dba8fc607145669a05c19c2aa03fca5262c00a4d
2 Commits
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b96637e1a1 |
Let a baseline meet a table that is already there
Reported: `flask plugin upgrade-all` failed the tools plugin with "table securesendsecrets already exists". Every post-cutover baseline emitted a plain op.create_table. That is correct only while a table's existence and its plugin's Alembic stamp can never disagree, and they can. Anything that builds tables from the models - db.create_all(), which `flask db-utils create-all` calls - creates them and stamps nothing. A run that creates a table and then fails before its stamp commits leaves the same split, and re-running is the obvious thing to try. In both cases upgrade-all meets existing tables with an unstamped chain and the create is fatal. Nothing caught it because the migration test DROPS the post-cutover tables db.create_all() built before running upgrade-all. That arranges the one state where an unguarded create works, and never the state the report came from. The new test is the same sequence with the drop removed for the plugin under test. create_table_if_missing and create_index_if_missing are in alembic_template.py next to create_plugin_tables, which had the idempotency rule right and turns out to be called by nobody - its docstring claimed every 0001 used it. Fixed the docstring rather than rewiring the baselines onto it, because the reason they hand-write their DDL still stands: the helper's per-plugin MetaData cannot resolve a foreign key to a core table at CreateTable-compile time. INDEXES ARE MATCHED ON COLUMNS, NOT NAME, and that distinction matters. The two creators disagree about names - db.create_all() takes SQLAlchemy's default convention (ix_securesendsecrets_token) and a baseline spells it the way this repo's naming rules require (ixsecuresendsecretstoken). A name-keyed guard would have called the index missing and added a second one over the same column, which MySQL permits with a warning, so every affected site would have quietly grown duplicates. The test asserts no table ends up with two indexes over the same columns. Applied to all nine table-creating plugin migrations, not just the tools baseline that was reported: the four later migrations that create tables have the same exposure, and geenforce, measuringtools, printedparts and backups are the same defect waiting for a different site. WHAT THIS DOES NOT FIX. It makes a baseline idempotent, not a whole chain. A longer chain can still meet an ALTER whose column is already present - printedparts adding gagelabtag to a table create_all built at head is the case that showed up while testing. Guarding every op one at a time is the wrong answer to that; a database built from the models is already AT head and its chains want stamping rather than replaying, and there is no `flask plugin stamp` today. Left alone deliberately rather than half-built, and the new test is scoped to single-baseline plugins so it does not pretend otherwise. |
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2d09fa3201 |
Collect what bays actually have, separately from what they are told to have
ShopDB knew what a bay SHOULD have and nothing about what it DOES. Adding the observed half makes a rollout a review instead of a typing exercise: the floor reports itself in, you look, and you adopt. The collection uses the mechanism that already exists rather than a new one. POST /api/collector/printers dispatches to the printers plugin's apply_collector_payload, the same ADR-006 hook the computers and backups plugins implement. New client script, new plugin-owned table, no new transport and no new credential. OBSERVED AND ASSIGNED STAY APART, and that is the point rather than a detail. A collector report can never write an assignment row: _reconcile_edges is the only function that writes usesprinter/defaultprinter, it has two call sites, and both are authenticated routes a human calls. If a drifted bay's own state were allowed to become what it is told to install, every configuration error would become permanent the next time that PC checked in. Seeding an assignment from observed state is explicit - POST /assignments/seed-from-observed - because a rollout adopts many machines at once. It routes through the same _reconcile_edges as the editor, so there is one write path with two doors, and a queue matching no known printer is REFUSED rather than guessed into an assignment. That last rule is the lesson from the measuring tools: adopting on a weak key produced 43 duplicate instruments. Two fixes on top of what the agents built. The replace deleted a host's previous rows by exact case-folded name while the read path treats a short name and its FQDN as one machine, so a PC that changed spelling appeared to hold every queue twice - which reads as drift that is not there. And the client sent 'reportedat' where the declared schema said 'observedat'. Also here: the legacy loader now imports machines.printerid, the classic system's record of each machine's default printer, which it silently dropped - the production import would have lost every one. And Set-ShopdbPrinters.ps1 finally registers the per-user logon task, staging Apply-ShopdbDefaultPrinter.ps1 to C:\ProgramData first because the share it lives on is mounted only during the enforcement cycle and the task runs at logon when it is gone. VALIDATED ON WINDOWS 11 (build 26200), not just on Linux pwsh, which parses these scripts happily and executes none of the spooler branches. The reporter: posts a correct payload with the X-API-Key header; resolves BaseUrl and CollectorKey from HKLM when given no arguments; suppresses the virtual queues by port; resolves port addresses; and reads the CONSOLE USER's default out of HKU rather than SYSTEM's own, which is a different and usually wrong answer. Two results matter more than the rest. With the spooler stopped, both the cmdlet and the CIM path fail and the script posts NOTHING - verified against a capture server that recorded zero requests, where an empty list would instead have erased that host's observed rows and read as a bay that lost its printers. A genuinely empty host still posts [], because that is a real and different fact. The logon task registers as the Users group at Limited, and falls back to the well-known SID S-1-5-32-545 when the group name will not resolve, as it will not on localised Windows. It was then run with the source directory RENAMED AWAY, to stand in for the share being unmounted, and it still moved the user's default - which is the whole reason the script is staged to C:\ProgramData rather than run from where it lives. The guarantees against damage were re-checked rather than assumed: an empty assignment changes nothing, an unreachable server changes nothing, -WhatIfOnly leaves no queue, no task, no staged file and no registry value behind, and a drifted queue is repointed IN PLACE with Set-Printer so whoever has it as their default keeps it. Not covered by any of this: the driver-staging path, which needs a real vendor package rather than the class drivers a VM ships with. |