> Is this even possible? I've got a ruby expression stored in a
> database, it's the code to run a plugin since I was having trouble
> passing variables stored in the database.
In my opinion it would be better to solve the original problem you had
with the plugin and passing variables than to use dynamically executed
code as a workaround. From your snippets I'd guess the problem is you
are trying to save/pass a string like "Gbarcode::BARCODE_128" into the
plugin rather than the underlying value referred to by the constant
Thank's for the response Michael and Robby, here's my response before
I saw what Michael wrote:
This smells funny... so I wanted to ask for more information. How is
the ruby code going to be added into the database? Would users be
inputting ruby code somehow?
Well, it's a workaround to another problem I'm running into. I'm
trying to use the barcode-generator plugin (http://code.google.com/p/
barcode-generator/), which is based on the gbarcode gem.
In my database I have two tables, one for the numbers, and one for the
types of codes
to use the plugin, you call <%= barcode 'UPCCODE' %> in the view, and
it generates the code to create and display the PNG. My problem is
that I'm trying to add the :encoding_function option to the code,
which would look something like this:
<%= barcode 'UPCCODE', :encoding_function => Gbarcode::BARCODE_ISBN %>
I need to be able to dynamically input the encoding function like
<%= barcode code.number, :encoding_function => code.type.upctype %>
but this pops up errors.
I've tried every combination of trying to pass that value, and it
always fails. So, as a last resort, I wrote code to just write the
whole line to the database for each UPCnumber, i.e.:
<%= barcode 'TEST1234', :encoding_function => Gbarcode::BARCODE_39 %>
<%= barcode '234567890987', :encoding_function =>
<%= barcode 'U567890298322E', :encoding_function =>
But, as I said above, when I try to pull this code, and run it to
generate and display the barcode, it fails.
code: <%= barcode card.cardnumber, :encoding_format =>
result: in method 'Barcode_Encode', argument 2 of type 'int'
code: <%= barcode card.cardnumber, card.rewards.upctype %>
code.type.upctype: :encoding_format => Gbarcode::BARCODE_ISBN
result: index 94105 out of string