stapel-categories

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Category tree with typed features: a hierarchical category tree (django-treenode) and a parallel feature tree whose typed config is validated by stapel-attributes, an ordered category<->feature M2M, feature inheritance, and a feature-editor lifecycle (keep/add/edit/inherit/remove/create/replace) with optimistic-concurrency apply over a category subtree.

Part of the Stapel framework — composable Django apps that deploy as a monolith or as microservices without changing module code.

Install

pip install stapel-categories

At a glance

Fact Value
Version 0.18.0
Python >=3.11 (3.11, 3.12, 3.13, 3.14)
HTTP operations 33
Config axes 1
Usage surface 22
Extension points 4
Error codes 64
Fleet dependencies stapel-attributes · stapel-core

Documentation

OpenAPI · capabilities.json · llms.txt (for agents)

What this is

A hierarchical category tree (django-treenode) and a parallel feature tree whose typed config is validated by stapel-attributes. Categories own the tree structure, feature inheritance, the ordered category↔feature M2M, and the feature-editor lifecycle; the attribute engine (types, config/DTO/DAO validation, polymorphic serializers, admin widgets) lives in stapel-attributes and is imported, never re-implemented.

Quick start

INSTALLED_APPS = [
    # ...
    "treenode",            # django-treenode (tree-cache signals)
    "stapel_categories",
]

# urls.py — this module's own urls.py bakes in only `v1/`; the host
# contributes `api/`, giving the canonical `/categories/api/v1/...` prefix
# (exactly what stapel-example-monolith already does for this module).
path("categories/api/", include("stapel_categories.urls"))

stapel-attributes is an imported library (no app to install); its config editor ships static assets, so run collectstatic if you use the admin.

Settings

All configuration lives in the STAPEL_CATEGORIES namespace (dict setting, flat setting, or env var — resolved lazily):

Key Default Meaning
CAROUSEL_CACHE_TIMEOUT 300 Seconds the carousel response is cached.
FEATURE_DISPLAY_CACHE_TIMEOUT 60 Seconds an admin feature display label is memoized.
DISPLAY_TRANSLATOR stapel_categories.translation.identity_translator Dotted path (key)->str for rendering translation keys (default: identity).

comm surface

Kind Name Contract
Function categories.features {"category_id": int} -> {"category_id", "revision", "features":[{id,slug,name,mandatory,config}]} — resolved schema (own + inherited), cacheable by revision
Function categories.path {"category_ids": [int, ...]} -> {"<id>": ["<root_id>", ..., "<id>"]} — root->leaf ancestry, one query for the batch; segments are ids, an unknown id is absent
Action (emit) category.changed {"category_id": int, "revision": int} on any category/feature mutation — for downstream cache invalidation

categories.features lets stapel-listings validate attribute values against a category's schema without importing this module. categories.path is the provider stapel-search declares by canonical name for category rollup — without it a search index degrades to a single path segment and a filter on a parent category finds none of its descendants.

Contract

docs/{schema,flows,errors}.json are emitted from a single-module {categories + core} Django instance mounted at the canonical /categories/api/v1 prefix (make contract / make contract-check; see _codegen.py) — the same mechanism stapel-search, stapel-chat and stapel-forms already use. docs/flows.json is []: no flow is declared via @flow yet, same state as every other contract-complete module today. docs/capabilities.json stays hand-authored (see the Makefile comment); only its surface section is derived.

The ten feature-value shapes (FeatureConfig, FeatureDto) are a proper discriminated oneOf keyed by type, contributed by stapel-attributes and now used consistently everywhere a config or a values-DTO crosses the wire — Feature.config, FeatureBulk.config, the convert-type request body and validate-dto's features field all resolve through it (previously the last three fell back to an untyped JSONField/DictField).

Delta note — one pair of fields stays untyped, and it isn't this module's to fix. FeatureValidationResult.id / .ref_value render as free-form in the schema. Both are defined by stapel-attributes (FeatureValidationResult dataclass + its serializers.JSONField projection in results.py), not by this module: id is Optional[Union[int, str]] and ref_value is Optional[Union[str, int, float, list]] — plain scalar unions with no type discriminator to key a oneOf on, unlike the ten-way config/DTO shapes. Typing them is upstream's serializer to extend, not a gap stapel-categories introduced or can close by itself.

Extension points

See MODULE.md — the agent-facing map of every fork-free seam (settings, serializer seams, comm surface, feature-editor actions, admin-UI pointer to stapel-attributes).

Development

pip install -e . && pip install pytest pytest-django ruff
./setup-hooks.sh
pytest tests/

License

MIT — see LICENSE.

This page is assembled by stapel-readme from docs/readme.md plus the contract artifacts in docs/. Edit the prose in docs/readme.md; the badges, facts and links above and below it are generated — do not hand-edit README.md.

Project links

Data verified by PyPI on Sep 3, 2026
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Key dates

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  • Released:
Newer release available (0.20.5)

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GitHub Statistics

Data verified by PyPI on Sep 3, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python >=3.11

Provides Extra

all

Tags

django stapel categories

Classifiers

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