[英]What is wrong with this Node Javascript one-line conditional?
這里是:
( result.username === user.username ) ? res.status( 500 ).json( "That username is already taken." ) : res.status( 500 ).json( "That email has already been used." )
如果條件為真, res.status( 500 ).json( "That username is already taken." )
是否不應該做第一件事res.status( 500 ).json( "That username is already taken." )
? 相反,它說:
[TypeError: undefined is not a function]
這按預期工作。
if ( result.username === user.username ) return res.status( 500 ).json( "That username is already taken." )
else return res.status( 500 ).json( "That email has already been used." )
抱歉,如果我仍然沒有發現錯字。
可以使用以下代碼:
var express = require('express');
var app = express();
app.get('/', function (req, res) {
(true) ? res.status( 500 ).json( "That username is already taken.") : res.status( 500 ).json( "That email has already been used." )
});
var server = app.listen(9000, function () {
var host = server.address().address;
var port = server.address().port;
console.log('Example app listening at http://%s:%s', host, port);
});
json()中的字符串不是JSON格式,請嘗試:
res.status( 500 ).json({msg:"That username is already taken."})
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