Using Tumblr gem with custom domains

This is really just a note for google’s benefit. It took me way too long to figure this issue out.

The Tumblr gem seems to barf when used with a custom domain name.

Tumblr::Post.all(:num => 5)

Results in a whiny nill exception somewhat like this:

NoMethodError: You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]
	from .../vendor/gems/jeffkreeftmeijer-tumblr-0.1.3/lib/tumblr/post.rb:25:in `count'
	from .../vendor/gems/jeffkreeftmeijer-tumblr-0.1.3/lib/tumblr/post.rb:47:in `find_every'
	from .../vendor/gems/jeffkreeftmeijer-tumblr-0.1.3/lib/tumblr/post.rb:9:in `find'
	from .../vendor/gems/jeffkreeftmeijer-tumblr-0.1.3/lib/tumblr/post.rb:75:in `all'
	from (irb):2

Some debugging showed that HTTParty was returning the page text instead of a hash representing the XML. The docs say that the format is parsed based on the content type:

Automatic parsing of JSON and XML into ruby hashes based on response content-type

A quick chat with jnunemaker revealed the :format option to HTTParty.get, and it looks like the Tumblr gem kindly passes all options down to that call. So the fix is as simple as:

Tumblr::Post.all(:num => 5, :format => :xml)

Hope that helps out some other poor bastard trying to figure this out.

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