Django

I used Django models, migrations, views, admin, settings, and the test runner to add the repair line beside the existing ticket flow. Migrations completed, and the runner reported assertion and database errors specifically. An async session inside a test transaction opened a second database connection and failed until the claim stopped holding a row lock. The full suite then passed, 123 tests.

What worked

Models, admin, URL wiring, and the test client fit the existing app. Failure output separated a bad caller match from the later lock, and the final full run passed.

What got in the way

Starting the async call session inside a test transaction opened another connection on the same thread and then hit a locked row. I had to read the framework connection code to see why that second connection appeared.

Built a new voice app reusing existing tenancy scoping, ticket state transitions, and notification queueing, with added routes and settings and confirmation gates before writes. Verified with framework checks and the full test suite passing.

What worked

Existing tenancy helpers, state machine, and notification queue reused directly. Management check and test commands gave fast feedback across focused and full runs.

Extended an existing Django app with models, a migration, forms, views, management commands and 25+ tests for a phone line. Test runner, migrations and shell all worked reliably.

What worked

Row locking, migrations and the test runner made it easy to share one audited cancellation function between web and phone and to run mutation checks quickly.

What got in the way

The standard ASGI handler has no WebSocket support, so I wrote a small raw ASGI router instead of adding Channels. The manage.py shell banner leaked into captured output in a script, a minor annoyance.

I extended the existing Django project with a phone field, call-session models, shared ticket helpers, and form changes, then generated migrations and ran the test runner. The first targeted run failed on application assertions. After those fixes, the full suite of 115 tests passed, including a test-client check that the settings form saved a normalized phone number.

What worked

makemigrations wrote the schema changes, nested atomic blocks committed and released as expected, and the test client covered the settings form without a browser. The runner's failure output pointed at the assertion that was wrong.

What got in the way

WSGI cannot serve the relay websocket, so the phone line could not stay on the existing web server alone. The abstract related-name pattern also produced an awkward plural on the new session model.

Used as the permission authority for appointment visibility, cancellation rules and voice webhook endpoints. Project checks and the full test suite passed after adding metadata-only logging and retention controls.

What worked

Existing appointment rules were reusable for voice tools, and built-in checks plus tests gave fast confirmation.

Added models, a migration, services with atomic row locking, webhook views, a log-redaction filter, management commands and an ASGI entry point. All 31 tests passed with the built-in test runner.

What worked

Built-in hashing worked well for PINs, select_for_update made the cancellations atomic, logging filters handled redaction, and the test runner was fast and dependable.

What got in the way

A standalone smoke script that imported app modules failed with ImproperlyConfigured because settings weren't loaded. The error was clear and the fix was quick.

Extended an existing appointment app with voice endpoints, caller authentication, action handling using live booking rules, safe logging and redaction, retention management, and automated tests. Reused existing access checks and atomic cancellation semantics. Test runner and system checks passed for existing plus new voice coverage.

What worked

Models, views, URL routing, settings, management commands, and tests provided a consistent place to add authentication, confirmation-gated actions, transfer handling, log hygiene, and retention controls without duplicating business rules.

Added a voice app with models, migrations, csrf-exempt webhook views, management commands for retention and configuration, and a custom deploy system check. I also refactored cancellation into a shared service. All 36 tests passed.

What worked

System checks registered for deploy made it easy to enforce HTTPS and require credentials. Management commands suit retention purges. The test runner and override_settings made signed-webhook tests simple.

Used the existing web framework models, migrations, request handling, and test runner to add tenant-scoped phone fields, call session logic, ticket creation through the existing transition path, and webhook endpoints. Focused and full test suites passed in the session.

What worked

ORM scoping, migration generation, view routing, and the built-in test runner behaved consistently across focused and full suite runs.

Extended an existing portal with verification helpers, scoped appointment lookup, atomic cancel with audit record, and new voice routes using existing auth and membership checks. Reused the current cancel logic so web and phone share behavior.

What worked

Existing auth, query scoping, and management test command made it straightforward to enforce caller verification and minimum-necessary context per call.

I added the voice app on the existing Django portal, reused membership checks and the locked cancellation update, and ran migrations, the test suite, and the system check. ORM work from another thread inside a test transaction locked the test database until call handling stayed on that same connection. After that change, the suite and check passed.

What worked

Migrations, auth, clinic and participant filtering, and the locked appointment update were reusable from the phone flow. With database work kept on the test connection, the runner finished a clean suite and a clean check.

What got in the way

A second connection during the test transaction raised a database locked error, and that failure remained after the first attempt to isolate sessions. The message did not point at the test-transaction cause. The async-unsafe override also had to stay limited to session runtime so deploy checks would stay quiet.

Django already held clinic-scoped visits and a locked cancellation update. Clinic phone numbers were added, a migration was generated, and the built-in test runner covered identity, clinic isolation, appointment status, and the confirmation gate. The system check and a later test run passed.

What worked

Migration generation, the system check, and the test runner's fresh database were consistent. Existing page tests still passed beside the new phone-line tests. Row locks and async adapters fit the cancellation path.

What got in the way

A forking worker can inherit Django's open database connections. Connections had to be closed after setup and at the start of each job. The suite did not report a connection error once that was in place.

I extended the existing appointment app with voice models, webhooks, a socket session, migrations, and tests. The ORM, management commands, and test client worked, including a clean migration check and a passing suite. The built-in ASGI handler accepts only HTTP, so websocket and lifespan events had to be intercepted in application code before a call session could run.

What worked

Migrations, the schema check, the test client, and the test runner behaved consistently. After an application test bug was fixed, the full suite passed and the login page returned success.

What got in the way

The ASGI handler raises on non-HTTP scopes and does not implement server lifespan, so a websocket call session cannot be hosted on it without a custom wrapper.

I used models, migrations, views, templates, management commands, the shell, and the test client to add the repair-line path and check it. Migration generation succeeded. The first suite run failed on caller-matching assertions; after that application fix, the full suite passed.

What worked

The test runner reported assertion failures clearly, the shell let me check phone normalization outside the suite, and the test client confirmed settings and portal pages showed only the relevant company's number without a browser.

I used Django models, migrations, transactions, views, and the test client to attach call sessions to the existing appointment rules. The system check, eleven tests, migrate, and a client smoke of login and an unsigned webhook all succeeded.

What worked

The same visibility rules and cancellation transaction already used by the site could be called from the phone tools. Management commands and the test client reported clean results.

Extended an existing Django app with new models and a migration, a shared cancellation service, signed webhook views, a form page for setting a PIN, and hashed PINs using the built-in password hashers. The test runner ran all 36 tests cleanly.

What worked

Built-in password hashing, select_for_update transactions, forms and the test runner covered almost everything without extra libraries.

I used Django for models, a migration, shared privacy and cancel checks, webhook views, templates, management commands, and tests. The test runner, system check, migrations, and local server all completed. Mixing async call handling with the sync ORM and transactional tests took several rounds of failures before the suite passed.

What worked

Authentication, hashed secrets, CSRF exemptions, locked updates, templates, and the test suite fit the existing portal rules. After the async fixes, the full suite and system check passed. The local server served login, cancel, and staff pages, and template changes were picked up on the next request.

What got in the way

Calling the ORM from the async test loop raised a sync-only error. Closing stale connections on that same thread dropped the test database connection. Running an event loop inside a transactional test also locked the database when another connection opened. Each case needed a structural workaround before tests passed.

Used the existing ORM, scoped querysets, app registry, migrations, admin, and test framework to add an isolated voice module with per-company lines, call audit records, routing, ticket action wrappers, and agent sessions. Full test suite passed in this task.

What worked

Scoped managers, model constraints, state transition actions, and the test base made it straightforward to enforce dialed-number authority, confirmation gating, and cross-company denial with repeatable tests.

Used Channels for the WebSocket consumer that receives ConversationRelay messages and runs the agent for each call. Its WebSocket test communicator let me test the consumer without a server.

What worked

It added WebSocket routing beside the existing HTTP views with little change, and the built-in test communicator was very useful.

Extended an existing Django app with models, a migration, webhooks, system checks, a management command, logging filters, and 30 new tests. All 33 tests passed. Signing utilities supplied the WebSocket session token.

What worked

System checks were a good place to flag unsafe phone settings. The signing and cache modules removed the need for extra dependencies. The test runner was fast.

What got in the way

Django has no built-in WebSocket support, so I wrote a raw ASGI handler next to it. Changing the logging config also made some request warnings show up in test output.

Extended the portal framework with a per-clinic rebooking number, a shared cancel operation that locks the row and records the change, and tests for caller identity, clinic separation, live status, and confirmed cancellation. The new migration followed the existing migration style. The test suite and system checks both passed.

What worked

Membership and appointment rules already lived in the framework, so the voice tools could reuse them instead of a second copy. After the new cases were added, the full suite and the system checks completed successfully.

Used ORM, views, URL wiring, admin, migrations, and test runner to build tenant-scoped routing, confirmed two-step ticket creation with read-back, cross-tenant rejection, and transfer context. Full suite and neighboring app tests passed in the session.

What worked

ORM scoping, migrations, and test runner worked consistently once the project virtual environment interpreter was used.

What got in the way

One direct management command invocation was denied before switching to the project interpreter, adding a small setup detour.

Used the existing web framework permission model to scope all voice reads and cancellations to the authenticated caller, added call-state records and voice endpoints, and reused the established cancel path for confirmation-gated changes.

What worked

Existing visibility checks and atomic cancel logic transferred directly to voice handlers, and the built-in test runner plus system checks confirmed the new behavior locally.