Lookup类方法返回空对象而不是用户数据 [英] Lookup class method returns empty object instead of user data
问题描述
所以,我正在创建不同的助手来减少我的控制器上的一些代码。所以我创建了一个名为Lookup的类来帮助我搜索数据库中的用户,并创建了一个searchAccountKey(key,callback)。所以,每当我使用这种方法,它似乎工作,但是用户对象没有任何东西而不是用户返回。
我怀疑这是因为收益而发生的,但是当我请使用收益给我一个错误。
LookupHelper.js
'use strict';
const User = use('App / Model / User');
class LookupHelper {
//通过帐号键获取用户信息
static searchAccountKey(key,callback){
const user = User.findBy('key',key)
if(!user){
return callback(null)
}
return callback(user);
}
}
module.exports = LookupHelper;
UsersController(第44行)
Lookup.searchAccountKey(account.account,function(user){
return console.log(user);
});
编辑:无论何时我输入User.findBy()
关键字'yield'被保留const user = yield User.findBy('key',key)
代码:
'use strict';
const User = use('App / Model / User');
class LookupHelper {
//通过帐号键获取用户信息
static searchAccountKey(key,callback){
const user = yield User.findBy('key',key )
if(!user){
return callback(null)
}
return callback(user);
}
}
module.exports = LookupHelper;
关键字 yield
只能在一个生成器中使用。
searchAccountKey
目前是一个正常的功能。您需要在函数名称之前使用 *
使其成为生成器。
static * searchAccountKey(key,回调){
const user = yield User.findBy('key',key)
// ...
}
此更改后,您需要调用 Lookup.searchAccountKey
与 yield
还。
yield Lookup.searchAccountKey(...)
/ pre>
So, I am creating different helpers to reduce some code on my controller. So I created a class called Lookup to help me search for users in my database and I created a searchAccountKey(key, callback). So, whenever I utilize this method it seems to work however the user object returns with nothing instead of the user.
I am suspecting this is happening because of yield but when I do use yield it gives me an error.
LookupHelper.js
'use strict'; const User = use('App/Model/User'); class LookupHelper { // Grab the user information by the account key static searchAccountKey(key, callback) { const user = User.findBy('key', key) if (!user) { return callback(null) } return callback(user); } } module.exports = LookupHelper;
UsersController (line 44)
Lookup.searchAccountKey(account.account, function(user) { return console.log(user); });
EDIT: Whenever I put yield infront of the User.findBy()
The keyword 'yield' is reserved const user = yield User.findBy('key', key)
Code:
'use strict'; const User = use('App/Model/User'); class LookupHelper { // Grab the user information by the account key static searchAccountKey(key, callback) { const user = yield User.findBy('key', key) if (!user) { return callback(null) } return callback(user); } } module.exports = LookupHelper;
解决方案The keyword
yield
can be only used inside a generator.searchAccountKey
is currently a normal function. You need to use*
before the name of the function to make it a generator.static * searchAccountKey (key, callback) { const user = yield User.findBy('key', key) // ... }
After this change you will need to call
Lookup.searchAccountKey
withyield
also.yield Lookup.searchAccountKey(...)
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