HWRP Array attribute not reset

Chef Infra (archive)
1

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
  set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis

2

Can you give an example of how you are using it?

--Noah

On Mar 11, 2014, at 3:19 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
  set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis

3

Attribute Sample:

node[‘servers’][‘main’][‘external_addresses’] = %w { 33.33.33.33 }

Recipe Context:

node[’servers’].each do |name, options|
server name do
external_addresses options[‘external_addresses’]
end
end

Then, if I update that attribute value to, say %w{ 33.33.33.30 }, the resource loads with both addresses.

Curtis

On Mar 11, 2014, at 5:20 PM, Noah Kantrowitz <noah@coderanger.netmailto:noah@coderanger.net> wrote:

Can you give an example of how you are using it?

–Noah

On Mar 11, 2014, at 3:19 PM, “Stewart, Curtis” <cstewart@momentumsi.commailto:cstewart@momentumsi.com> wrote:

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis

4

You are probably running in to the merge behavior of arrays in node attributes. Check out Arrays and Chef Attributes – Noah Kantrowitz for more info.

--Noah

On Mar 11, 2014, at 3:35 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

Attribute Sample:

node[‘servers’][‘main’][‘external_addresses’] = %w { 33.33.33.33 }

Recipe Context:

node[’servers'].each do |name, options|
server name do
external_addresses options['external_addresses']
end
end

Then, if I update that attribute value to, say %w{ 33.33.33.30 }, the resource loads with both addresses.

Curtis

On Mar 11, 2014, at 5:20 PM, Noah Kantrowitz noah@coderanger.net wrote:

Can you give an example of how you are using it?

--Noah

On Mar 11, 2014, at 3:19 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis

5

Thanks for the article!

I attempted to add a helper method to convert the options before passing, still no luck. I’d really like to stay away from setting these values to hashes.

def mutable_arrray(attribute)
attribute.map { |value| value }
end

I’m surprised this behavior doesn’t come up more often when using built in resources (i.e. path attribute for execute resource).

Curtis

On Mar 11, 2014, at 5:39 PM, Noah Kantrowitz <noah@coderanger.netmailto:noah@coderanger.net> wrote:

You are probably running in to the merge behavior of arrays in node attributes. Check out https://coderanger.net/2013/06/arrays-and-chef/ for more info.

–Noah

On Mar 11, 2014, at 3:35 PM, “Stewart, Curtis” <cstewart@momentumsi.commailto:cstewart@momentumsi.com> wrote:

Attribute Sample:

node[‘servers’][‘main’][‘external_addresses’] = %w { 33.33.33.33 }

Recipe Context:

node[’servers’].each do |name, options|
server name do
external_addresses options[‘external_addresses’]
end
end

Then, if I update that attribute value to, say %w{ 33.33.33.30 }, the resource loads with both addresses.

Curtis

On Mar 11, 2014, at 5:20 PM, Noah Kantrowitz <noah@coderanger.netmailto:noah@coderanger.net> wrote:

Can you give an example of how you are using it?

–Noah

On Mar 11, 2014, at 3:19 PM, “Stewart, Curtis” <cstewart@momentumsi.commailto:cstewart@momentumsi.com> wrote:

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis

6

If you want sane deep merge semantics, you have to not use arrays. Otherwise just ensure only ever set things once and you should be fine.

--Noah

On Mar 11, 2014, at 4:14 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

Thanks for the article!

I attempted to add a helper method to convert the options before passing, still no luck. I’d really like to stay away from setting these values to hashes.

def mutable_arrray(attribute)
attribute.map { |value| value }
end

I’m surprised this behavior doesn’t come up more often when using built in resources (i.e. path attribute for execute resource).

Curtis

On Mar 11, 2014, at 5:39 PM, Noah Kantrowitz noah@coderanger.net wrote:

You are probably running in to the merge behavior of arrays in node attributes. Check out Arrays and Chef Attributes – Noah Kantrowitz for more info.

--Noah

On Mar 11, 2014, at 3:35 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

Attribute Sample:

node[‘servers’][‘main’][‘external_addresses’] = %w { 33.33.33.33 }

Recipe Context:

node[’servers'].each do |name, options|
server name do
external_addresses options['external_addresses']
end
end

Then, if I update that attribute value to, say %w{ 33.33.33.30 }, the resource loads with both addresses.

Curtis

On Mar 11, 2014, at 5:20 PM, Noah Kantrowitz noah@coderanger.net wrote:

Can you give an example of how you are using it?

--Noah

On Mar 11, 2014, at 3:19 PM, "Stewart, Curtis" cstewart@momentumsi.com wrote:

I’m working with a custom HWRP, and I have an attribute of type Array.

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

def external_addresses(arg = nil)
set_or_return(:external_addresses, arg, :kind_of => Array)
end

Thanks for any feedback,
Curtis