Facebooker talk - Mar 2008 - ActionView::TemplateError when FQL query does not return any results

I submitted this as a bug here:
http://rubyforge.org/tracker/index.php?func=detail&aid=18799&group_id=4187&atid=16130

However, I just realized that I probably should have posted here first. Has
anyone else had a similar experiance with queries that don''t return
results?

I have the following FQL Query:

"SELECT uid FROM user WHERE has_added_app = 1 AND uid IN (SELECT uid2 FROM
friend WHERE uid1
= #{@current_facebook_user.id})"


It usually works just fine. However, in the unlikely case where a user has
no friends, I get this error:

ActionView::TemplateError (You have a nil object when you didn''t expect
it!
The error occurred while evaluating nil.name)

If a make these changes ...

Index: vendor/plugins/facebooker/lib/facebooker/parser.rb
==================================================================---
vendor/plugins/facebooker/lib/facebooker/parser.rb (revision 200)
+++ vendor/plugins/facebooker/lib/facebooker/parser.rb (working copy)
@@ -249,7 +249,11 @@
def self.process(data)
root = element(''fql_query_response'', data)
first_child = root.children.reject{|c| c.kind_of?(REXML::Text)}.first
- [first_child.name, array_of_hashes(root, first_child.name)]
+ if first_child.nil?
+ [nil, array_of_hashes(root, nil)]
+ else
+ [first_child.name, array_of_hashes(root, first_child.name)]
+ end
end
end

===================================================================
... then things seem to work well.

I am sorry that I don''t yet know enough about the facebook api or
facebooker
to turn this into a real patch.
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