Mash conflicting with ExtLib
Reported by Baby Diego | April 14th, 2009 @ 08:05 PM
Trying out retweet (http://github.com/zapnap/retweet/tree/master),
when you run rake twitter:status to fetch the results,
it throws a "stack level too deep" error.
Examining the issue with retweet's author and others, it was noticed that Mash is conflicting with ExtLib's own notion of a Mash class, which means that this breaks compatibility with anything that uses Extlib, as datamapper does – which was what was causing the problem in the app. As soon as a property is declared in Datamapper::Resource, the error is raised.
It seems to be a matter of namespace. Should I take this up to the ExtLib's team as well?
Comments and changes to this ticket
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Nick Plante April 20th, 2009 @ 10:35 AM
+1 yup this is causing all sorts of problems for me (because the Twitter gem uses Mash and DataMapper uses Extlib). Namespaces to the rescue?
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Mislav November 3rd, 2009 @ 03:37 PM
Since this Mash is better than extlib's, I've done the following to undef the latter's Mash before requiring twitter gem:
Object.send(:remove_const, :Mash) if defined? ::Mash require 'twitter' # fix for Mash v0.0.3 Mash.class_eval do def stringify_keys() self end endSeems to me that dm-core doesn't notice the difference.
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Mash is an extension of the Ruby Hash object to allow for pseudo-object syntax reminiscent of Javascript objects. It is useful for simple conversion of JSON or XML and also for configuration settings read from YAML.
Michael Bleigh
Mislav