Mx Pg Controller Migration

mx-core PG Cutover · Controller Verification & Downstream Sync

Repos in scope (paths assume worktree root)

No server-side back-compat shim. If a field rename is correct on PG, propagate it through SDK and dashboard. The user has explicitly opted out of legacy aliases.

Data completeness IS a bug. A migration that compiles but silently drops related, category, or any joined value is broken. Always cross-check what the old mongoose pipeline emitted against what the new repository emits.

Workflow (run in this order)

1 · Snapshot the migration delta

Identify the PG cutover commit for the module and diff against the last Mongo-era commit. The mx-core history convention:

# Last canonical pre-PG commit (refactor: comment module ...)
PRE_PG=58983aef
# PG cutover for content modules
PG_CUT=d5e582ba

git show $PRE_PG:apps/core/src/modules/<mod>/<mod>.controller.ts | head -200
git show $PRE_PG:apps/core/src/modules/<mod>/<mod>.model.ts
git log --oneline $PRE_PG..HEAD -- apps/core/src/modules/<mod>/

Look for: autopopulate, aggregate(...$lookup, $project), BaseModel/WriteBaseModel virtuals, count: { read, like }, pin, created, modified. Any of these are likely lossy after migration.

2 · Walk every endpoint

Read the controller end to end. For each route, ask:

1. Field names: does the response shape still include what the dashboard / front-end consumes? (See mapping table below.)
2. Joined data: did mongoose emit a category, related, topic, ref, … via populate/$lookup? If yes, does the new repository attach it? Use attach<Foo> helpers; never trust that the controller's (doc as any).related is populated — the repo is the source of truth.
3. Aggregate-pipeline order: old code often did $project (select) BEFORE $lookup, so $lookup-injected fields survived select filtering. The PG port frequently inverts that order and silently drops joined fields. Check select-style projections in the controller — they must whitelist or unconditionally preserve joined fields.
4. Dead JSON-string parsing: code like if (typeof doc.meta === 'string') doc.meta = JSON.safeParse(...) is dead under jsonb. Delete it.
5. Redundant aliases: related: body.relatedId as any style props that the service no longer reads. Delete.
6. Cross-cutting enums (DraftRefType, CollectionRefTypes, CommentRefType, RecentlyRefTypes): commit b9823fb6 unified ref_type to singular lowercase ('post' | 'note' | 'page' | 'recently'). The PG SQL UPDATE migrated existing rows. The dashboard's local enum copies still hold legacy plural/PascalCase values and MUST be re-checked when verifying any module that touches drafts, comments, recently, file-references or ai-translations.

3 · Field rename map (Mongo → PG, after snake-case → camel-case round-trip)

When in doubt, read apps/core/src/database/schema/*.ts — it is authoritative.

4 · Fix the server (apps/core)

Typical patches:

• Repository: extend <Mod>Row with optional joined fields (category?, related?); add a private attach<Foo>(rows) that does one batched query, never per-row N+1; wire it into findById / findBySlug / find<...> / list.
• Controller: when applying select whitelisting, force-include joined keys that are not addressable by the query string (selected.add('id'); selected.add('category')). Document why with a brief comment.
• Service / controller: drop redundant aliases; fold legacy input fields (created, pin) into their PG counterparts in the write path (the comment in post.service.ts after commit 536f1df9 is the reference pattern).

Run, scoped to the module:

pnpm -C apps/core exec tsc --noEmit
pnpm -C apps/core exec eslint src/modules/<mod>/

5 · Sync the SDK (packages/api-client)

The SDK type IS the contract. It must reflect the actual server payload after snake_case → camelCase.

For each renamed field:

1. Update models/<mod>.ts — usually means not extending the legacy TextBaseModel (which still has created/modified); flatten the model with PG names instead. Keep BaseModel/TextBaseModel untouched until the matching module is also being migrated, to avoid touching unrelated SDK types.
2. Grep for Pick<<Mod>Model, …> across the SDK — models/category.ts, models/aggregate.ts, controllers/<mod>.ts, controllers/search.ts — and rename the picked keys.
3. Update <Mod>ListOptions.sortBy literal unions in controllers/<mod>.ts to the PG names.

pnpm -C packages/api-client exec tsc --noEmit   # ignore the TS6.0 deprecation noise

6 · Sync the dashboard (admin-vue3)

The dashboard uses its own model copies under apps/admin/src/models/<mod>.ts (not the api-client types). Both must be updated.

1. Rewrite apps/admin/src/models/<mod>.ts and any cross-module Pick<...> (e.g. models/category.ts → PickedPostModelInCategoryChildren).
2. Update views under apps/admin/src/views/manage-<mod>/:
   • Table column keys (used by n-data-table's sorter)
   • select query strings sent to the server
   • All row.<oldField> reads → row.<newField> (search for row.created, row.modified, row.pin, row.count, commentsIndex, allowComment)
3. The reactive form state may keep boolean toggles (pin: boolean) — don't change the type, but in loadPublished map payload.pinAt → data.pin = !!payload.pinAt so the toggle still binds.
4. Components like <RelativeTime> require non-null time. For modifiedAt (nullable) use row.modifiedAt ?? row.createdAt.
5. Re-check ref-type enums. Dashboard ships its own copies — these are out of date:
   • apps/admin/src/models/draft.ts → DraftRefType was 'posts' | 'notes' | 'pages', must become 'post' | 'note' | 'page'.
   • apps/admin/src/models/recently.ts → RecentlyRefTypes was 'Post' | 'Note' | 'Page', must become 'post' | 'note' | 'page' | 'recently'.
   • Anywhere a controller verifies that touches drafts (post/note/page editor pages), recently, comments, or ai-translations: grep the dashboard for the enum, fix values, run typecheck — enum members keep the same names so call sites are unaffected.

cd /Users/innei/git/innei-repo/admin-vue3 && pnpm -C apps/admin run typecheck

(If pnpm version warnings appear, they're unrelated — only tsc errors matter.)

Checklist (run per module)

• Read <mod>.controller.ts, list every route
• git show <pre-pg>:.../<mod>.model.ts — note virtuals, populates, count shape
• For each route, list (field rename × joined-data × dead-code) issues
• Patch repository: add attach<Foo> + wire into all read paths
• Patch controller: preserve joined fields under select; drop dead JSON.safeParse(meta) and redundant aliases
• pnpm -C apps/core exec tsc --noEmit
• Update packages/api-client/models/<mod>.ts + cross-references in models/category.ts / models/aggregate.ts / controllers/{<mod>,search}.ts
• pnpm -C packages/api-client exec tsc --noEmit
• Update admin-vue3 models/<mod>.ts, models/category.ts, views/manage-<mod>/*
• If module touches drafts/comments/recently/file-references/ai-translations: re-verify dashboard ref-type enum values are singular lowercase
• pnpm -C apps/admin run typecheck (in admin-vue3 worktree)
• Eyeball the diff one more time: any row.created / row.pin / count?.read left?

Common bugs (caught while migrating PostController)

Red flags — STOP and re-check

• A controller method returns (doc as any).<something> — the cast is hiding a missing repo attachment.
• New repository method has await Promise.all(rows.map(r => this.attach<Foo>(r))) shape — that's N+1; switch to a batched attach<Foo>(rows: Row[]).
• You're tempted to add a "back-compat alias" on the server. Don't. The user has rejected this — propagate the rename downstream instead.
• You changed BaseModel / TextBaseModel in api-client to fix a single module. Don't — that affects every module that hasn't been migrated yet. Flatten the single model instead.
• A dashboard column's sorter key doesn't match a real PG field (e.g. key: 'count.read'). Sorting is broken — pick a real key ('readCount') or remove sortability.

Reference: tools used during PostController pass

# Find every consumer of a model in the dashboard
grep -rn "<Mod>Model\b" /Users/innei/git/innei-repo/admin-vue3/apps/admin/src --include="*.ts" --include="*.tsx" --include="*.vue"

# Find dashboard accesses to old fields scoped to one module's views
grep -rn "row\.created\|row\.modified\|row\.pin\b\|row\.count\." \
  /Users/innei/git/innei-repo/admin-vue3/apps/admin/src/views/manage-<mod> 2>/dev/null

# Reference fix commit for write-side input mapping (created→createdAt, pin→pinAt)
git show 536f1df9 -- apps/core/src/modules/post/post.service.ts