我正试图通过使用request模块/包从http调用到我的内部API的对象数组进行循环。到目前为止，我能够从API获取数据并在页面上显示完整的对象。我想在我的页面上显示它，并使用EJS模板系统循环使用它。我知道我可以用AngularJS做前端的东西，但我想看看我只使用服务器端能走多远。
server.js
// Prepend /api to my apiRoutes
app.use('/api', require('./app/api'));
api.js
var Report = require('./models/report');
var express = require('express');
var apiRoutes = express.Router();
apiRoutes.route('/reports', isLoggedIn)
.get(function (req, res,next) {
// use mongoose to get all reports in the database
Report.find(function (err, reports) {
// if there is an error retrieving, send the error.
// nothing after res.send(err) will execute
if (err)
return res.send(err);
res.json(reports);
});
});
routes.js
var User = require('./models/user');
var request = require('request');
module.exports = function (app, passport) {
app.get('/reports', isLoggedIn, function (req, res) {
res.render('pages/new-report.ejs', {
user: req.user,
title:'New Report'
});
});
request({
uri:'http://localhost:2016/api/reports',
method:'GET'
}).on('data',function(data){
console.log('decoded chunk:' + data)
}).on('response',function(resp){
resp.on('data', function(data){
console.log('received:' + data.length + ' bytes of compressed data');
app.get('/timeline', isLoggedIn, function (req, res) {
res.render('pages/timeline', {
user: req.user,
title:'Timeline',
reports: data
});
});
})
});
}
报告。ejs
因此，如果我简单地输出整个reports对象，像这样，在我的页面上<p><%= reports %></p> ，一切正常，我得到这样的东西:
[
{
"_id": "5775d396077082280df0fbb1",
"author": "57582911a2761f9c77f15528",
"dateTime": "30 June 2016 - 07:18 PM",
"picture": "",
"description": "",
"location": [
-122.46596999999997,
37.784495
],
"latitude": 37.784495,
"longitude": -122.46596999999997,
"address": "4529 California St, San Francisco, CA 94118, USA",
"contact": "John Doe",
"type": "Financial",
"__v": 0,
"updated_at": "2016-07-01T02:21:10.259Z",
"created_at": "2016-07-01T02:21:10.237Z",
"tags": [
"tag1,tag2"
]
}
]
但是如果我尝试循环通过对象，如下所示，它得到一个UNDEFINED作为我的report对象的返回属性，显然我得到一个无限循环。
<ul class="timeline">
<% reports.forEach(function(report) { %>
<li class="timeline-yellow">
<div class="timeline-time">
<span class="date" style="text-align:left">
<%= report.type %> </span>
<span class="time" style="font-weight:700;font-size:25px;line-height:20px;text-align:left;">
<%= report.dateTime %> </span>
</div>
</li>
<% }) %>
</ul>
我尝试了另一种循环，但我仍然不成功:
<ul class="timeline">
<% for (var i = 0; i < reports.length; i++) { %>
<li class="timeline-yellow">
<div class="timeline-time">
<span class="date" style="text-align:left">
<%= report[i].type %>
4/10/13 </span>
<span class="time" style="font-weight:700;font-size:25px;line-height:20px;text-align:left;">
<%= report[i].dateTime %> </span>
</div>
</li>
<% } %>
</ul>
ejs中的for循环的语法是完美的，但迭代数组名称是报告，您似乎在迭代中使用报告[i]，这需要更改为报告[i]，这应该工作。
报告。ejs
<ul class="timeline">
<% for (var i = 0; i < reports.length; i++) { %>
<li class="timeline-yellow">
<div class="timeline-time">
<span class="date" style="text-align:left">
<%= reports[i].type %>
4/10/13 </span>
<span class="time" style="font-weight:700;font-size:25px;line-height:20px;text-align:left;">
<%= reports[i].dateTime %> </span>
</div>
</li>
<% } %>
</ul>
I guess something like this ..
<% if (reports.length > 0){%> // Checking if there are reports
<ul class="timeline">
<% for (let report of reports){ %>
<li class="timeline-yellow">
<div class="timeline-time">
<span class="date" style="text-align:left">
<%= report.type %>
4/10/13 </span>
<span class="time" style="font-weight:700;font-size:25px;line-
height:20px;text-align:left;">
<%= report.dateTime %> </span>
</div>
</li>
<% } %>
</ul>
<%}%>
<%}%>
我使用loopback3和ejs的工作版本:
在服务器/boot/routes.js:module.exports = function(app) {
const router = app.loopback.Router();
router.get('/', function(req, res){
app.models.ZenGarden.find()
.then(plants => {
console.log('plants: ', plants)
res.render('index', {plants:plants})
}).catch(err => {
console.log('Failed to find in ZenGarden: ', err)
res.render('index')
})
});
router.post('/', function(req, res){
var plants = req.body.plants;
if (plants) {
for (var i = 0; i < plants.length; i++) {
console.log(plants[i])
app.models.ZenGarden.upsert(plants[i])
.then().catch(err => console.log(err))
}
}
return res.render('index', {plants:plants})
})
app.use(router);
};
<div>
<form action='/' method='POST'>
<% if (plants) { %>
<table>
<tr><td>Name</td><td>Count</td></tr>
<% for (var i = 0; i < plants.length; i++) { %>
<tr>
<input type='hidden' value=<%= plants[i].id %> name='plants[<%= i %>][id]'>
<input type='hidden' value="<%= plants[i].name %>" name='plants[<%= i %>][name]'>
<td><%= plants[i].name %></td>
<td><input type='text' value=<%= plants[i].count %> name='plants[<%= i%>][count]'</td></tr>
<% } %>
</table>
<button type='submit'>Save</button>
<% } else { %>
<p>No plant in Zen Garden :-(</p>
<% } %>
</form>
</div>
确保在server/server.js中添加以下内容:
const path = require('path')
const bodyparser = require('body-parser')
app.set('view engine', 'ejs')
app.set('views', path.resolve(__dirname, 'views'))
app.middleware('initial', bodyparser.urlencoded({extended:true}))
app.middleware('initial', bodyparser.json())
下面是zenggarden模型的定义(common/models/zen-garden.json):
{
"name": "ZenGarden",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"name": {
"type": "string",
"required": true
},
"count": {
"type": "number",
"required": true
}
},
"validations": [],
"relations": {},
"acls": [],
"methods": {}
}