[chef] Re: Re: Re: Re: Re: Array attributes merge

["aL." < >]

Hi Noah!

I have read it ofc. But the thing is that array attributes dont are set-unioned  when you define the attr on a recipe. That is the thing.

When you use roles + defaults.rb file it works as you say on your blog. But when using defaults.rb file and recipe attrs, it doesnt work!

--
Si necesitas una máquina para hacer algo y no la compras al final te darás cuenta de que has pagado lo mismo y no tienes la máquina.--Henry Ford

Alberto

On Tue, Oct 22, 2013 at 7:32 AM, Noah Kantrowitz < " target="_blank"> > wrote:

https://coderanger.net/2013/06/arrays-and-chef/ goes over this in great detail :)

--Noah

On Oct 21, 2013, at 11:27 PM, "aL." < "> > wrote:

> Even += works in order to append values he he.
>
> May be that recipes attr definitions just override attr files ones.
>
> Mike: I have checked out that arrays merge works well on defaults attr files + defaults on role. So environment and roles examples on the link, are just examples, i think.
>
> Can a opscode dev, explain what is the exactly behaviour with arrays on attributes? Looks like it depends where you define the attr override works as expected o_O
>
> El 21/10/2013 16:22, "Luke Bradbury" < "> > escribió:
> My experience with this issue was similar, however I found that << doesn't play nice with the autovivification.
> Consequently I've been using this pattern as a workaround:
>
>
>
>
> node.default['foo'] = node['foo'].to_a.push('bar')
>
> Regards,
> Luke
>
>
> On 21 October 2013 16:04, Michael Glenney < "> > wrote:
> I don't have a complete answer but I know that:
>
> 1)  The doc you linked to specifically calls out roles and environments. Might be a clue
> 2)  When writing a provider for a cookbook attributes are mutable. So maybe this will work for you within a recipe:
>
> node.default['foo'] << 'bar'
>
> Sent from my iPhone
>
> On Oct 21, 2013, at 5:22 AM, "aL." < "> > wrote:
>
>> Hi guys!
>>
>> According to this: http://docs.opscode.com/essentials_node_object_deep_merge.html#addition
>>
>> Array attributes are merged, i have checked out that this is the behaviour when using default attributes on attribute files and roles.
>>
>> But when i try to define a default attribute on one recipe:
>>
>> node.default['foo'] = ['bar']
>>
>> The one that i have already on defaults.rb attribute file:
>>
>> node.default['foo'] = ['littlebar']
>>
>> Is overrided by the one i defined on the recipe, resulting node['foo'] = ['bar']
>>
>> Defining on  a role:
>>
>> default_attributes (:foo => ['bar'])
>>
>> Works as expected, and results on node['foo']  = ['littlebar','bar']
>>
>> So what exactly node.default['x'] = value do on recipes? Looks like a direct override... O_o
>>
>> --
>> Si necesitas una máquina para hacer algo y no la compras al final te darás cuenta de que has pagado lo mismo y no tienes la máquina.--Henry Ford
>> Alberto
>