尝试使用内容标题将锚定链接添加到内容主体

Question

我已经使用MongoDB在Express中创建了一个简单的注释系统。 用户只需使用主屏幕上的表单输入标题和评论，然后它就会显示在页面底部的列表中。

但是，在它仅在页面上显示评论标题和正文之前，我想尝试做的是链接标题，以便在单击它时可以显示评论内容。

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);

我的观点：

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评论标题时，就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)

关于我为什么会收到此错误以及如何解决该错误以便获得预期行为的任何想法？

Answer 1

您正在使用

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

接着

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

您可能想要将这些路由之一更改为just /因为这就是说使用路由/:comment.title/:comment.title您可能还会遇到.title 。 如果您打算使用类似/SomeTitle.title的路由，则此方法将起作用，否则，您可能希望将其更改为/:title以便/SomeTitle可以起作用。 我只是在猜测您的意图。 这可能是您预期的工作方式。