Question

I have to generate a unique and random string which is to be stored in database. For doing this I have used the “uuidtools” gem. Then in my controller I have added the following line:

require "uuidtools"

and then in my controllers create method I have declared a ‘temp’ variable and generating a unique and random ‘uuid’ string like this:

temp=UUIDTools::UUID.random_create

which is creating a string like this one:

f58b1019-77b0-4d44-a389-b402bb3e6d50

Now my problem is I have to make it short, preferably within 8-10 character. Now how do I do it?? Is it possible to pass any argument to make it a desirable length string??

Thanks in Advance…

Answer 1

You don’t need uuidtools for this. You can use Secure Random for this.

[1] pry(main)> require "securerandom"
=> true
[2] pry(main)> SecureRandom.hex(20)
=> "82db4d707c4c5db3ebfc349da09c991b7ca0faa1"
[3] pry(main)> SecureRandom.base64(20)
=> "CECjUqNvPBaq0o4OuPy8RvsEoCY="

Passing 4 and 5 to hex will generate 8 and 10 character hex strings respectively.

[5] pry(main)> SecureRandom.hex(4)
=> "a937ec91"
[6] pry(main)> SecureRandom.hex(5)
=> "98605bb20a"