From 09c8ef194654e3add0779304d2c7afa41902d343 Mon Sep 17 00:00:00 2001
From: Konsti Wohlwend <n2d4xc@gmail.com>
Date: Tue, 30 Jun 2026 10:43:10 -0700
Subject: [PATCH] Keep local emulator removal in a new migration, not edits to
 applied ones (#1694)

---
 .../tests/cascades-on-project-delete.ts       | 30 +++++++++++++
 .../tests/persists-and-enforces-uniqueness.ts | 44 +++++++++++++++++++
 .../migration.sql                             |  7 +++
 .../tests/default-and-updates.ts              | 18 +++++++-
 4 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/cascades-on-project-delete.ts
 create mode 100644 apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/persists-and-enforces-uniqueness.ts

diff --git a/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/cascades-on-project-delete.ts b/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/cascades-on-project-delete.ts
new file mode 100644
index 000000000..76a0434a7
--- /dev/null
+++ b/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/cascades-on-project-delete.ts
@@ -0,0 +1,30 @@
+import { randomUUID } from "crypto";
+import type { Sql } from "postgres";
+import { expect } from "vitest";
+
+export const preMigration = async (sql: Sql) => {
+  const projectId = `test-${randomUUID()}`;
+  await sql`
+    INSERT INTO "Project" ("id", "createdAt", "updatedAt", "displayName", "description", "isProductionMode")
+    VALUES (${projectId}, NOW(), NOW(), 'Cascade Test Project', '', false)
+  `;
+  return { projectId };
+};
+
+export const postMigration = async (sql: Sql, ctx: Awaited<ReturnType<typeof preMigration>>) => {
+  const absoluteFilePath = `/tmp/${randomUUID()}/stack.config.ts`;
+
+  await sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${absoluteFilePath}, ${ctx.projectId}, NOW(), NOW())
+  `;
+
+  await sql`DELETE FROM "Project" WHERE "id" = ${ctx.projectId}`;
+
+  const rows = await sql`
+    SELECT "absoluteFilePath"
+    FROM "LocalEmulatorProject"
+    WHERE "absoluteFilePath" = ${absoluteFilePath}
+  `;
+  expect(rows).toHaveLength(0);
+};
diff --git a/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/persists-and-enforces-uniqueness.ts b/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/persists-and-enforces-uniqueness.ts
new file mode 100644
index 000000000..6d27834d7
--- /dev/null
+++ b/apps/backend/prisma/migrations/20260226100000_add_local_emulator_project_mapping/tests/persists-and-enforces-uniqueness.ts
@@ -0,0 +1,44 @@
+import { randomUUID } from "crypto";
+import type { Sql } from "postgres";
+import { expect } from "vitest";
+
+export const preMigration = async (sql: Sql) => {
+  const projectId1 = `test-${randomUUID()}`;
+  const projectId2 = `test-${randomUUID()}`;
+
+  await sql`
+    INSERT INTO "Project" ("id", "createdAt", "updatedAt", "displayName", "description", "isProductionMode")
+    VALUES (${projectId1}, NOW(), NOW(), 'Local Emulator Project 1', '', false)
+  `;
+  await sql`
+    INSERT INTO "Project" ("id", "createdAt", "updatedAt", "displayName", "description", "isProductionMode")
+    VALUES (${projectId2}, NOW(), NOW(), 'Local Emulator Project 2', '', false)
+  `;
+
+  return { projectId1, projectId2 };
+};
+
+export const postMigration = async (sql: Sql, ctx: Awaited<ReturnType<typeof preMigration>>) => {
+  const path1 = `/tmp/${randomUUID()}/stack.config.ts`;
+  const path2 = `/tmp/${randomUUID()}/stack.config.ts`;
+
+  await sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${path1}, ${ctx.projectId1}, NOW(), NOW())
+  `;
+
+  await expect(sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${path1}, ${ctx.projectId2}, NOW(), NOW())
+  `).rejects.toThrow(/LocalEmulatorProject_pkey/);
+
+  await expect(sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${path2}, ${ctx.projectId1}, NOW(), NOW())
+  `).rejects.toThrow(/LocalEmulatorProject_projectId_key/);
+
+  await sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${path2}, ${ctx.projectId2}, NOW(), NOW())
+  `;
+};
diff --git a/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/migration.sql b/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/migration.sql
index 2540282eb..d2ba1c650 100644
--- a/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/migration.sql
+++ b/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/migration.sql
@@ -1,2 +1,9 @@
 ALTER TABLE "Project"
 ADD COLUMN "isDevelopmentEnvironment" BOOLEAN NOT NULL DEFAULT false;
+
+UPDATE "Project"
+SET "isDevelopmentEnvironment" = true
+WHERE "id" IN (
+  SELECT "projectId"
+  FROM "LocalEmulatorProject"
+);
diff --git a/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/tests/default-and-updates.ts b/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/tests/default-and-updates.ts
index 2c299c18c..b8f8d641b 100644
--- a/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/tests/default-and-updates.ts
+++ b/apps/backend/prisma/migrations/20260513000000_add_project_development_environment/tests/default-and-updates.ts
@@ -4,11 +4,20 @@ import { expect } from "vitest";
 
 export const preMigration = async (sql: Sql) => {
   const projectId = `test-${randomUUID()}`;
+  const localEmulatorProjectId = `test-${randomUUID()}`;
   await sql`
     INSERT INTO "Project" ("id", "createdAt", "updatedAt", "displayName", "description", "isProductionMode")
     VALUES (${projectId}, NOW(), NOW(), 'Development Environment Flag Project', '', false)
   `;
-  return { projectId };
+  await sql`
+    INSERT INTO "Project" ("id", "createdAt", "updatedAt", "displayName", "description", "isProductionMode")
+    VALUES (${localEmulatorProjectId}, NOW(), NOW(), 'Existing Local Emulator Project', '', false)
+  `;
+  await sql`
+    INSERT INTO "LocalEmulatorProject" ("absoluteFilePath", "projectId", "createdAt", "updatedAt")
+    VALUES (${`/tmp/${randomUUID()}/stack.config.ts`}, ${localEmulatorProjectId}, NOW(), NOW())
+  `;
+  return { projectId, localEmulatorProjectId };
 };
 
 export const postMigration = async (sql: Sql, ctx: Awaited<ReturnType<typeof preMigration>>) => {
@@ -20,4 +29,11 @@ export const postMigration = async (sql: Sql, ctx: Awaited<ReturnType<typeof pre
   expect(rows).toHaveLength(1);
   expect(rows[0].isDevelopmentEnvironment).toBe(false);
 
+  const localEmulatorRows = await sql`
+    SELECT "isDevelopmentEnvironment"
+    FROM "Project"
+    WHERE "id" = ${ctx.localEmulatorProjectId}
+  `;
+  expect(localEmulatorRows).toHaveLength(1);
+  expect(localEmulatorRows[0].isDevelopmentEnvironment).toBe(true);
 };