Add expires_at option to signed_id

Problem:

Though, the `MessageVerifier` that powers `signed_id` supports both
`expires_in` and `expires_at`, `signed_id` only supports `expires_in`.
Because of this, generating signed_id that expires at a certain time is
somewhat tedious. Imagine issuing a coupon that is valid only for a
day.

Solution:

Add `expires_at` option to `signed_id` to generate signed ids that
expire at the given time.

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Add `expires_in` option to `signed_id`.
+
+    *Shouichi Kamiya*
+
 *   Allow applications to set retry deadline for query retries.
 
     Building on the work done in #44576 and #44591, we extend the logic that automatically

activerecord/lib/active_record/signed_id.rb

@@ -109,8 +109,8 @@ def combine_signed_id_purposes(purpose)
     #
     # And you then change your +find_signed+ calls to require this new purpose. Any old signed ids that were not
     # created with the purpose will no longer find the record.
-    def signed_id(expires_in: nil, purpose: nil)
-      self.class.signed_id_verifier.generate id, expires_in: expires_in, purpose: self.class.combine_signed_id_purposes(purpose)
+    def signed_id(expires_in: nil, expires_at: nil, purpose: nil)
+      self.class.signed_id_verifier.generate id, expires_in: expires_in, expires_at: expires_at, purpose: self.class.combine_signed_id_purposes(purpose)
     end
   end
 end

activerecord/test/cases/signed_id_test.rb

@@ -67,11 +67,11 @@ class SignedIdTest < ActiveRecord::TestCase
     assert_nil Account.find_signed("this won't find anything")
   end
 
-  test "find signed record within expiration date" do
+  test "find signed record within expiration duration" do
     assert_equal @account, Account.find_signed(@account.signed_id(expires_in: 1.minute))
   end
 
-  test "fail to find signed record within expiration date" do
+  test "fail to find signed record within expiration duration" do
     signed_id = @account.signed_id(expires_in: 1.minute)
     travel 2.minutes
     assert_nil Account.find_signed(signed_id)
@@ -83,6 +83,16 @@ class SignedIdTest < ActiveRecord::TestCase
     assert_nil Account.find_signed signed_id
   end
 
+  test "find signed record within expiration time" do
+    assert_equal @account, Account.find_signed(@account.signed_id(expires_at: 1.minute.from_now))
+  end
+
+  test "fail to find signed record within expiration time" do
+    signed_id = @account.signed_id(expires_at: 1.minute.from_now)
+    travel 2.minutes
+    assert_nil Account.find_signed(signed_id)
+  end
+
   test "find signed record with purpose" do
     assert_equal @account, Account.find_signed(@account.signed_id(purpose: :v1), purpose: :v1)
   end
@@ -99,11 +109,11 @@ class SignedIdTest < ActiveRecord::TestCase
     end
   end
 
-  test "find signed record with a bang within expiration date" do
+  test "find signed record with a bang within expiration duration" do
     assert_equal @account, Account.find_signed!(@account.signed_id(expires_in: 1.minute))
   end
 
-  test "finding signed record outside expiration date raises on the bang" do
+  test "finding signed record outside expiration duration raises on the bang" do
     signed_id = @account.signed_id(expires_in: 1.minute)
     travel 2.minutes