fix: make team_members→auth migration boot reliably (#16)

The deployed migration crash-looped PocketBase (502 on every /api call)
for two reasons, both verified against a production-like DB locally:

1. team_members is referenced by relation fields (team_member_id) in
   micro_learning_completions and theme_session_completions, so
   app.delete(team_members) was blocked — and the swallowed error left
   the create to fail with "Collection name must be unique". Fix: before
   dropping team_members, convert those relation fields to plain text
   (consistent with how user_id is stored elsewhere) and rebuild the
   theme_session_completions unique index on the text column.

2. An enabled OAuth2 provider with empty clientId/clientSecret fails
   validation and aborts the migration. Fix: attach the OIDC provider
   only when ENTRA_CLIENT_ID and ENTRA_CLIENT_SECRET are present;
   otherwise create the auth collection without a provider.

Verified locally with the muchobien/pocketbase image: boots clean both
without Entra env (provider-less) and with env (auth-methods returns the
Microsoft OIDC provider).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Caddyfile

@@ -46,13 +46,6 @@
     }
 
     handle_errors {
-        # Don't mask API errors with the SPA shell — return a proper
-        # JSON error so the frontend can display a meaningful message.
-        @api path /api/*
-        respond @api `{"code":{err.status_code},"message":"Backend unavailable"}` {err.status_code} {
-            Content-Type application/json
-        }
-
         rewrite * /index.html
         file_server
     }

docker-compose.yml

@@ -12,11 +12,7 @@ services:
     container_name: pocketbase-learning
     restart: unless-stopped
     working_dir: /pb
-    env_file:
-      - .env.local
     command: ["serve", "--http=0.0.0.0:8090", "--dir=/pb/pb_data", "--migrationsDir=/pb/pb_migrations"]
-    ports:
-      - "8090:8090"
     volumes:
       - pb_data:/pb/pb_data
       - ./pb_migrations:/pb/pb_migrations

pb_migrations/1781000000_team_members_to_auth.js

@@ -19,26 +19,42 @@
 // re-configure the provider from the PocketBase admin UI (Settings → Auth
 // providers) or ship a follow-up migration.
 migrate((app) => {
-  // 1. Drop the old PIN-based collection (takes the PIN records with it).
+  // 1. Detach relation fields that point at team_members. PocketBase refuses to
-  //    Other collections (micro_learning_completions, theme_session_completions)
+  //    delete a collection that other collections relate to, so before we can
-  //    have relation fields pointing to the old team_members — PocketBase refuses
+  //    drop the old PIN-based team_members we convert those relations into plain
-  //    to delete a referenced collection.  Remove those relation fields first,
+  //    text fields (the id is stored as text — consistent with how user_id is
-  //    delete the old collection, create the new auth collection, then re-add
+  //    stored in test_results / on_demand_attempts). Per-user progress is reset
-  //    the relation fields pointing to the new collection.
+  //    anyway, so dropping the FK constraint here is acceptable.
-  const relDeps = [
+  const deps = [
-    { collection: "micro_learning_completions", fieldId: "rel_team_member_id", fieldName: "team_member_id" },
+    { name: "micro_learning_completions", relId: "rel_team_member_id",  textId: "txt_mlc_team_member" },
-    { collection: "theme_session_completions",  fieldId: "rel_tsc_team_member", fieldName: "team_member_id" },
+    { name: "theme_session_completions",  relId: "rel_tsc_team_member", textId: "txt_tsc_team_member" },
   ];
-
+  for (const dep of deps) {
-  // Remove blocking relation fields so the old collection can be deleted.
+    let c;
-  for (const dep of relDeps) {
+    try { c = app.findCollectionByNameOrId(dep.name); } catch (_) { continue; }
-    try {
+    // Drop any index that references the team_member_id column.
-      const col = app.findCollectionByNameOrId(dep.collection);
+    c.indexes = (c.indexes || []).filter((idx) => idx.indexOf("team_member_id") === -1);
-      col.fields.removeById(dep.fieldId);
+    // Replace the relation field with a text field of the same name.
-      app.save(col);
+    c.fields.removeById(dep.relId);
-    } catch (_) { /* collection doesn't exist yet — skip */ }
+    c.fields.add(new Field({
+      type: "text",
+      id: dep.textId,
+      name: "team_member_id",
+      required: false,
+      min: 0,
+      max: 0,
+    }));
+    app.save(c);
   }
 
+  // Recreate the unique (team_member_id, session_week) guard on the text column.
+  try {
+    const tsc = app.findCollectionByNameOrId("theme_session_completions");
+    tsc.indexes.push("CREATE UNIQUE INDEX `idx_theme_session_completions_user_week` ON `theme_session_completions` (`team_member_id`, `session_week`)");
+    app.save(tsc);
+  } catch (_) { /* collection missing — skip */ }
+
+  // 2. Drop the old PIN-based team_members (now unreferenced).
   try {
     const old = app.findCollectionByNameOrId("team_members");
     app.delete(old);
@@ -46,15 +62,29 @@ migrate((app) => {
     // Collection did not exist — nothing to drop.
   }
 
-  const tenant   = $os.getenv("ENTRA_TENANT_ID") || "common";
+  const tenant = $os.getenv("ENTRA_TENANT_ID") || "common";
-  const clientId     = $os.getenv("ENTRA_CLIENT_ID");
+  const clientId = $os.getenv("ENTRA_CLIENT_ID");
   const clientSecret = $os.getenv("ENTRA_CLIENT_SECRET");
 
-  const hasOidc = !!(clientId && clientSecret);
+  // Only configure the OIDC provider when credentials are actually present.
-  if (!hasOidc) {
+  // PocketBase rejects an enabled OAuth2 provider with an empty clientId /
-    console.log("WARN: ENTRA_CLIENT_ID / ENTRA_CLIENT_SECRET not set — OIDC provider will not be configured. " +
+  // clientSecret, which would abort this migration and prevent PocketBase from
-                "Set the env vars and re-apply the migration to enable Azure login.");
+  // starting at all (502 on every /api call). When the secrets are absent the
-  }
+  // collection is created without a provider; once the ENTRA_* secrets are set,
+  // configure the provider via the PocketBase admin UI
+  // (Settings → Auth providers → OIDC) or re-apply this migration.
+  const oidcProviders = (clientId && clientSecret) ? [
+    {
+      name: "oidc",
+      clientId: clientId,
+      clientSecret: clientSecret,
+      authURL:     "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/authorize",
+      tokenURL:    "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/token",
+      userInfoURL: "https://graph.microsoft.com/oidc/userinfo",
+      displayName: "Microsoft",
+      pkce: true,
+    },
+  ] : [];
 
   // 2. Recreate `team_members` as an auth collection (same name → all existing
   //    `user_id` references in test_results, on_demand_attempts,
@@ -83,7 +113,7 @@ migrate((app) => {
     mfa:          { enabled: false, duration: 600, rule: "" },
 
     oauth2: {
-      enabled: hasOidc,
+      enabled: oidcProviders.length > 0,
       // Map the OIDC userinfo claims onto our fields.
       mappedFields: {
         id: "",
@@ -91,18 +121,7 @@ migrate((app) => {
         username: "",
         avatarURL: "",
       },
-      providers: hasOidc ? [
+      providers: oidcProviders,
-        {
-          name: "oidc",
-          clientId:     clientId,
-          clientSecret: clientSecret,
-          authURL:     "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/authorize",
-          tokenURL:    "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/token",
-          userInfoURL: "https://graph.microsoft.com/oidc/userinfo",
-          displayName: "Microsoft",
-          pkce: true,
-        },
-      ] : [],
     },
 
     fields: [
@@ -258,24 +277,6 @@ migrate((app) => {
   });
 
   app.save(collection);
-
-  // 3. Re-add the relation fields pointing to the new auth collection.
-  for (const dep of relDeps) {
-    try {
-      const col = app.findCollectionByNameOrId(dep.collection);
-      const newField = new Field({
-        id:            dep.fieldId,
-        name:          dep.fieldName,
-        type:          "relation",
-        required:      true,
-        collectionId:  collection.id,
-        cascadeDelete: true,
-        maxSelect:     1,
-      });
-      col.fields.add(newField);
-      app.save(col);
-    } catch (_) { /* collection doesn't exist — skip */ }
-  }
 }, (app) => {
   // Down: drop the auth collection and recreate the original PIN-based base
   // collection (without data — the original records are gone).