instance method `exist?`

Ruby on Rails 4.2.9

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

exist?(name, options = nil)

Returns true if the cache contains an entry for the given key.

Options are passed to the underlying cache implementation.

Parameters

name req
options opt = nil

Source

# File activesupport/lib/active_support/cache.rb, line 409
      def exist?(name, options = nil)
        options = merged_options(options)

        instrument(:exist?, name) do
          entry = read_entry(namespaced_key(name, options), options)
          (entry && !entry.expired?) || false
        end
      end

Defined in activesupport/lib/active_support/cache.rb line 409 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::Cache::Store

Signature

Parameters