Question

我正在尝试如下非常基本的车把模板：

// movies.hbs
<h1>Movies</h1>
<ul>
    {{#for movies}}
        {{#if this}} 
            <li><a href="http://www.imdb.com/title/{{ this.title }}">{{ this.title }}, {{ this.year }}
            {{this.genre}}</a>    
            </li>     
        {{else}}
            <li>No movies found.</li>
        {{/if}}
    {{/for}}
</ul>

但是，当我使用MongoDB数据库中检索到的文档进行渲染时，

MongoClient.connect("mongodb://localhost:27017/vidoes", function(err, db) {

        if (err) throw err;
        db.collection('movies').find({}).toArray(function(err, docs) {
        if (err) throw err;
        app.get('/', function(req, res){
            res.render('movies', {'movies':docs});
        });
        app.use(function(req, res){
            res.sendStatus(404);
        });
        var server = app.listen(3000, function() {
            var port = server.address().port;
            console.log("Express server listening on port %s.", port);
        });
    });
});

我收到奇怪的错误：

$ node app.js                                                                                                                                                                              
Express server listening on port 3000.
Error: Missing helper: "for"
    at Object.<anonymous> (/public_html/All Together Now/node_modules/handlebars/dist/cjs/handlebars/helpers/helper-missing.js:19:13)
    at Object.eval [as main] (eval at createFunctionContext (/public_html/All Together Now/node_modules/handlebars/dist/cjs/handlebars/compiler/javascript-compiler.js:254:23), <anonymous>:6:89)

当我尝试不使用数据库时，它给了我同样的错误。当然，在我访问主页之后。

    app.get('/', function(req, res){
          var docs = [{ "title" : "Minuscule: Valley of the Lost Ants (Minuscule - La vallée des fourmis perdues)", "genre" : "Adventure|Animation|Children", "year" : 1993 },
{  "title" : "Bambi Meets Godzilla", "genre" : "Animation|Comedy", "year" : 2003 },
{ "title" : "Annie Get Your Gun", "genre" : "Musical|Western", "year" : 2011 },
{ "title" : "Scary Movie 5 (Scary MoVie)", "genre" : "Comedy", "year" : 2005 }
];
          res.render('movies', {'movies':docs});
      });

var server = app.listen(3000, function() {
            var port = server.address().port;
            console.log("Express server listening on port %s.", port);
        });

任何帮助将不胜感激。

CS

Answer 1

您应该尝试使用mysql> update messages set read=1 where id=4; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read=1 where id=4' at line 1 mysql> show columns from messages; +-------------------+---------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------------+---------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | account_id | varchar(255) | NO | | NULL | | | subject | varchar(2048) | NO | | NULL | | | message | text | NO | | NULL | | | message_id | int(11) | NO | | 0 | | | read | int(11) | NO | | 0 | | | replied | int(11) | NO | | 0 | | | priority | int(11) | NO | | 0 | | | topic | int(11) | NO | | 0 | | | user_deleted | int(11) | NO | | 0 | | | created | datetime | NO | | NULL | | | modified | datetime | NO | | NULL | | | to_user_id | int(11) | NO | | 0 | | | recipient_deleted | int(11) | NO | | 0 | | | recipient_read | int(11) | NO | | 0 | | +-------------------+---------------+------+-----+---------+----------------+ 15 rows in set (0.00 sec)。在下面看看。

each

如果您想使用一些额外的东西，那么我将参考创建帮助器 https://gist.github.com/LeCoupa/6176077a9a8e2ad00eda

express-Handlebars：错误：缺少帮助器：“ for”

1 个答案: