我在helpers/handlebars.js
中有一个非常简单的把手助手文件:
var hbs = require('express-handlebars');
hbs.registerHelper("inc", function(value, options) {
return parseInt(value) + 1;
});
但是,正如预期的那样,我无法引用{{#inc}}
助手,因为我没有将其传递到res.render()
函数中。有没有办法让我的文件中的所有助手都是全局的"自动包含"?
修改
在尝试了@ 1cgonza的精彩答案之后,我得到了:
hbs.registerHelper("inc", function(value, options) {
^
TypeError: undefined is not a function
运行应用时。这是app.js
:
var engine = require('express-handlebars');
require('./helpers/handlebars.js')(engine);
app.engine('hbs', engine({defaultLayout: 'layout', extname: 'hbs'}));
app.set('view engine', 'hbs');
有什么想法吗?
答案 0 :(得分:16)
您可以尝试将助手导出为模块,然后将其包含在主app.js
中这样的事情:
在helpers/handlebars.js
function hbsHelpers(hbs) {
hbs.registerHelper("inc", function(value, options) {
return parseInt(value) + 1;
});
// More helpers...
}
module.exports = hbsHelpers;
然后在你的app.js(或你用作索引的文件)。
var hbs = require('express-handlebars');
require('./helpers/handlebars')(hbs);
这对你有用吗?
修改强>
根据express-handlebars
docs,我会将helpers/handlebars.js
中的函数更改为以下内容:
function hbsHelpers(hbs) {
return hbs.create({
helpers: { // This was missing
inc: function(value, options) {
console.log('reading it');
return parseInt(value) + 1;
}
// More helpers...
}
});
}
module.exports = hbsHelpers;
告诉我们是否有效。
编辑2:
我的错误,helpers:{}
文件中的create()
函数中缺少将您的助手包裹在handelbars.js
内。我已经编辑了我以前的答案,看看我在哪里发表评论,知道我在说什么。
关于app.js
我觉得它有点混乱,所以让我重命名一些事情来说清楚:
// I've changed this from engine to exphbs,
// so there is no confusion with the express engine object that we use later.
var exphbs = require('express-handlebars');
// Create an instance of the express-handlebars
// If you want to pass any option offered by express-handlebar module
// do it inside the create() in the handlebars.js file
var handlebars = require('./helpers/handlebars.js')(exphbs);
// The handlebars variable now has an object called engine.
// Use that to define your app.engine
// As said before, you don't need to define any options here.
// Everything is defined in the create() in handlebars.js
app.engine('hbs', handlebars.engine);
// If you are using a different extension, you can change hbs to whatever you are using.
app.set('view engine', 'hbs');
答案 1 :(得分:9)
你可以尝试:
in helpers / handlebars.js:
var register = function(Handlebars) {
var helpers = {
inc: function(value, options) {
return parseInt(value) + 1;
},
foo: function(var1, var2) {
return ....
}
};
if (Handlebars && typeof Handlebars.registerHelper === "function") {
for (var prop in helpers) {
Handlebars.registerHelper(prop, helpers[prop]);
}
} else {
return helpers;
}
};
module.exports.register = register;
module.exports.helpers = register(null);
app.js中的:
var exphbs = require('express-handlebars');
var hbsHelpers = exphbs.create({
helpers: require("./helpers/handlebars.js").helpers,
defaultLayout: 'layout',
extname: '.hbs'
});
app.engine('.hbs', hbsHelpers.engine);
app.set('view engine', '.hbs');
答案 2 :(得分:0)
这是我的解决方案。您既可以注册自己的客户助手,也可以从“ handlebars-helpers”中注册客户助手:
const hbshelpers = require('handlebars-helpers');
const multihelpers = hbshelpers();
const helpersDM = {
hlp: echo => `Echo: ${echo}.`,
STATIC: `/static`,
};
const hbs = exphbs.create({
layoutsDir: join(__dirname, 'views', 'layouts'),
partialsDir: join(__dirname, 'views', 'partials'),
extname: '.hbs',
defaultLayout: 'base',
helpers: {...multihelpers, ...helpersDM},
});
app.engine('.hbs', hbs.engine);
app.setViewEngine('.hbs');
答案 3 :(得分:0)
您可以使用以下方法注册自己的助手,
在您的app.js中,首先导入express-handlebars,express npm模块
const exphbs = require("express-handlebars");
const express = require("express");
const app = express();
现在,使用将选项作为对象的create方法配置exphbs,
const myhbs = exphbs.create({/*config*/ extname:"hbs", helpers:{equal:function(a,b, options){return (a==b)?options.fn(this):options.inverse(this)}}});
app.engine("hbs", myhbs.engine);
app.set("view engine", "hbs");
通过像这样注册部分,可以在整个车把中将其用作内置功能。</ p>