尝试使用内容标题向内容正文添加锚链接

Question

我使用 MongoDB 在 Express 中创建了一个简单的评论系统。用户只需使用主屏幕上的表单输入标题和评论，然后它就会出现在页面底部的列表中。

但是，在它只是在页面上显示 cmets 标题和正文之前，我想尝试并做的是链接标题，以便当您单击它时，它会显示 cmets 内容。

我的模特：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var CommentSchema = new Schema({
    title: String,
    content: String,
    created: Date
});

module.exports = mongoose.model('Comment', CommentSchema);

我的看法：

extends layout

block content
  h1= title
  div.addCommentForm
        form( method="post", action="/create")
            div
                div
                    span.label Title :
                    input(type="text", class="nameTxt", name="title")
                div
                    span.label Comment :
                    textarea(name="comment")
                div#addCommentSubmit
                    input(type="submit", value="Save")
  br
  br
  #comments
    - each comment in comments
      div.comment
        a(href=comment.title) #{comment.title}
        div.name= comment.title
        div.content= comment.content 
        hr

我的 app.js：

require('./models/comments'); // require the model before the 'index.js' file is called

var express = require('express');
var path = require('path');
var favicon = require('static-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var create = require('./routes/create');
var show = require('./routes/show');

var app = express();

// Database stuff
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/comments-app');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(favicon());
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/create', create);
**app.use('/:comment.title', show)**; // add to render the comments content

/// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

/// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});


module.exports = app;

我的表演路线：

var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var Comment = mongoose.model('Comment', Comment);

router.get('/:comment.title', function(req, res) {
    res.send(comment.content)
});

module.exports = router;

当我在我的应用程序中单击 cmets 标题时，我会看到这个相当长的错误。

Not Found

404

Error: Not Found
    at Layer.app.use.res.render.message [as handle] (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/app.js:37:15)
    at trim_prefix (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:240:15)
    at /Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:208:9
    at Function.proto.process_params (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:269:12)
    at next (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:199:19)
    at next (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:176:38)
    at next (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:176:38)
    at /Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:137:5
    at /Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:250:10
    at next (/Users/Keva161/Documents/Projects/Webapps/Node/Express4-Comments-Mongoose/node_modules/express/lib/router/index.js:160:14)

关于我收到此错误的原因以及如何修复它以便获得预期行为的任何想法？

Answer 1

你正在使用

app.use('/:comment.title', show)

然后

router.get('/:comment.title', function(req, res)

您需要将这些路由之一更改为 /，因为这表示使用路由 /:comment.title/:comment.title 您可能还会遇到.title 的问题。如果您打算使用类似/SomeTitle.title 的路线，这将起作用，否则您可能希望将其更改为/:title，因此/SomeTitle 将起作用。我只是在猜测你的意图。这可能是您想要的工作方式。