Module: Mongoid::QueryCache::View Deprecated

Extended by:
ActiveSupport::Concern
Defined in:
lib/mongoid/query_cache.rb

Overview

Deprecated.

This module is only used with driver versions 2.13 and lower.

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 collapse

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



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# File 'lib/mongoid/query_cache.rb', line 271

def each
  if system_collection? || !QueryCache.enabled? || (respond_to?(:write?, true) && write?)
    super
  else
    @cursor = nil
    unless @cursor = cached_cursor
      session = client.send(:get_session, @options)
      read_with_retry(session, server_selector) do |server|
        result = send_initial_query(server, session)
        if result.cursor_id == 0 || result.cursor_id.nil?
          @cursor = CachedCursor.new(view, result, server, session: session)
          QueryCache.cache_table[cache_key] = @cursor
        else
          @cursor = Mongo::Cursor.new(view, result, server, session: session)
        end
      end
    end
    if block_given?
      if limit
        @cursor.to_a[0...limit].each do |doc|
          yield doc
        end
      else
        @cursor.each do |doc|
          yield doc
        end
      end
    else
      @cursor.to_enum
    end
  end
end