[英]Unable to build react-native android app after updating to AndroidX and react-native version 0.59.10
[英]Unable to sync RxDB with couchdb on react-native after creating collections
为什么 rxdb 在沙发服务器上尝试连接/同步时会抛出此错误Error Sync: TypeError: undefined is not an object (evaluating 'db.todos.syncCouchDB')
我在我的 web 应用程序上测试了相同的 function 并且运行良好。 顺便说一句,我在 android 物理设备和 iOS 模拟器上使用它。
try {
//syncing...
db.todos.syncCouchDB({
remote: 'http://admin:somepassword@127.0.0.1:5984/itony_todo_app',
options: {
live: true,
retry: true,
},
});
} catch (error) {
console.log(`Error Sync: ${error}`);
throw error;
}
我的整个数据库初始化文件如下:
import {createRxDatabase} from 'rxdb';
import {addPouchPlugin, getRxStoragePouch} from 'rxdb/plugins/pouchdb';
import SQLite from 'react-native-sqlite-2';
import SQLiteAdapterFactory from 'pouchdb-adapter-react-native-sqlite';
import {RxTodoDatabase, todoSchema} from './src/schema/todo';
const SQLiteAdapter = SQLiteAdapterFactory(SQLite);
addPouchPlugin(SQLiteAdapter);
addPouchPlugin(require('pouchdb-adapter-http'));
async function _create(): Promise<RxTodoDatabase> {
let db;
try {
console.log(`Creating Database`);
db = await createRxDatabase<RxTodoDatabase>({
name: 'itony_todo_app',
storage: getRxStoragePouch('react-native-sqlite'),
password: 'mystupidlongpassword',
multiInstance: false,
ignoreDuplicate: true,
});
} catch (err) {
console.log(`Error Creating database: ${err}`);
throw err;
}
try {
//adding collections
console.log('adding collections');
(await db).addCollections({
todos: {
schema: todoSchema,
},
});
} catch (error) {
console.log(`Error adding collections: ${error}`);
throw error;
}
try {
//syncing...
db.todos.syncCouchDB({
remote: 'http://admin:213580@127.0.0.1:5984/itony_todo_app',
options: {
live: true,
retry: true,
},
});
} catch (error) {
console.log(`Error Sync: ${error}`);
throw error;
}
console.log('Database initiated...');
return db;
}
const DatabaseService = {
DB_CREATE_PROMISE: _create(),
get(): Promise<RxTodoDatabase> {
return this.DB_CREATE_PROMISE;
},
};
export default DatabaseService;
我的 package.json 如下也许我遗漏了一些东西,我不知道,也许缺少某个 package...
"dependencies": {
"base-64": "^1.0.0",
"events": "^3.3.0",
"pouchdb-adapter-http": "^7.2.2",
"pouchdb-adapter-react-native-sqlite": "^3.0.1",
"react": "17.0.2",
"react-native": "0.68.0",
"react-native-get-random-values": "^1.7.2",
"react-native-sqlite-2": "^3.5.2",
"rxdb": "^11.6.0",
"rxjs": "^7.5.5",
"uuid": "^8.3.2"
}
这可能是异步函数的竞争条件,不等待addCollections
。
尝试将(await db).addCollections
替换为await db.addCollections
,如下所示:
try {
//adding collections
console.log('adding collections');
await db.addCollections({
todos: {
schema: todoSchema,
},
});
} catch (error) {
console.log(`Error adding collections: ${error}`);
throw error;
}
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