base44-coder（Base44 编码器）

Base44 Coder

Build apps on the Base44 platform using the Base44 JavaScript SDK.

Quick Start

// In Base44-generated apps (pre-configured)
import { base44 } from "@/api/base44Client";

// CRUD operations
const task = await base44.entities.Task.create({ title: "New task", status: "pending" });
const tasks = await base44.entities.Task.list();
await base44.entities.Task.update(task.id, { status: "done" });

// Get current user
const user = await base44.auth.me();

// External apps
import { createClient } from "@base44/sdk";

// IMPORTANT: Use 'appId' (NOT 'clientId' or 'id')
const base44 = createClient({ appId: "your-app-id" });
await base44.auth.loginViaEmailPassword("user@example.com", "password");

SDK Modules

For client setup and authentication modes, see client.md.

Creating a Client (External Apps)

When creating a client in external apps, ALWAYS use appId as the parameter name:

import { createClient } from "@base44/sdk";

// ✅ CORRECT
const base44 = createClient({ appId: "your-app-id" });

// ❌ WRONG - Do NOT use these:
// const base44 = createClient({ clientId: "your-app-id" });  // WRONG
// const base44 = createClient({ id: "your-app-id" });        // WRONG

Required parameter: appId (string) - Your Base44 application ID

Optional parameters:

• token (string) - Pre-authenticated user token
• options (object) - Configuration options

- options.onError (function) - Global error handler

Example with error handler:

const base44 = createClient({
  appId: "your-app-id",
  options: {
    onError: (error) => {
      console.error("Base44 error:", error);
    }
  }
});

Module Selection

Working with app data?

• Create/read/update/delete records → entities
• Import data from file → entities.importEntities()
• Realtime updates → entities.EntityName.subscribe()

User management?

• Login/register/logout → auth
• Get current user → auth.me()
• Update user profile → auth.updateMe()
• Invite users → users.inviteUser()

AI features?

• Chat with AI agents → agents
• Create new conversation → agents.createConversation()
• Manage conversations → agents.getConversations()

Custom backend logic?

• Run server-side code → functions.invoke()
• Need admin access → base44.asServiceRole.functions.invoke()

External services?

• Built-in integrations (email, AI) → integrations
• OAuth services (Google, Slack) → connectors (backend only)

Tracking and analytics?

• Track custom events → analytics.track()
• Log page views → appLogs.logUserInApp()
• Get usage stats → appLogs.getStats()

Common Patterns

Filter and Sort Data

const pendingTasks = await base44.entities.Task.filter(
  { status: "pending", assignedTo: userId },  // query
  "-created_date",                             // sort (descending)
  10,                                          // limit
  0                                            // skip
);

Protected Routes (check auth)

const user = await base44.auth.me();
if (!user) {
  base44.auth.redirectToLogin(window.location.href);
  return;
}

Backend Function Call

// Frontend
const result = await base44.functions.invoke("processOrder", {
  orderId: "123",
  action: "ship"
});

// Backend function (Deno)
import { createClientFromRequest } from "@base44/sdk";

Deno.serve(async (req) => {
  const base44 = createClientFromRequest(req);
  const { orderId, action } = await req.json();
  // Process with service role for admin access
  const order = await base44.asServiceRole.entities.Orders.get(orderId);
  return Response.json({ success: true });
});

Service Role Access

Use asServiceRole in backend functions for admin-level operations:

// User mode - respects permissions
const myTasks = await base44.entities.Task.list();

// Service role - full access (backend only)
const allTasks = await base44.asServiceRole.entities.Task.list();
const token = await base44.asServiceRole.connectors.getAccessToken("slack");

Frontend vs Backend

Backend functions use Deno.serve() and createClientFromRequest(req) to get a properly authenticated client.