random hex string in erb template

[tobias...@gmail.com]

I want to create a random hex string in the format

041f798-a5f

inclusive the dash in a XML file.

I have tried using a self written shell script which generates the string with

<hid><%= exec('/var/somedir/somescript') %></hid>

in the template. That unfortunately didn't work.

I suspect I have to write a small embedded ruby template / code snipplet to generate this structure but after some web search I still have no idea how to do that in Embedded Ruby. Does somebody have a short erb suggestion?

[Peter Kristolaitis]

<% range = [*'0'..'9',*'A'..'Z',*'a'..'z'] -%>
<hid><%= Array.new(7){range.sample}.join + "-" + Array.new(3){range.sample}.join %></hid>

The "<% range ... -%>" can be anywhere in your template as long as it's before where you generate the random value.  I usually put stuff like that near the top of the template.  If you're generating multiple random values you only need to specify it once.

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[Peter Kristolaitis]

Just realized my code is slightly wrong for you since you wanted hex values rather than alphanumeric string.

The first line should be:

<% range = [*'0'..'9',*'a'..'f'] -%>

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[tobias...@gmail.com]

Works great. Thanks.