v3 Migration Guide

scripts/migrate-better-auth.ts

@@ -0,0 +1,76 @@
+#!/usr/bin/env bun
+import { db } from "../src/lib/db";
+import { users, accounts } from "../src/lib/db/schema";
+import { eq } from "drizzle-orm";
+import bcrypt from "bcryptjs";
+
+console.log("🔄 Starting Better Auth migration...");
+
+async function migrateToBetterAuth() {
+  try {
+    // Check if migration is needed
+    const existingAccounts = await db.select().from(accounts).limit(1);
+    if (existingAccounts.length > 0) {
+      console.log("✓ Better Auth migration already completed");
+      return;
+    }
+
+    // Get all users with password hashes
+    const allUsers = await db.select().from(users);
+    
+    if (allUsers.length === 0) {
+      console.log("ℹ️  No users to migrate");
+      return;
+    }
+
+    console.log(`📊 Found ${allUsers.length} users to migrate`);
+
+    // Migrate each user
+    for (const user of allUsers) {
+      try {
+        // Skip users without passwords (shouldn't happen but be safe)
+        if (!user.password) {
+          console.log(`⚠️  Skipping user ${user.email} - no password hash found`);
+          continue;
+        }
+
+        // Create Better Auth account entry
+        await db.insert(accounts).values({
+          id: crypto.randomUUID(),
+          userId: user.id,
+          accountId: user.email, // Use email as account ID
+          providerId: "credential", // Better Auth credential provider
+          accessToken: null,
+          refreshToken: null,
+          expiresAt: null,
+          password: user.password, // Move password hash to accounts table
+          createdAt: new Date(),
+          updatedAt: new Date()
+        });
+
+        // Remove password from users table (Better Auth manages it now)
+        await db.update(users)
+          .set({ password: null })
+          .where(eq(users.id, user.id));
+
+        console.log(`✓ Migrated user: ${user.email}`);
+      } catch (error) {
+        console.error(`❌ Failed to migrate user ${user.email}:`, error);
+        // Continue with other users even if one fails
+      }
+    }
+
+    console.log("✅ Better Auth migration completed successfully");
+    
+    // Verify migration
+    const migratedAccounts = await db.select().from(accounts);
+    console.log(`📊 Total accounts after migration: ${migratedAccounts.length}`);
+    
+  } catch (error) {
+    console.error("❌ Better Auth migration failed:", error);
+    process.exit(1);
+  }
+}
+
+// Run migration
+migrateToBetterAuth();