Undefined method 'map' for nil:NilClass when calling 'groups' on AddressBook object.

[ryanlntn]

When calling groups() on an AddressBook object I get the following error:

addr_book.rb:38:ingroups': undefined method map' for nil:NilClass (NoMethodError)

Tracing that back we have:

def groups
  ab.all_groups.map do |ab_group|
    AddressBook::Group.new(:ab_group => ab_group, :address_book => ab.ab)
  end
end

def all_groups
  ABAddressBookCopyArrayOfAllGroups(ab)
end

My understanding from the Apple docs is that ABAddressBookCopyArrayOfAllGroups() should return an array. What's going on here?

[jmay]

Documentation is not always to be trusted. I've been hunting down a bunch of issues of this sort, guess I missed this one (or possibly introduced it while fixing others). Are you seeing this on iOS6 or 7?

Simple fix is:

def all_groups
  ABAddressBookCopyArrayOfAllGroups(ab) || []
end

but I want to make sure its reproducible and we have proper test cases before I push out a patch.

[ryanlntn]

I'm seeing it on iOS7. I haven't been able to get the simulator to run for iOS6. You wouldn't happen to know anything about this error would you?

dyld: Library not loaded: /System/Library/Frameworks/MediaAccessibility.framework/MediaAccessibility
  Referenced from: /Users/ryanlntn/Library/Application Support/iPhone Simulator/6.0/Applications/3C081A97-2E91-4C00-82C1-4D4D11B6B81E/Obispo.app/Obispo
  Reason: image not found

I'm able to run the iOS6 simulator for other RubyMotion apps.

[jmay]

I should have asked if you were running XCode4 or 5. If you're on iOS7 then clearly you are on 5. I haven't been successful getting XCode5 to build an iOS6 app, so I switch between Xcode versions when switching targets.

That error is definitely my fault, it's apparently debris from an app that I'm building that uses the motion-addressbook gem. I don't understand how that stuff from an app could get into a gem. Investigating now. Perhaps I'm checking something into git that should be ignored.

[jmay]

Ryan, I still can't reproduce your errors. Could you please try a couple of things:

• make sure you have latest RubyMotion 2.9
• make sure you have the latest version (1.6.1) of the gem
• if that doesn't work, try my fork

[ryanlntn]

Ah I see. RubyGems was referencing version 1.5.0. It works now that I'm pulling the latest version from Github.

[jmay]

That's a huge relief.