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feat: add doccano-django sample (keploy postgres-v3 simple-Query bind regression)
Minimum reproducer for the polymorphic-resourcetype failure that motivated keploy/integrations#177. Wraps doccano v1.8.5 + django-rest-polymorphic + postgres 13.3-alpine — the same shape the bug originally surfaced on (keploy/enterprise PRs #1889 / #1964, pipelines 3556 / 3572). Per the keploy-ci-debug skill, the sample owns ALL orchestration the lane scripts in keploy/integrations and keploy/enterprise need: the docker-compose, the admin-bootstrap flow, the API traffic loop, the noise filter (via keploy.yml.template), and a coverage-report helper. Future lanes that exercise the same backend re-use this directory; they don't redefine compose / bootstrap / traffic in their own scripts. The intent is to migrate enterprise/.ci/scripts/doccano-linux.sh from its current ~400-line inlined-everything shape down to a thin "clone sample → wrap in keploy → assert" wrapper in a follow-up PR. Layout: * `Dockerfile` — `FROM doccano/doccano:backend`. Wrapper exists so a future doccano patch (or a backport of an upstream fix that changes the bug-triggering shape) is a one-line edit here, not scattered across lane scripts. * `docker-compose.yml` — postgres + doccano backend on a fixed subnet, every name fully env-driven (DOCCANO_BACKEND_CONTAINER / DOCCANO_DB_CONTAINER / DOCCANO_APP_PORT / DOCCANO_DB_IP / DOCCANO_NETWORK_SUBNET). Lane scripts running multiple matrix cells in parallel pass per-cell values so the cells don't collide on container names. Two-phase boot (DOCCANO_SKIP_BOOTSTRAP=0 → migrations + admin; named volume retained; DOCCANO_SKIP_BOOTSTRAP=1 → gunicorn-only against the populated volume) so record/replay see a deterministic state. * `flow.sh` — four subcommands: bootstrap — log in as admin, install the deterministic authtoken_token row so record-time and replay-time Authorization headers match. record-traffic — drive the API: 16-call /v1/me warmup hammer (gunicorn worker contenttypes-cache warmup, necessary for the SIGINT-driven shutdown pattern lanes use), POST a polymorphic TextClassificationProject, GET / PATCH it, plus dependent category-types / examples / categories / metrics reads that exercise the multi-bind django_content_type lookups the fix targets. Fire-and-forget; keploy is the assertion layer at replay. coverage — walk the running backend's URL resolver (introspecting actual served methods, not Django's permissive http_method_names default) and the just-recorded keploy/test-set-* tests; emit a (method, path) coverage percentage for the v1/projects + accessory surface. list-routes — print the route table the coverage report uses as its denominator (diagnostic). * `keploy.yml.template` — globalNoise filter for the inherently non-deterministic fields (Date/Expires headers, created_at/ updated_at body fields). Centralised here so a future doccano version that adds another auto-timestamp field is one edit rather than a fan-out across lane scripts. Lane scripts envsubst this template into the per-cell run dir. * `README.md` — bug shape, local-run instructions, lane pointers. Sample is keploy-independent: `docker compose up && bash flow.sh bootstrap && bash flow.sh record-traffic` works against bare doccano. Verified locally: 25/25 calls return expected status, polymorphic resourcetype is `TextClassificationProject` end-to-end. The route walker emits 144 (method, path) pairs for the v1/projects + /v1/me + /v1/users + /v1/health + /v1/auth surface; coverage matching against synthetic recorded tests rounds correctly. Lanes that pin to this sample (pinned to the feat/doccano-django-sample branch via --branch until this PR merges): * keploy/integrations `.woodpecker/doccano-postgres.yml` — three-way matrix (record-build × replay-build, record-latest × replay-build, record-build × replay-latest); depends_on prepare-and-run. * keploy/enterprise `.woodpecker/doccano-linux.yml` — being migrated to consume this sample in a follow-up PR; today still uses inline compose generation. Signed-off-by: Akash Kumar <meakash7902@gmail.com>
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‎doccano-django/Dockerfile‎

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# Thin wrapper around doccano's official backend image at the version
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# this sample tracks. Pinning here (rather than in each lane script
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# under keploy/integrations / keploy/enterprise) means a future
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# doccano release that changes the bug-triggering shape is a one-line
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# retag in this repo, not a hunt across the CI tree.
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#
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# Upstream tag: doccano/doccano:backend (the rolling backend tag)
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# Source pin: doccano/doccano @ v1.8.5
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# https://github.com/doccano/doccano/releases/tag/v1.8.5
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#
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# v1.8.5 was the version exercised on keploy/enterprise pipeline 3556
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# (PR #1889) and pipeline 3572 (PR #1964 minimal repro) where the
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# bug originally manifested.
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FROM doccano/doccano:backend

‎doccano-django/README.md‎

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# doccano-django — keploy postgres-v3 simple-Query bind regression sample
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Minimal reproducer for the doccano polymorphic-resourcetype failure
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that motivated [keploy/integrations#177](https://github.com/keploy/integrations/pull/177)
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("fix(postgres-v3): extract simple-Query literals into bindValues").
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The sample wraps doccano (Django + django-rest-polymorphic + psycopg2)
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at version `v1.8.5` against postgres `13.3-alpine`. The shape under
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test: a polymorphic Django model (`Project` with subclass
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`TextClassificationProject`) created over the REST API and re-read via
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DRF's polymorphic queryset. Without the integrations fix, every
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`SELECT … FROM django_content_type WHERE app_label = $1 AND model = $2`
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at replay returns the same recorded mock (the matcher's
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`pickSessionFallback` FIFO-collapses every variant onto the first
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recording when the bind signature is empty), so the polymorphic
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serializer can't resolve the project's subclass and `resourcetype`
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flips from `"TextClassificationProject"` to `"Project"`.
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The bug is in keploy's recorder + replayer simple-Query path; doccano
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is just a vehicle. Same pattern would reproduce on any Django app
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that:
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* Uses a polymorphic ORM (django-polymorphic / django-rest-polymorphic).
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* Sends parameterised reads via psycopg2's simple-Query mode
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(literals interpolated into the SQL text rather than carried in a
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separate Bind packet).
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* Exercises the polymorphic queryset across multiple HTTP requests
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against the same recorded backend.
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## What's in here
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* `Dockerfile` — thin wrapper around `doccano/doccano:backend` pinning
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the upstream version this sample tracks. Future doccano releases
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that change the bug-triggering shape are addressed by retagging
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here, not by scattering version pins across the lane scripts in
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`keploy/integrations` / `keploy/enterprise`.
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* `docker-compose.yml` — the orchestration: postgres-13 alongside
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the doccano backend, on a fixed subnet so the lane scripts can
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rely on stable IPs across record/replay phases.
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* `flow.sh` — the minimum reproducer traffic, ~10 HTTP calls. POST
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`/v1/projects` (creates a `TextClassificationProject`), then GET
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list / GET single / PATCH single / a few dependent reads. The
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GET / PATCH responses are what diverge under the bug — POST
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passes either way because the in-memory subclass instance shapes
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the response without consulting the DB.
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* `keploy.yml.template` — keploy config skeleton (proxy port, DNS
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port, container name placeholders) that lane scripts in
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`keploy/integrations` and `keploy/enterprise` `envsubst` into a
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per-job copy.
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## Running locally
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```sh
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# Bring doccano up + bootstrap the admin token (one-shot; the volume
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# is reused for the actual record run).
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docker compose up -d
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./flow.sh bootstrap
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# Record
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keploy record \
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-c "docker compose up" \
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--container-name doccano_backend \
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--proxy-port 18081 --dns-port 18082
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# (in another shell, while keploy record is up)
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./flow.sh record-traffic
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# → SIGINT keploy when traffic returns
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# Replay
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keploy test \
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-c "docker compose up" \
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--containerName doccano_backend \
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--apiTimeout 60 --delay 20 \
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--proxy-port 18081 --dns-port 18082
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```
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Expected outcome with the integrations fix in place: 0 failures,
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all `is_text_project: true` / `resourcetype: "TextClassificationProject"`
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across the project-read responses.
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Expected outcome **without** the fix: tests covering GET-after-POST
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project reads fail with `is_text_project: true → false` and
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`resourcetype: "TextClassificationProject" → "Project"`.
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## CI lanes that consume this sample
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* `keploy/integrations` — `.woodpecker/doccano-postgres.yml` /
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`.ci/scripts/python/doccano/doccano-linux.sh`. Three-way matrix
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(record-build × replay-build, record-latest × replay-build,
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record-build × replay-latest) — the cross-binary cells stay red
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until both keploy releases pick up the bind-extraction fix.
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* `keploy/enterprise` — `.woodpecker/doccano-linux.yml` /
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`.ci/scripts/doccano-linux.sh`. Same three-way matrix wired to
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the enterprise compat-matrix harness.
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Both clone this directory at the branch / tag pinned by the
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respective lane script.
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## Related
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* [keploy/integrations#177](https://github.com/keploy/integrations/pull/177) — the fix this sample falsifies.
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* [keploy/enterprise#1889](https://github.com/keploy/enterprise/pull/1889) — original failing PR where the bug surfaced.
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* [django-rest-polymorphic](https://github.com/apirobot/django-rest-polymorphic) — the upstream library whose serialisation path the bug breaks.

‎doccano-django/docker-compose.yml‎

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# doccano-django sample compose. Postgres + doccano backend on a
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# fixed subnet so the lane scripts in keploy/integrations and
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# keploy/enterprise can pin the DB IP without runtime discovery.
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#
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# Two-phase boot pattern (used by the lane scripts but valid for
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# local runs too):
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#
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# 1. DOCCANO_SKIP_BOOTSTRAP=0 → backend runs migrations, creates
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# the admin user, sets the auth token; once that returns we
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# `compose down` the stack but keep the named volume so the
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# DB state persists.
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# 2. DOCCANO_SKIP_BOOTSTRAP=1 → backend re-launches in
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# gunicorn-only mode against the populated volume; recording /
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# replay run against this incarnation.
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#
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# The split is what gives the lane a deterministic DB starting state
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# without paying the migration cost on every record/replay invocation.
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services:
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backend:
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build:
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context: .
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dockerfile: Dockerfile
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# Every name is env-driven so multiple matrix cells can run in
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# parallel on the same docker daemon without colliding. Lane
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# scripts that spin up doccano per-cell pass cell-scoped values
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# (e.g. DOCCANO_BACKEND_CONTAINER=doccano_backend_<cell-slug>).
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# Local single-runs use the shorter defaults.
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container_name: ${DOCCANO_BACKEND_CONTAINER:-doccano_backend}
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init: true
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stop_grace_period: 5s
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ports:
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- "${DOCCANO_APP_PORT:-18080}:8000"
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environment:
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ADMIN_USERNAME: ${DOCCANO_ADMIN_USER:-admin}
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ADMIN_PASSWORD: ${DOCCANO_ADMIN_PASSWORD:-password}
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ADMIN_EMAIL: ${DOCCANO_ADMIN_EMAIL:-admin@example.com}
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DATABASE_URL: postgres://doccano:doccano@${DOCCANO_DB_IP:-172.34.0.10}:5432/doccano?sslmode=disable
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ALLOW_SIGNUP: "False"
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DEBUG: "False"
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DJANGO_SETTINGS_MODULE: config.settings.production
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DOCCANO_SKIP_BOOTSTRAP: "${DOCCANO_SKIP_BOOTSTRAP:-0}"
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depends_on:
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postgres:
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condition: service_healthy
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networks:
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- doccano-net
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postgres:
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image: postgres:13.3-alpine
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container_name: ${DOCCANO_DB_CONTAINER:-doccano_db}
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stop_grace_period: 5s
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environment:
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POSTGRES_USER: doccano
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POSTGRES_PASSWORD: doccano
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POSTGRES_DB: doccano
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healthcheck:
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test: ["CMD-SHELL", "pg_isready -U doccano -d doccano"]
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interval: 5s
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timeout: 5s
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retries: 20
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volumes:
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- doccano-db-data:/var/lib/postgresql/data
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networks:
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doccano-net:
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ipv4_address: ${DOCCANO_DB_IP:-172.34.0.10}
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networks:
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doccano-net:
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driver: bridge
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ipam:
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config:
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- subnet: ${DOCCANO_NETWORK_SUBNET:-172.34.0.0/24}
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volumes:
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doccano-db-data:

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