[英]Database reference is not defined in arangojs on node js
I am trying to use ArangoJS drive on Node JS, when I add following code to main app.js file it works but when added to a function in a class in different file it throws an error.我正在尝试在 Node JS 上使用 ArangoJS 驱动器,当我将以下代码添加到主 app.js 文件时它可以工作,但是当添加到不同文件中 class 中的 function 时,它会引发错误。
Database is not defined
数据库未定义
Code is as follows代码如下
class User {
insertUser() {
Database = require('arangojs').Database;
db = new Database();
db.useBasicAuth("", "");
db.useDatabase('_system');
collection = db.collection('Users');
doc = {
_key: 'firstDocument',
a: 'foo',
b: 'bar',
c: Date()
};
collection.save(doc).then(
meta => console.log('Document saved:', meta._rev),
err => console.error('Failed to save document:', err)
);
}
contructor() {
}
}
module.exports = User;
If I use the code from insertUser function in app.js directly it works fine.如果我直接在 app.js 中使用 insertUser function 中的代码,它可以正常工作。
Kindly advice好心劝告
Thanks谢谢
Note: I am using Express with Node js注意:我使用 Express 和 Node js
You need to require database outside of the class and use const:您需要 class 之外的数据库并使用 const:
const { Database } = require('arangojs');
class User {
contructor() {}
insertUser() {
db = new Database();
db.useBasicAuth("", "");
db.useDatabase('_system');
collection = db.collection('Users');
doc = {
_key: 'firstDocument',
a: 'foo',
b: 'bar',
c: Date()
};
collection.save(doc).then(
meta => console.log('Document saved:', meta._rev),
err => console.error('Failed to save document:', err)
);
}
}
module.exports = User;
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