我正在尝试以下代码:
const Conn = mongoose.createConnection('mongodb://127.0.0.1:27017/db');
const addresses = Conn.collection('users').aggregate([
{
$project: {
_id: false,
ethAddr: true,
}
}
]);
我收到以下错误:
[...]\backend\node_modules\mongoose\lib\drivers\node-mongodb-native\collection.js:100
throw new Error('Collection method ' + i + ' is synchronous');
^
Error: Collection method aggregate is synchronous
at NativeCollection.<computed> [as aggregate] ([...]\backend\node_modules\mongoose\lib\drivers\node-mongodb-native\collection.js:100:15)
at file:///[...]/backend/scripts/dbGetMerkleRoot.js:11:46
at file:///[...]/backend/scripts/dbGetMerkleRoot.js:28:3
at ModuleJob.run (node:internal/modules/esm/module_job:185:25)
at async Promise.all (index 0)
at async ESMLoader.import (node:internal/modules/esm/loader:281:24)
at async loadESM (node:internal/process/esm_loader:88:5)
at async handleMainPromise (node:internal/modules/run_main:65:12)
以牛的名义我做错了什么?
看来是mongoose连接数据库的方式有问题。创建连接但在调用聚合方法之前未进行连接会导致引发该异常。我应该这样使用它:
// create custom connection
const Conn = mongoose.createConnection();
// connect to database
await Conn.openUri('mongodb://127.0.0.1:27017/db');
// @type {AggregationCursor}
const addresses = Conn.collection('users').aggregate([
{
$project: {
_id: false,
ethAddr: true,
}
}
]);
console.log( await addresses.toArray() );
令人沮丧的是,异常本身的记录很少。
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)