Node::Attribute is surprising

David_Nolan · 2010-09-16 20:54:17 UTC

Hi,

It appears (0.9.8) you can use dot notation to retrieve an attribute
from an attribute once and only once. The second and subsequent times,
you may get one of several surprising error messages:

gist.github.com

https://gist.github.com/textgoeshere/582266

gistfile1.rb

>> node = Chef::Node.load(FQDN); nil
I, [2010-09-16T13:03:45.043798 #6792] INFO -- : CONNECT: [SERVER, 4000]
I, [2010-09-16T13:03:45.044017 #6792] INFO -- : GET /nodes/FQDN
I, [2010-09-16T13:03:48.330086 #6792] INFO -- : BODY: Net::HTTPOK
=> nil
>> x = node.lsb
=> #<Chef::Node::Attribute @auto_vivifiy_on_read=false, @automatic={...}, @default={...}, @current_normal=nil, @has_been_read=false, @current_automatic={"codename"=>"lucid", "id"=>"Ubuntu", "description"=>""Ubuntu 10.04.1 LTS"", "release"=>"10.04"}, normal{....}, set_typenil, state[:lsb], current_overridenil, set_unless_value_presentfalse, override{....}, current_defaultnil
>> x.codename
=> "lucid"
>> x.codename

This file has been truncated. show original

Is this expected behaviour? If not I’ll raise a ticket.

Cheers,
Dave

Seth_Falcon_01 · 2010-09-27 02:14:16 UTC

Hi Dave,

On Thu, Sep 16, 2010 at 1:54 PM, David Nolan dave@textgoeshere.org.uk wrote:

It appears (0.9.8) you can use dot notation to retrieve an attribute
from an attribute once and only once. The second and subsequent times,
you may get one of several surprising error messages:
http://gist.github.com/582266

Is this expected behaviour? If not I’ll raise a ticket.

No, that doesn’t sound like expected behavior. It looks like you did
file a ticket, so thanks for that.
I wasn’t able to reproduce the issue when I tried on my laptop. I’ll
update the ticket and let any further discussion be tracked there.

Cheers,

seth

Seth_Falcon_01 · 2010-09-27 02:14:59 UTC

Except to add a link to the ticket for anyone else following along:
http://tickets.opscode.com/browse/CHEF-1680

David_Nolan · 2010-09-27 07:21:28 UTC

Hi, just to close the loop the ticket is here
http://tickets.opscode.com/browse/CHEF-1680
Cheers,
Dave

On Mon, Sep 27, 2010 at 4:14 AM, Seth Falcon seth@opscode.com wrote:

Hi Dave,

On Thu, Sep 16, 2010 at 1:54 PM, David Nolan dave@textgoeshere.org.uk
wrote:

It appears (0.9.8) you can use dot notation to retrieve an attribute
from an attribute once and only once. The second and subsequent times,
you may get one of several surprising error messages:
http://gist.github.com/582266

Is this expected behaviour? If not I’ll raise a ticket.

No, that doesn’t sound like expected behavior. It looks like you did
file a ticket, so thanks for that.
I wasn’t able to reproduce the issue when I tried on my laptop. I’ll
update the ticket and let any further discussion be tracked there.

Cheers,

seth