Module: Mongoid::QueryCache::View

Extended by:

ActiveSupport::Concern

Defined in:

lib/mongoid/query_cache.rb

Overview

Contains enhancements to the Mongo::Collection::View in order to get a cached cursor or a regular cursor on iteration.

Since:

• 5.0.0

Instance Method Summary

• #each ⇒ Object

  Override the default enumeration to handle if the cursor can be cached or not.

Instance Method Details

#each ⇒ Object

Override the default enumeration to handle if the cursor can be cached or not.

Examples:

Iterate over the view.

view.each do |doc|
  # ...
end

Since:

• 5.0.0

# File 'lib/mongoid/query_cache.rb', line 220

def each
  if system_collection? || !QueryCache.enabled?
    super
  else
    unless cursor = cached_cursor
      read_with_retry do
        server = server_selector.select_server(cluster)
        cursor = CachedCursor.new(view, send_initial_query(server), server)
        QueryCache.cache_table[cache_key] = cursor
      end
    end
    cursor.each do |doc|
      yield doc
    end if block_given?
    cursor
  end
end