diff --git a/packages/api/src/index.ts b/packages/api/src/index.ts
index 58e06fe30..75aecc112 100644
--- a/packages/api/src/index.ts
+++ b/packages/api/src/index.ts
@@ -35,9 +35,9 @@ const api = new Server({
 });
 
 const plugins = [
-  '@nocobase/plugin-collections',
   '@nocobase/plugin-ui-router',
   '@nocobase/plugin-ui-schema',
+  '@nocobase/plugin-collections',
   '@nocobase/plugin-users',
   '@nocobase/plugin-action-logs',
   '@nocobase/plugin-file-manager',
diff --git a/packages/app/package.json b/packages/app/package.json
index 529e8ce4d..f44da2545 100644
--- a/packages/app/package.json
+++ b/packages/app/package.json
@@ -36,7 +36,7 @@
     "@nocobase/plugin-ui-router": "^0.4.0-alpha.7",
     "@nocobase/plugin-ui-schema": "^0.4.0-alpha.7",
     "@nocobase/plugin-users": "^0.4.0-alpha.7",
-    "@nocobase/plugin-saas": "^0.4.0-alpha.7",
+    "@nocobase/plugin-multi-apps": "^0.4.0-alpha.7",
     "@nocobase/server": "^0.4.0-alpha.7",
     "@umijs/preset-react": "1.x",
     "koa-mount": "^4.0.0",
diff --git a/packages/app/src/apis/index.ts b/packages/app/src/apis/index.ts
index bdb3a2c2f..5aede5b64 100644
--- a/packages/app/src/apis/index.ts
+++ b/packages/app/src/apis/index.ts
@@ -41,9 +41,9 @@ const api = new Server({
 });
 
 const plugins = [
-  '@nocobase/plugin-saas',
-  '@nocobase/plugin-ui-schema',
+  '@nocobase/plugin-multi-apps',
   '@nocobase/plugin-ui-router',
+  '@nocobase/plugin-ui-schema',
   '@nocobase/plugin-collections',
   '@nocobase/plugin-users',
   '@nocobase/plugin-action-logs',
diff --git a/packages/app/src/pages/index.tsx b/packages/app/src/pages/index.tsx
index be4e3c722..62595b2b8 100644
--- a/packages/app/src/pages/index.tsx
+++ b/packages/app/src/pages/index.tsx
@@ -8,8 +8,9 @@ import {
   AdminLayout,
   AuthLayout,
   RouteSchemaRenderer,
+  ConfigProvider,
+  ClientSDK,
 } from '@nocobase/client';
-import { UseRequestProvider } from 'ahooks';
 import { extend } from 'umi-request';
 
 const request = extend({
@@ -26,6 +27,8 @@ request.use(async (ctx, next) => {
   await next();
 });
 
+const client = new ClientSDK({ request });
+
 const RouteSwitch = createRouteSwitch({
   components: {
     AdminLayout,
@@ -52,12 +55,8 @@ const App = () => {
 
 export default function IndexPage() {
   return (
-    <UseRequestProvider
-      value={{
-        requestMethod: (service) => request(service),
-      }}
-    >
+    <ConfigProvider client={client}>
       <App />
-    </UseRequestProvider>
+    </ConfigProvider>
   );
 }
diff --git a/packages/collections/src/database.ts b/packages/collections/src/database.ts
index 5aae72e00..64acf66de 100644
--- a/packages/collections/src/database.ts
+++ b/packages/collections/src/database.ts
@@ -133,7 +133,15 @@ export class Database extends EventEmitter {
   }
 
   async sync(options?: SyncOptions) {
-    return this.sequelize.sync(options);
+    const isMySQL = this.sequelize.getDialect() === 'mysql';
+    if (isMySQL) {
+      await this.sequelize.query('SET FOREIGN_KEY_CHECKS = 0', null);
+    }
+    const result = await this.sequelize.sync(options);
+    if (isMySQL) {
+      await this.sequelize.query('SET FOREIGN_KEY_CHECKS = 1', null);
+    }
+    return result;
   }
 
   async close() {
diff --git a/packages/database/src/database.ts b/packages/database/src/database.ts
index eee4f26d9..d9ad5782a 100644
--- a/packages/database/src/database.ts
+++ b/packages/database/src/database.ts
@@ -465,6 +465,33 @@ type HookType =
     return this.sequelize.close();
   }
 
+  /**
+   * 添加 hook
+   * 
+   * @param hookType 
+   * @param fn 
+   */
+   public addHook(hookType: HookType | string, fn: Function) {
+    const hooks = this.hooks[hookType] || [];
+    hooks.push(fn);
+    this.hooks[hookType] = hooks;
+  }
+
+  /**
+   * 运行 hook
+   *
+   * @param hookType 
+   * @param args 
+   */
+  public async runHooks(hookType: HookType | string, ...args) {
+    const hooks = this.hooks[hookType] || [];
+    for (const hook of hooks) {
+      if (typeof hook === 'function') {
+        await hook(...args);
+      }
+    }
+  }
+
   public getFieldByPath(fieldPath: string) {
     const [tableName, fieldName] = fieldPath.split('.');
     return this.getTable(tableName).getField(fieldName);
diff --git a/packages/database/src/model.ts b/packages/database/src/model.ts
index 0caffbe97..0d734adcf 100644
--- a/packages/database/src/model.ts
+++ b/packages/database/src/model.ts
@@ -534,8 +534,6 @@ export abstract class Model extends SequelizeModel {
       ...options,
       transaction,
     });
-    // @ts-ignore
-    // await this.sequelize.runHooks('afterUpdateAssociations', this, options);
 
     if (!options.transaction) {
       await transaction.commit();
diff --git a/packages/database/src/table.ts b/packages/database/src/table.ts
index c2d3e007d..47d54c59c 100644
--- a/packages/database/src/table.ts
+++ b/packages/database/src/table.ts
@@ -139,6 +139,7 @@ export class Table {
 
   constructor(options: TableOptions, context: TabelContext) {
     const { database } = context;
+    database.runHooks('beforeTableInit', options);
     database.emit('beforeTableInit', options);
     const {
       model,
@@ -158,6 +159,7 @@ export class Table {
     this.setFields(fields);
     this.initSortable();
     database.emit('afterTableInit', this);
+    database.runHooks('afterTableInit', this);
   }
 
   public initSortable() {
@@ -313,6 +315,7 @@ export class Table {
    * @param reinitialize 
    */
   public addField(options: FieldOptions, reinitialize: Reinitialize = true) {
+    this.database.runHooks('beforeAddField', options, this);
     this.database.emit('beforeAddField', options, this);
     const { name, index } = options;
     const field = buildField(options, {
@@ -350,6 +353,7 @@ export class Table {
     }
     this.modelInit(reinitialize);
     this.database.emit('afterAddField', field, this);
+    this.database.runHooks('afterAddField', field, this);
     return field;
   }
 
diff --git a/packages/plugin-collections/src/server.ts b/packages/plugin-collections/src/server.ts
index b9a53eed8..5ff485d1b 100644
--- a/packages/plugin-collections/src/server.ts
+++ b/packages/plugin-collections/src/server.ts
@@ -5,31 +5,40 @@ import * as models from './models';
 import { createOrUpdate, findAll } from './actions';
 import { create } from './actions/fields';
 
+registerModels(models);
+
 export default {
   name: 'collections',
   async load(this: Plugin) {
     const database = this.app.db;
 
-    registerModels(models);
-
     database.import({
       directory: path.resolve(__dirname, 'collections'),
     });
 
     this.app.on('beforeStart', async () => {
-      await database.getModel('collections').load();
+      await database.getModel('collections').load({
+        skipExisting: true,
+      });
     });
 
     this.app.on('db.init', async () => {
-      const userTable = database.getTable('users');
-      const config = userTable.getOptions();
+      const tableNames = ['users', 'applications'];
       const Collection = database.getModel('collections');
-      const collection = await Collection.create(config);
-      await collection.updateAssociations({
-        generalFields: config.fields.filter((field) => field.state !== 0),
-        systemFields: config.fields.filter((field) => field.state === 0),
-      });
-      await collection.migrate();
+      for (const tableName of tableNames) {
+        const table = database.getTable(tableName);
+        console.log(tableName, table);
+        if (!table) {
+          continue;
+        }
+        const config = table.getOptions();
+        const collection = await Collection.create(config);
+        await collection.updateAssociations({
+          generalFields: config.fields.filter((field) => field.state !== 0),
+          systemFields: config.fields.filter((field) => field.state === 0),
+        });
+        // await collection.migrate();
+      }
     });
 
     const [Collection, Field] = database.getModels(['collections', 'fields']);
diff --git a/packages/plugin-saas/.gitignore b/packages/plugin-multi-apps/.gitignore
similarity index 100%
rename from packages/plugin-saas/.gitignore
rename to packages/plugin-multi-apps/.gitignore
diff --git a/packages/plugin-saas/.npmignore b/packages/plugin-multi-apps/.npmignore
similarity index 100%
rename from packages/plugin-saas/.npmignore
rename to packages/plugin-multi-apps/.npmignore
diff --git a/packages/plugin-saas/package.json b/packages/plugin-multi-apps/package.json
similarity index 89%
rename from packages/plugin-saas/package.json
rename to packages/plugin-multi-apps/package.json
index ac9f3792d..e47d03ede 100644
--- a/packages/plugin-saas/package.json
+++ b/packages/plugin-multi-apps/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "@nocobase/plugin-saas",
+  "name": "@nocobase/plugin-multi-apps",
   "version": "0.4.0-alpha.7",
   "main": "lib/index.js",
   "license": "MIT",
diff --git a/packages/plugin-saas/src/index.ts b/packages/plugin-multi-apps/src/index.ts
similarity index 100%
rename from packages/plugin-saas/src/index.ts
rename to packages/plugin-multi-apps/src/index.ts
diff --git a/packages/plugin-saas/src/server.ts b/packages/plugin-multi-apps/src/server.ts
similarity index 82%
rename from packages/plugin-saas/src/server.ts
rename to packages/plugin-multi-apps/src/server.ts
index 8a77572a7..5ae7a5d4f 100644
--- a/packages/plugin-saas/src/server.ts
+++ b/packages/plugin-multi-apps/src/server.ts
@@ -31,6 +31,7 @@ function createApp(opts) {
         },
       },
     },
+    // 不能再 bodyParser，会卡死
     bodyParser: false,
     // dataWrapping: false,
     resourcer: {
@@ -40,9 +41,8 @@ function createApp(opts) {
   const app = new Application(options);
 
   app.db.sequelize.beforeDefine((model, options) => {
-    options.tableName = `saas_${name}_${
-      options.tableName || options.name.plural
-    }`;
+    options.tableName = `saas_${name}_${options.tableName || options.name.plural
+      }`;
   });
 
   app.resource({
@@ -126,9 +126,19 @@ export default {
     this.app['apps'] = new Map<string, Application>();
     this.app.collection({
       name: 'applications',
+      title: '应用',
       fields: [
-        { type: 'string', name: 'name', unique: true },
-        { type: 'belongsTo', name: 'user' },
+        {
+          type: 'string',
+          name: 'name',
+          interface: 'string',
+          unique: true,
+          uiSchema: {
+            type: 'string',
+            title: '名称',
+            'x-component': 'Input',
+          },
+        },
       ],
     });
     this.app.use(
@@ -138,6 +148,23 @@ export default {
         },
       }),
     );
+    this.app.db.on('applications.afterCreate', async (model) => {
+      const name = model.get('name');
+      const app = createApp({
+        name,
+      });
+      (async () => {
+        await app.load();
+        await app.db.sync({
+          force: true,
+          alter: {
+            drop: true,
+          },
+        });
+        await app.emitAsync('db.init');
+        await app.destroy();
+      })()
+    });
     this.app
       .command('app:create')
       .argument('<appName>')