bug - global id is incorrect with multiple calls

[Anton Katunin]

The issue as it seems global id cached on the model and if it is called more than once with different params it returns wrong result.

Check this out

> User.find(1).to_sgid.to_s == User.find(1).to_sgid(for:'asd').to_s
  User Load (1.5ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  User Load (0.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
=> false

And compare to this:

> u = User.find(1)
  User Load (0.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
=> #<User:0x007febc9f74f38 ...>
> u.to_sgid.to_s == u.to_sgid(for:'asd').to_s
=> true

[Anton Katunin]

25cab12 commit broke that

[Kasper Timm Hansen]

That commit didn't break anything. At the time to_sgid could only generate the same id. A later commit introduced the options parameter, which made to_sgid able to generate different signed ids.

To determine if the caching is at all worth it, I've made a benchmark to test how slow the create call is:

require 'global_id'
require 'models/person'

require 'active_support/message_verifier'
require 'benchmark/ips'

person = Person.find(1)

GlobalID.app = 'bcx'
SignedGlobalID.verifier = ActiveSupport::MessageVerifier.new('muchSECRETsoHIDDEN')

Benchmark.ips do |x|
  x.report('gid creation') { GlobalID.create(person) }
  x.report('signed creation') { SignedGlobalID.create(person) }
end

which results in:

kaspth:globalid kasperhansen$ ruby -Ilib:test sgid-create-perf.rb
Calculating -------------------------------------
        gid creation   934.000  i/100ms
     signed creation   902.000  i/100ms
-------------------------------------------------
        gid creation     10.452k (± 4.2%) i/s -     52.304k
     signed creation     10.004k (± 4.7%) i/s -     50.512k

Which sounds like it can generate 10k signed ids per second, if I'm reading it right.

So I'm guessing we can do without the signed id cache. @jeremy, what do you think?