Expressjs/AngularJS:实现req-flash后出错

Expressjs / AngularJS: Error after implementing req-flash

本文关键字：req-flash 出错 实现 AngularJS Expressjs      更新时间：2023-09-26

我这样实现req-flash：https://www.npmjs.com/package/req-flash.执行此操作后，会出现以下错误：

D:'_SOURCES'smfc'node_modules'req-flash'index.js:36
        if (options.locals) {
                   ^
TypeError: Cannot read property 'locals' of undefined
    at module.exports (D:'_SOURCES'smfc'node_modules'req-flash'index.js:36:13)
    at Object.<anonymous> (D:'_SOURCES'smfc'routes'index.js:6:13)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at Object.<anonymous> (D:'_SOURCES'smfc'app.js:15:14)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at Object.<anonymous> (D:'_SOURCES'smfc'bin'www:7:11)

这是req-flash:中index.js的一部分

module.exports = function(options) {
if (options.locals) {
    localsKey = options.locals;
}
return flash;
};

这是我的app.js:的介绍

var mongoose = require('mongoose');
require('./models/SupermarketGroups');
mongoose.connect('mongodb://smfc:smfc@ds011482.mlab.com:11482/smfc');
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var session      = require('express-session');
var bodyParser = require('body-parser');
var flash = require('req-flash');
var routes = require('./routes/index');
var users = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(cookieParser());
app.use(session({ secret: '123' }));
app.use(flash());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/users', users);

我的代码出了什么问题？

似乎req-flash模块中有一个错误。现在你可以像这样使用它：

app.use(flash({}));

或您可以在node-modules文件夹中打开req-flash，并使用更新index.js文件

module.exports = function(options) {
if (options != null && options.locals) {
    localsKey = options.locals;
}
return flash;
};

解释：因为它不处理选项的未定义情况，所以我们在像app.use(flash())那样实例化时不会传递这些情况。因此，只需检查选项或向其传递一个空对象。

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