NoMethodError (undefined method `tag=' for #<Hash:0x64c1ac0>)

[indiepopart]

Hi!

I'm trying to send a delayed email:

UserMailer.delay.gift_confirmed_email(gift)

And I get NoMethodError (undefined method `tag=' for #Hash:0x64c1ac0)

In environment.rb I have:

require 'yaml'
YAML::ENGINE.yamler = 'syck'

Gems included by the bundle:

• acl9 (0.12.0)
• actionmailer (3.2.8)
• actionpack (3.2.8)
• activemodel (3.2.8)
• activerecord (3.2.8)
• activeresource (3.2.8)
• activesupport (3.2.8)
• arel (3.0.2)
• authlogic (3.1.3)
• builder (3.0.3)
• bundler (1.1.4)
• cocaine (0.3.2)
• coffee-rails (3.2.2)
• coffee-script (2.2.0)
• coffee-script-source (1.3.3)
• columnize (0.3.6)
• debugger (1.2.0)
• debugger-linecache (1.1.2)
• debugger-ruby_core_source (1.1.3)
• delayed_job (3.0.3)
• delayed_job_active_record (0.3.2)
• erubis (2.7.0)
• execjs (1.4.0)
• gdata_19 (1.1.5)
• hike (1.2.1)
• i18n (0.6.1)
• journey (1.0.4)
• jquery-rails (2.1.3)
• json (1.7.5)
• mail (2.4.4)
• metaclass (0.0.1)
• mime-types (1.19)
• mocha (0.12.6)
• multi_json (1.3.6)
• mysql2 (0.3.11)
• nested_form (0.2.3)
• nifty-generators (0.4.6)
• paperclip (3.2.0)
• pg (0.14.0)
• polyglot (0.3.3)
• rack (1.4.1)
• rack-cache (1.2)
• rack-ssl (1.3.2)
• rack-test (0.6.2)
• rails (3.2.8)
• rails3-generators (0.17.6)
• railties (3.2.8)
• rake (0.9.2.2)
• rdoc (3.12)
• remotipart (1.0.2)
• ruby-mysql (2.9.10)
• rufus-scheduler (2.0.17)
• sass (3.2.1)
• sass-rails (3.2.5)
• sprockets (2.1.3)
• sqlite3 (1.3.6)
• thor (0.16.0)
• tilt (1.3.3)
• transitions (0.1.1)
• treetop (1.4.10)
• tzinfo (0.3.33)
• uglifier (1.3.0)
• wicked (0.2.0)
• will_paginate (3.0.3)

ruby 1.9.3p194 (2012-04-20) [i386-mingw32]

I will appreciate any advice.
Thank you!

[wrodenbusch]

+1

[albus522]

Move

require 'yaml'
YAML::ENGINE.yamler = 'syck'

to config/application.rb after

require File.expand_path('../boot', __FILE__)

and before

if defined?(Bundler)
  # If you precompile assets before deploying to production, use this line
  Bundler.require(*Rails.groups(:assets => %w(development test)))
  # If you want your assets lazily compiled in production, use this line
  # Bundler.require(:default, :assets, Rails.env)
end

[constantm]

@albus522's solution worked for me, thanks!

[hrdwdmrbl]

Okay, this solves the problem. Thank you!

But, could you please explain why this problem occurs? I'm interested because of another issue we had with YaML de-serialization once.

[albus522]

When you require yaml before boot, bundler is not setup yet and weird things happen.

[joker-777]

We are having the same error but in conjunction with IdentityCache https://github.com/Shopify/identity_cache
Internally it uses

record = <a model object>
coder = { :class => record.class }
record.encode_with(coder)

You overwrite encode_with with

def encode_with_override(coder)
  encode_with_without_override(coder)
  coder.tag = "!ruby/ActiveRecord:#{self.class.name}"
end

but the coder is a Hash object, with doesn't have a tag attribute. What do you expect to be a coder? It obviously also breaks with other gems.

[fffanatics]

+1, we're seeing the same problem that @joker-777 is seeing. Any thoughts on how to fix?

Edit: I added

require 'yaml'
YAML::ENGINE.yamler = 'syck'

To my application.rb as suggested above. This was able to get normal fetch operations working but only if I didn't have any assocaitions (ie: cache_has_many, etc). If I add those, it fails every time with:

TypeError: can't convert Hash into String
from ~/.rvm/gems/ruby-1.9.3-p484/gems/json-1.8.1/lib/json/common.rb:155:in `initialize'

Thoughts?

[berk]

@joker-777 i am doing the same thing, identity_cache + delayed_job and they don't seem to like each other in the same app. what did you end up doing?

[DavidBennettPIO]

I got identity_cache in ruby 2.1.2 working by override the override and checking for a Hash.

ActiveRecord::Base.class_eval do
  def encode_with_override_override(coder)
    encode_with_without_override(coder)
    coder.tag = "!ruby/ActiveRecord:#{self.class.name}" unless coder.is_a? ::Hash
  end
  alias_method :encode_with, :encode_with_override_override
end