Ryth Azhur
3aafec6dd4
The IR called them react-message and django-message, so a FastAPI channel had to declare a DjangoMessage. They are client-message and server-message now, and the direction words hold wherever a channel is declared: Params / ClientMessage / ServerMessage, with mizan-core deriving <Pascal>Params and friends so no backend names a type itself. Django's ReactChannel and FastAPI's ReactChannel are both Channel. mizan-fastapi never registered a channels extension, so build_ir() emitted no channel at all and every payload type was invisible to codegen. It registers one now. RegistryExtension is an ABC requiring all(), which is what the IR reads — an extension that cannot enumerate its registrations no longer exists. The gate that should have caught the rename could not: tests/afi registered no channel because mizan-rust had no channel registry to register one in, so a five-package rename of the wire contract passed byte-parity without a channel byte crossing it. mizan-rust grows ChannelSlotKind, a CHANNELS slice, a #[mizan::channel] macro, and KDL emission whose wire_to_pascal matches Python's split; the AFI fixture now carries a channel with every slot and one with a single slot, so all three backends prove the contract byte for byte. MizanChannel held three Option<String> beside three has_*() predicates and unwrapped them with defaults; it holds an ordered slot vector, so an absent slot is absent rather than defaulted. The channels target emitted a React hooks file that a stage1-only consumer could not compile — react emits that now. The codegen's parity tests byte-compared emitted source against baselines without ever compiling it: they compile the generated crate and run its tests, import the generated Python package and call every method, and typecheck each TypeScript target against a consumer. Also fixed at source: app_visitor printed its import diagnostic to stdout, the stream export_mizan_ir writes KDL to, so a failed import silently corrupted the IR; the apps root was hardcoded to "apps"; _default_literal crashed build_ir on any non-JSON-serializable field default; Django and mizan-core derived Pascal names two different ways, disagreeing on every dotted channel name. ir.py builds a document and renders templates/ir/document.kdl.j2 rather than appending KDL strings with hand-tracked indentation, and named types resolve to a fixed point — a model reachable only through a union branch was referenced by a ref that no type block ever defined. The rest is the write-gate's own classifiers run over the standing tree: relative imports, silent swallows, Protocol contracts that should be ABCs, emitters hand-rendering target source, catch-all arms over closed enums, and comments narrating the project rather than the code. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
"""FastAPI test app that registers the AFI fixture."""
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from __future__ import annotations
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from fastapi import FastAPI
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from mizan_fastapi import (
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Channel,
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MizanError,
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mizan_exception_handler,
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mizan_validation_handler,
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register_channel,
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router as mizan_router,
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)
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from fixture import (
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CHAT_CHANNEL,
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USER_ALERTS_CHANNEL,
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ChatClientMessage,
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ChatParams,
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ChatServerMessage,
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UserAlertsServerMessage,
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register_fixture,
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)
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class ChatChannel(Channel):
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"""All three slots declared; the room keys the fan-out."""
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Params = ChatParams
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ClientMessage = ChatClientMessage
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ServerMessage = ChatServerMessage
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def group(self, params: ChatParams | None = None) -> str:
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return f"chat:{params.room_id}" if params else "chat"
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class UserAlertsChannel(Channel):
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"""Push-only: no params, nothing travels up."""
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ServerMessage = UserAlertsServerMessage
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def make_app() -> FastAPI:
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"""Build a fresh FastAPI app with the AFI fixture registered."""
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register_fixture()
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register_channel(ChatChannel, CHAT_CHANNEL)
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register_channel(UserAlertsChannel, USER_ALERTS_CHANNEL)
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app = FastAPI()
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app.include_router(mizan_router, prefix="/api/mizan")
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app.add_exception_handler(MizanError, mizan_exception_handler)
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from fastapi.exceptions import RequestValidationError
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app.add_exception_handler(RequestValidationError, mizan_validation_handler)
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return app
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