I have a question about templates and the correct syntax.
I have an array which contains the following data:
“name1”,"description of name1"
“name2”,“description of name2”
…
“nameN”,“description of nameN”
This array needs to be stored as an attribute of a role or node (so
that it can be overridden)
I assume it could look something like this:
“host”:[[“name1”,“description of name1”],[“name2”,“description of name2”]]
Now the problem (at least for me) is how do I specify this in the template?
I have tried this (I assume it does not work because it needs to have
a object and not array):
<% @host.each do |h| %>
<%= host[0] %> <%= host[1]%>
<% end %>
if I write something like this
<% for h in @hosts %>
<%= h[0] %> <%= h[1]%>
<% end %>
the I get render_template': undefined methodkeys’ for
#Array:0x2b099b406648 (Chef::Mixin::Template::TemplateError)
So my question is, how can I use arrays in templates and store their
values in a role or node attribute?
Can you show me an example of this?
I'm no ruby expert, but It's worth pointing out that ordering of a Hash is
undefined. So the array-in-array approach works well if you intend to have
exact order in and out... which you likely do.
Perhaps someone with more ruby knowledge can demonstrate a ordered hash.
~ Sig
On Thu, Jul 29, 2010 at 3:51 PM, Adam Jacob adam@opscode.com wrote:
On Wed, Jul 28, 2010 at 4:50 AM, FX lists@bgp.lv wrote:
Hi,
I have a question about templates and the correct syntax.
I have an array which contains the following data:
"name1","description of name1"
"name2","description of name2"
...
"nameN","description of nameN"
This array needs to be stored as an attribute of a role or node (so
that it can be overridden)
I assume it could look something like this:
"host":[["name1","description of name1"],["name2","description of
name2"]]
This should be a hash, not an array - you have a "name" value, which
should be the key, and the descirption is a value.
Now the problem (at least for me) is how do I specify this in the
template?
I have tried this (I assume it does not work because it needs to have
a object and not array):
<% @host.each do |h| %>
<%= host[0] %> <%= host[1]%>
<% end %>
This is the right syntax - you need to have <%= h[0] %> and <%= h[1]
%>, since that's the variable you create on iteration.
Adam
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com
I'm no ruby expert, but It's worth pointing out that ordering of a Hash is
undefined. So the array-in-array approach works well if you intend to have
exact order in and out... which you likely do.
Perhaps someone with more ruby knowledge can demonstrate a ordered hash.
~ Sig
On Thu, Jul 29, 2010 at 3:51 PM, Adam Jacob adam@opscode.com wrote:
On Wed, Jul 28, 2010 at 4:50 AM, FX lists@bgp.lv wrote:
Hi,
I have a question about templates and the correct syntax.
I have an array which contains the following data:
"name1","description of name1"
"name2","description of name2"
...
"nameN","description of nameN"
This array needs to be stored as an attribute of a role or node (so
that it can be overridden)
I assume it could look something like this:
"host":[["name1","description of name1"],["name2","description of
name2"]]
This should be a hash, not an array - you have a "name" value, which
should be the key, and the descirption is a value.
Now the problem (at least for me) is how do I specify this in the
template?
I have tried this (I assume it does not work because it needs to have
a object and not array):
<% @host.each do |h| %>
<%= host[0] %> <%= host[1]%>
<% end %>
This is the right syntax - you need to have <%= h[0] %> and <%= h[1]
%>, since that's the variable you create on iteration.
Adam
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com
I'm no ruby expert, but It's worth pointing out that ordering of a Hash is
undefined. So the array-in-array approach works well if you intend to have
exact order in and out... which you likely do.
Perhaps someone with more ruby knowledge can demonstrate a ordered hash.
~ Sig
On Thu, Jul 29, 2010 at 3:51 PM, Adam Jacob adam@opscode.com wrote:
On Wed, Jul 28, 2010 at 4:50 AM, FX lists@bgp.lv wrote:
Hi,
I have a question about templates and the correct syntax.
I have an array which contains the following data:
"name1","description of name1"
"name2","description of name2"
...
"nameN","description of nameN"
This array needs to be stored as an attribute of a role or node (so
that it can be overridden)
I assume it could look something like this:
"host":[["name1","description of name1"],["name2","description of
name2"]]
This should be a hash, not an array - you have a "name" value, which
should be the key, and the descirption is a value.
Now the problem (at least for me) is how do I specify this in the
template?
I have tried this (I assume it does not work because it needs to have
a object and not array):
<% @host.each do |h| %>
<%= host[0] %> <%= host[1]%>
<% end %>
This is the right syntax - you need to have <%= h[0] %> and <%= h[1]
%>, since that's the variable you create on iteration.
Adam
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com
--
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com
I'm no ruby expert, but It's worth pointing out that ordering of a Hash is
undefined. So the array-in-array approach works well if you intend to have
exact order in and out... which you likely do.
Perhaps someone with more ruby knowledge can demonstrate a ordered hash.
~ Sig
On Thu, Jul 29, 2010 at 3:51 PM, Adam Jacob adam@opscode.com wrote:
On Wed, Jul 28, 2010 at 4:50 AM, FX lists@bgp.lv wrote:
Hi,
I have a question about templates and the correct syntax.
I have an array which contains the following data:
"name1","description of name1"
"name2","description of name2"
...
"nameN","description of nameN"
This array needs to be stored as an attribute of a role or node (so
that it can be overridden)
I assume it could look something like this:
"host":[["name1","description of name1"],["name2","description of
name2"]]
This should be a hash, not an array - you have a "name" value, which
should be the key, and the descirption is a value.
Now the problem (at least for me) is how do I specify this in the
template?
I have tried this (I assume it does not work because it needs to have
a object and not array):
<% @host.each do |h| %>
<%= host[0] %> <%= host[1]%>
<% end %>
This is the right syntax - you need to have <%= h[0] %> and <%= h[1]
%>, since that's the variable you create on iteration.
Adam
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com
--
Opscode, Inc.
Adam Jacob, CTO
T: (206) 508-7449 E: adam@opscode.com