated record.
Product.where("name like ?", "%Game%").cache_key(:last_reviewed_at)
Parameters
-
timestamp_columnopt = :updated_at
Source
# File activerecord/lib/active_record/relation.rb, line 311
def cache_key(timestamp_column = :updated_at)
@cache_keys ||= {}
@cache_keys[timestamp_column] ||= klass.collection_cache_key(self, timestamp_column)
end
Defined in activerecord/lib/active_record/relation.rb line 311
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Defined in ActiveRecord::Relation