#4031: Patch to help prevent stale domain status saves [dg] #4191

DaisyGuti · 2025-09-17T18:39:13Z

Ticket

Resolves #4031

Added optimistic locking for the saves
If you try to save an old version of the domain now you get a message, "A newer version of this form exists. Please try again." And the page is refreshed with the latest version from the db.

Context for reviewers

Chat on Slack.

Example of the message you'll see:

Setup

Open two windows or tabs and login/: https://getgov-dg.app.cloud.gov/requests/
Select a domain request to Edit and open the same step in both windows/tabs
Edit it one window and save
Edit it in the other window and save, it should not save and you should see the message "A newer version of this form exists. Please try again." and the page should refresh with the latest save (from the other tab/window)

The same should occur if you try to save from Admin.

Code Review Verification Steps

As the original developer, I have

Satisfied acceptance criteria and met development standards

Met the acceptance criteria, or will meet them in a subsequent PR
Created/modified automated tests
Update documentation in READMEs and/or onboarding guide

Ensured code standards are met (Original Developer)

If any updated dependencies on Pipfile, also update dependencies in requirements.txt.
Interactions with external systems are wrapped in try/except
Error handling exists for unusual or missing values

Validated user-facing changes (if applicable)

Follow the process for requesting a design review. If code is not user-facing, delete design reviewer checklist
Verify new pages have been added to .pa11yci file so that they will be tested with our automated accessibility testing
Checked keyboard navigability
Tested general usability, landmarks, page header structure, and links with a screen reader (such as Voiceover or ANDI)

As a code reviewer, I have

Reviewed, tested, and left feedback about the changes

Pulled this branch locally and tested it
Verified code meets all checks above. Address any checks that are not satisfied
Reviewed this code and left comments. Indicate if comments must be addressed before code is merged
Checked that all code is adequately covered by tests
Verify migrations are valid and do not conflict with existing migrations

Validated user-facing changes as a developer

Note: Multiple code reviewers can share the checklists above, a second reviewer should not make a duplicate checklist. All checks should be checked before approving, even those labeled N/A.

New pages have been added to .pa11yci file so that they will be tested with our automated accessibility testing
Checked keyboard navigability
Meets all designs and user flows provided by design/product
Tested general usability, landmarks, page header structure, and links with a screen reader (such as Voiceover or ANDI)
(Rarely needed) Tested as both an analyst and applicant user

As a designer reviewer, I have

Verified that the changes match the design intention

Checked that the design translated visually
Checked behavior. Comment any found issues or broken flows.
Checked different states (empty, one, some, error)
Checked for landmarks, page heading structure, and links

Validated user-facing changes as a designer

Checked keyboard navigability
Tested general usability, landmarks, page header structure, and links with a screen reader (such as Voiceover or ANDI)
Tested with multiple browsers (check off which ones were used)
- Chrome
- Microsoft Edge
- FireFox
- Safari
(Rarely needed) Tested as both an analyst and applicant user

References

Code review best practices