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Works fine for me in the script/console:

>> User.current.name
=> "Anonymous" 
>> User.find(3).name
=> "Felix Schäfer"

What error are you getting specifically? What does the trace in the logs show?

To tell the truth, I don't know as I'm a newbie in Ruby (I've been using it for only a week). The only thing I know is that this code doesn't return nil, I checked it by if statement.
Here is the piece of code I'm working on:
user = User.find(3)
if user.name
val = user.name # also tried user.name.to_s
elsif val = "not found!" #val gets assigned by "not found!"
end
cv2 = CustomValue.new :custom_field_id => cv.custom_field_id, :customized_id => cv.customized_id, :value => val, :customized_type => cv.customized_type
The problem is that new field wouldn't be created. When I put some random string value into val, it works fine. Do you have any ideas what can be the problem?
Could you please tell how can I know what errors I get and how to look at the trace in the logs?

P.S. Tried to google it, but everything I managed to find was some modules to debug ruby. Could you please give me a link to a tutorial or something like that?

Thanks in advance!