[chef] Re: Re: new_resource ref

[Paul McCallick < >]

Perfect, thanks

On 7/1/14, 8:48 AM, "Daniel DeLeo" 
<
 >
 wrote:

>
>
>On Tuesday, July 1, 2014 at 8:39 AM, 
>
 
> wrote:
>
>> I'm creating an lwrp and in the provider i'm creating a template.
>>inside the
>> template block @new_resource returns nil but new_resource gets a ref.
>>outside
>> the block either works. why?
>>  
>> I want to get a better understanding of what is going on.
>The blocks you pass to a resource declaration are evaluated using
>`instance_eval`, which changes the context in which the code is evaluated
>to be ³inside² the resource object. In the normal recipe case, you have:
>
># `self` here is a Chef::Recipe object
>template(³name²) do
>  # `self` here is a Chef::Resource::Template object
>end
>
>To make this a little nicer in the LWRP case, resources in LWRPs have a
>reference to their parent object (your provider class) and they forward
>any unknown methods (in your case `new_resource`) to the parent.
>
>This is a pretty in-depth explanation of how Œself¹ in ruby gets
>manipulated by various kinds of `eval`, if you want to learn more:
>http://yehudakatz.com/2009/11/15/metaprogramming-in-ruby-its-all-about-the
>-self/
>
>HTH,
>
>--  
>Daniel DeLeo
>
>
>