🐛 Try to fix "Max client connections reached" errors transaction mode (#1669)

.devcontainer/devcontainer.json

@@ -13,7 +13,8 @@
   // Use 'forwardPorts' to make a list of ports inside the container available locally.
   "forwardPorts": [
     5173,
-    5432 // for postgres
+    5432, // for postgres
+    6543 // for postgres
   ],
   // "shutdownAction": "none",
   //

.github/workflows/ci.yml

@@ -94,6 +94,7 @@ jobs:
         run: pnpm dlx prisma migrate deploy
         env:
           DATABASE_URL: ${{ secrets.PREVIEW_DATABASE_URL }}
+          DIRECT_URL: ${{ secrets.PREVIEW_DIRECT_URL }}
 
       - name: Pull Vercel Environment Information
         run: pnpm vercel pull --yes --environment=preview --token=${{ secrets.VERCEL_TOKEN }}
@@ -140,6 +141,7 @@ jobs:
         run: pnpm dlx prisma migrate deploy
         env:
           DATABASE_URL: ${{ secrets.PRODUCTION_DATABASE_URL }}
+          DIRECT_URL: ${{ secrets.PRODUCTION_DIRECT_URL }}
 
       - name: Pull Vercel Environment Information
         run: pnpm vercel pull --yes --environment=production --token=${{ secrets.VERCEL_TOKEN }}

compose.yaml

@@ -2,14 +2,15 @@ services:
   web:
     build: .
     ports:
-      - 5173:5173
+      - '5173:5173'
     tty: true
     volumes:
       - .:/usr/src/app:cached
       - ./node_modules:/usr/src/app/node_modules:cached
     environment:
       - NODE_ENV=development
-      - DATABASE_URL=postgresql://db_user:db_password@db:5432/test_db
+      - DATABASE_URL=postgresql://db_user:db_password@db:5432/test_db?pgbouncer=true&connection_limit=10&connect_timeout=60&statement_timeout=60000 # Note: Local server cannot start if port is set to db:6543.
+      - DIRECT_URL=postgresql://db_user:db_password@db:5432/test_db
     command: sleep infinity
     depends_on:
       - db
@@ -25,7 +26,7 @@ services:
       POSTGRES_DB: test_db
       POSTGRES_INITDB_ARGS: '--encoding=UTF8'
     ports:
-      - 5432:5432
+      - '6543:5432'
 
 volumes:
   postgres-data:

prisma/schema.prisma

@@ -3,9 +3,11 @@
 
 // See:
 // https://www.prisma.io/docs/concepts/components/prisma-schema/generators
+// https://www.prisma.io/docs/orm/prisma-client/deployment/edge/deploy-to-vercel
 generator client {
-  provider      = "prisma-client-js"
-  binaryTargets = ["native", "rhel-openssl-3.0.x"]
+  provider        = "prisma-client-js"
+  binaryTargets   = ["native", "rhel-openssl-3.0.x"]
+  previewFeatures = ["driverAdapters"]
 }
 
 // See:
@@ -26,8 +28,9 @@ generator fabbrica {
 }
 
 datasource db {
-  provider = "postgresql"
-  url      = env("DATABASE_URL")
+  provider  = "postgresql"
+  url       = env("DATABASE_URL")
+  directUrl = env("DIRECT_URL")
 }
 
 // Note: Lucia v3 + v3 Prisma adaperでは、全てのフィールドがキャメルケースであることが要求されている。