method

delete_matched

v7.1.3.4 - Show latest stable - 0 notes - Class: RedisCacheStore

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What's this?

delete_matched(matcher, options = nil) public

Supports Redis KEYS glob patterns:

h?llo matches hello, hallo and hxllo
h*llo matches hllo and heeeello
h[ae]llo matches hello and hallo, but not hillo
h[^e]llo matches hallo, hbllo, ... but not hello
h[a-b]llo matches hallo and hbllo

Use \ to escape special characters if you want to match them verbatim.

See redis.io/commands/KEYS for more.

Failsafe: Raises errors.

Show source

# File activesupport/lib/active_support/cache/redis_cache_store.rb, line 198
      def delete_matched(matcher, options = nil)
        instrument :delete_matched, matcher do
          unless String === matcher
            raise ArgumentError, "Only Redis glob strings are supported: #{matcher.inspect}"
          end
          redis.then do |c|
            pattern = namespace_key(matcher, options)
            cursor = "0"
            # Fetch keys in batches using SCAN to avoid blocking the Redis server.
            nodes = c.respond_to?(:nodes) ? c.nodes : [c]

            nodes.each do |node|
              begin
                cursor, keys = node.scan(cursor, match: pattern, count: SCAN_BATCH_SIZE)
                node.del(*keys) unless keys.empty?
              end until cursor == "0"
            end
          end
        end
      end

delete_matched

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