Ryth Azhur
7fb0c4a400
The @client(merge=[context, ...]) decorator lets a mutation patch its
return value directly into the cached context bundle by matching the
mutation's Output type against each context-function's Output type
to identify the slot, then splicing server-side. Kernel runs
splice_slot on the response to apply locally — no refetch, no
invalidate-cascade.
Lands H14, H15, H16, M19, M20 from ISSUES.md.
Backends (Django + FastAPI):
_resolve_merges() in both executors walks @client(merge=...) targets,
resolves the per-context slot via types_match_for_merge, and emits
{context, slot, value, params?} entries on the response. Param
auto-scoping mirrors _resolve_invalidation's tier-1 logic.
Frontend kernel (mizan-base):
Response handler reads the merge[] array and applies splice_slot
for each entry — locates the cached context bundle by name+params,
overwrites the named slot with the new value, notifies subscribers.
Core (mizan-python):
@client decorator extended with merge= parameter. Schema export
threads merge metadata onto the OpenAPI x-mizan-functions entries.
Examples / fixtures:
fastapi-react-site harness exercises merge + Playwright spec covers
the end-to-end happy path (mutation → instant UI update without
network refetch). AFI fixture's rename_user function is the
canonical merge target.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
109 lines
3.2 KiB
Python
109 lines
3.2 KiB
Python
"""
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The AFI fixture — a small set of @client-decorated functions designed to
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exercise the protocol axes both backends must agree on:
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- plain function with typed input
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- plain function with no input
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- two context functions sharing a param (proves bundling + param elevation)
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- a mutation declaring `affects` on the context
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No channels, no forms, no shapes — those aren't AFI-common.
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`register_fixture()` registers the functions with mizan_core.registry.
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Backend test apps import this module and call register_fixture() during
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their setup so each backend's schema export sees the same registrations.
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"""
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from __future__ import annotations
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from pydantic import BaseModel
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from mizan_core.client.function import client
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from mizan_core.registry import register
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# ─── Output shapes ──────────────────────────────────────────────────────────
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class EchoOutput(BaseModel):
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message: str
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class WhoamiOutput(BaseModel):
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email: str
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authenticated: bool
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class ProfileOutput(BaseModel):
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user_id: int
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name: str
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class OrderOutput(BaseModel):
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id: int
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user_id: int
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total: int
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class StatusOutput(BaseModel):
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ok: bool
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# ─── Fixture functions ──────────────────────────────────────────────────────
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@client
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def echo(request, text: str) -> EchoOutput:
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"""Echoes the input back."""
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return EchoOutput(message=f"echo: {text}")
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@client
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def whoami(request) -> WhoamiOutput:
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"""Returns the current user identity."""
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return WhoamiOutput(email="anon@example.com", authenticated=False)
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@client(context="user")
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def user_profile(request, user_id: int) -> ProfileOutput:
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"""One half of the user context."""
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return ProfileOutput(user_id=user_id, name="placeholder")
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@client(context="user")
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def user_orders(request, user_id: int) -> list[OrderOutput]:
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"""Other half of the user context — same param, proves param elevation."""
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return []
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@client(affects="user")
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def update_profile(request, user_id: int, name: str) -> StatusOutput:
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"""Mutation declaring affects on the user context."""
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return StatusOutput(ok=True)
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@client
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def find_user(request, user_id: int) -> ProfileOutput | None:
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"""Optional return — exercises Pydantic `T | None` schema introspection."""
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return None
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@client(merge="user")
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def rename_user(request, user_id: int, name: str) -> ProfileOutput:
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"""Merge target — kernel splices return value into the user context."""
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return ProfileOutput(user_id=user_id, name=name)
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# ─── Registration ───────────────────────────────────────────────────────────
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def register_fixture() -> None:
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"""Register every fixture function with mizan_core.registry."""
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register(echo, "echo")
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register(whoami, "whoami")
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register(user_profile, "user_profile")
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register(user_orders, "user_orders")
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register(update_profile, "update_profile")
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register(find_user, "find_user")
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register(rename_user, "rename_user")
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