0.3.6 - NoMethodError: undefined method `find' for Object:Class

[antulik]

Using mongoid 2.0. Works in steama 0.3.5, but not in 0.3.6.

NoMethodError: undefined method `find' for Object:Class
    from /Users/anton/.rvm/gems/ruby-1.9.3-p194@oddsense/gems/streama-0.3.6/lib/streama/activity.rb:90:in `load_instance'
    from /Users/anton/.rvm/gems/ruby-1.9.3-p194@oddsense/gems/streama-0.3.6/lib/streama/activity.rb:78:in `publish'
    from /Users/anton/.rvm/gems/ruby-1.9.3-p194@oddsense/gems/streama-0.3.6/lib/streama/activity.rb:55:in `publish'
    from /Users/anton/.rvm/gems/ruby-1.9.3-p194@oddsense/gems/streama-0.3.6/lib/streama/actor.rb:29:in `publish_activity'
    from (irb):3

did some debugging:

error happens here: https://github.com/christospappas/streama/blob/master/lib/streama/activity.rb#L90

    def load_instance(type)
      (data = self.read_attribute(type)).is_a?(Hash) ? data['type'].to_s.camelcase.constantize.find(data['id']) : data
    end

type == :actor self.read_attribute(type) returns hash which has '_type' but no 'type' key.

After plain a bit more and reverting that line https://github.com/christospappas/streama/commit/9010eebb8f509567adfb717fbd4e0c0a630ce835#L2R11

to this:

    field :actor,         :type => Hash

I have only actor but probably other fields will have the same issue.

Everything works after that reverted line. self.read_attribute(type) returns Object but not hash. Can't really explain that behaviour, but hopefully it will give you some ideas where to look.

[khoan]

This is how mongoid 2.0 set attributes

bam = Object.new
def bam.attributes
  {bam: "bam", _id: "123", _type: "Bam"}
end

class Bam
  include Mongoid::Document

  field :bam
  field :fam, type: Hash
end

result = Bam.new(bam: bam, fam: bam)
result.bam
# => {"bam" => "bam", "_id" => "123", "_type" => "Bam"}
result.fam
# => #<Object...>

I fathom that this is what is tripping streama load_instance. So if we patch up lib/streama/actor.rb , then should be better.

# Caveat: this is untested
#
# open up Streama::Actor and patch
#
# pristine code is located here lib/streama/actor.rb
module Streama
  module Actor
    def publish_activity(name, options={})
      options[:receivers] = self.send(options[:receivers]) if options[:receivers].is_a?(Symbol)
      data = {:actor => {"id" => self.id, "type" => self.class.name}}.merge(options) # explicitly set id and type key
      activity = activity_class.publish(name, data)
    end
  end
end

[christospappas]

Streama >= 3.6 requires Mongoid 3. The Gemfile has been updated to require this.