I pass two variables during rendering in nodejs. Let's say they're templates & treeInfo.
In template.ejs I have.
<% for(var i=0; i<templates.length; i++) {%>
<%= templates[i]._id %> = <%= treeInfo.owner[0] %><br>
<% if (templates[i]._id == treeInfo.owner) { %>
ok
<% } %>
<% } %>
So actually if == doesn't work as expected. Here's the output.
59519779f36d284c166f9bea = 5941789e36593262bed9256b
5941789e36593262bed9256b = 5941789e36593262bed9256b
So it doesn't compare them the right way. If I just replace treeInfo.owner with something like '5941789e36593262bed9256b', it does work fine.
I assume ejs doesn't support variables comparation?
Thanks
Variable type can't understand.That's why toString() is required.
<% for(var i=0; i<templates.length; i++) {%>
<%= templates[i]._id %> = <%= treeInfo.owner[0] %><br>
<% if (templates[i]._id.toString() == treeInfo.owner.toString()) { %>
__append('Hello World');
<% } %>
To compare two objects / variables in EJS, as well as in nodejs
if(user1.equals(user2))
{
console.log("Both are equal");
}
I want to create an alternating layout using the static site generator hexo – the text of every second post on an overview page should be on the right.
The partial I’m using needs to pass on a custom variable like textOrientation = "left" to the partial function.
<%site.tags.findOne({name: 'featured'}).posts.sort('date', -1).limit(5).each(function(post, index) {%>
<%- partial('_partial/project-excerpt', {item: post}) %>
<% })%>
The template project_excerp.ejs then needs to generate the according classes bases on the passed variable.
My template (project_excerp.ejs):
<a class="???" href="/project/<%= item.slug %>"><%= item.title %></a>
So the questions are:
How can I extend the post variable with my own variable textOrientation and
How can I use an if then else in my project_excerp.ejs-template?
Okay, found a solution myself.
index.js:
<%site.tags.findOne({name: 'featured'}).posts.sort('date', -1).limit(5).each(function(post, index) {%>
<% if(index % 2 === 0) { %>
<% post.textOrientation = "left"; %>
<% } else { %>
<% post.textOrientation = "right"; %>
<% } %>
<%- partial('_partial/project-excerpt', {item: post}) %>
project_excerp.ejs:
<% var projectInfoClass = "ta-right"; %>
<% if(item.textOrientation === "right") {%>
<% projectInfoClass = "ta-left"; %>
<% } %>
<a class="<%= projectInfoClass %>" href="/project/<%= item.slug %>"><%= item.title %></a>
Also helpful to read the EJS-docs.
This might sound really easy. There is a very similar
answer but somehow my code is behaving abruptly and driving me crazy. I have spent last 4-5 hours on this. Any help would be great.
I am building a Socket.IO chat app using Node + Express + Passport. I want to compare the userId of the current user with that of other users connected. I want to show him all users except himself to chat with in Socket.IO.
Read comments on code for clarity :
users.js
app.get('/users', function (req, res) {
var connectedUsers = require('../app').chatUsers; // => This is an array of all logged in user and I am getting this all correctly.
if (req.isAuthenticated()) {
res.render('users', {
currentUser: req.user,
users: connectedUsers,
title: 'OnLineUsers'
});
}
});
users.ejs
<h3>CurrentUser : <%- currentUser.id %></h3> // => This Prints like **abcdefg**
<% for(var i = 0;i < users.length ; i++){ %>
<h3>UserID: <%- users[i].id %></h3> // => This also prints the same **abcdefg** if only one user is connected.
<% if( currentUser.id !== users[i].id){ %> // => But this Conditional Operator does not works and show the current user himself.
<ul>
<li>
<h3> <%= users[i].name %></h3>
<a href="/socket" id="chatRoomUrl">
<button type="submit" class="btn-success">Chat</button>
</a>
</li>
</ul>
<% } %>
<% } %>
Thanks in advance. If there is any silly mistake on my part, please excuse me for wasting your time.
Your code is fine. Maybe there is space in two property. Try :
currentUser.id.trim() !== users[i].id.trim()
Change your following line, notice the change:
<h3> <%= users[i].name %></h3>
to this:
<h3> <%- users[i].name %></h3>
I am following Sail.js tutorial from http://irlnathan.github.io/sailscasts/blog/2013/08/27/building-a-sails-application-ep4-handling-validation-errors-with-a-flash-message/
However I ran into a small problem. In the tutorial the author uses registration files inside his user folder and assigns routes in the user controller. He then sends validation errors using flash to the user.
However in my project, the registration files lies in the root folder and I assign the routes from the routes.js file like so
module.exports.routes = {
'/': {
view: 'index'
},
'/register': {
view: 'register'
}
};
Now the problem is to using flash to show users the validation errors while registration. I have used the following in the user controller (create) and it doesn't seem to work
if (err){
err.success = 0;
console.log(err);
req.session.flash = {
err: err
}
req.flash('error', req.session.flash);
return res.redirect('/register');
}
Any suggestions?
Sails.js version < 0.10.x based on his other thread output here
EDIT: See the Sails documentation here for more information - basically, since you're using static routing, no policies are applied before rendering the view, hence the flash policy isn't working. I'd recommend adding a register action in your UserController and just calling res.view() from there. There's also a StackOverflow post that discusses this, if you want more information.
I do have an alternative I developed for my own project that you can try out (also requires non-static routing).
In your api/policies folder, create a policy flash.js:
// flash.js policy
module.exports = function(req, res, next) {
res.locals.messages = { success: [], error: [], warning: [] };
if(!req.session.messages) {
req.session.messages = { success: [], error: [], warning: [] };
return next();
}
res.locals.messages = _.clone(req.session.messages);
// Clear flash
req.session.messages = { success: [], error: [], warning: [] };
return next();
};
This policy allows for three different flash types: success, warning, and error. It'll create an empty dictionary for each session and clear it on page loads.
I created a service FlashService.js in api/services to more easily flash messages:
// FlashService.js
module.exports = {
success: function(req, message) {
req.session.messages['success'].push(message);
},
warning: function(req, message) {
req.session.messages['warning'].push(message);
},
error: function(req, message) {
req.session.messages['error'].push(message);
}
}
Then, in your config/policies.js config file, make sure to assign the flash policy to the controller actions that you want to use flash with:
// config/policies.js
module.exports.policies = {
'*': [true, 'flash'],
'UserController': {
'register': ['flash'],
// any future actions that want flash
},
'AnotherController': {
'someAction': ['flash', 'somePolicy'],
}
}
To flash a message in your register action, just use FlashService.success(req, message). Alternatively, you can use FlashService.error and FlashService.warning, depending on how your UI styling works and how much you want to differentiate your flash messages.
In your view, you can put something like this:
<% if (messages && messages['error'].length > 0) { %>
<div class="alert alert-danger">
<% messages['error'].forEach(function(message) { %>
<%= message %>
<br>
<% }); %>
</div>
<br>
<% } %>
<% if (messages && messages['warning'].length > 0) { %>
<div class="alert alert-warning">
<% messages['warning'].forEach(function(message) { %>
<%= message %>
<br>
<% }); %>
</div>
<br>
<% } %>
<% if (messages && messages['success'].length > 0) { %>
<div class="alert alert-success">
<% messages['success'].forEach(function(message) { %>
<%= message %>
<br>
<% }); %>
</div>
<br>
<% } %>
Of course, you'll have to change the div classes to whatever classes are relevant to your UI.
In a normal mvc like rails or cakephp handling flash is something like this: $this->Flash->error('An Error Occurred Message'); then displayed it in an element.
In sails it should be simple as that.
In Controller: req.flash('error', 'An Error Occurred Message');
In View Partial: flash.ejs
<% if (req.session.flash) { %>
<% if (req.session.flash.success) { %>
<div data-alert class="alert-box success radius">
<%= req.flash('success') %>
×
</div>
<% } %>
<% if (req.session.flash.warning) { %>
<div data-alert class="alert-box warning radius">
<%= req.flash('warning') %>
×
</div>
<% } %>
<% if (req.session.flash.error) { %>
<div data-alert class="alert-box alert round">
<%= req.flash('error') %>
×
</div>
<% } %>
<% } %>
On Layout:
<%- partial('partials/flash') %>
Handling Error Message per field should be part in a Validation and Html Helper. (Like for example: https://gist.github.com/mikermcneil/8366092)
You can add this export:
module.exports = function flash(req, res, next) {
if (!req.session.flash) {
req.session.flash = {};
req.session.flash['success'] = [];
req.session.flash['warning'] = [];
}
next();
};
and then in the view:
<% if (req.session.flash['success'].length > 0) { %>
<div class="alert alert-success">
<%= req.session.flash['success'].pop() %>
</div>
<% } %>
<% if (req.session.flash['warning'].length > 0) { %>
<div class="alert alert-warning">
<%= req.session.flash['warning'].pop() %>
</div>
<% } %>
You can create messages in the controller like this:
req.session.flash['success'].push('Updated successfully');
I am trying to figure out a way to get access to all the app.locals in the views. In my app.js I have
app.locals.title = "Title"
app.locals.page = "Page 1"
This is good, and in the views, I can access each with
<%= title %>
<%= page %>
However, is there a way (without doing something like app.locals.xyz.title) to get all the locals in the view so I can do something like this:
<% for(var i=0; i < locals.length; i ++ ){ %>
<li><%= locals[i] %></li>
<% } %>
You have to explitly pass it:
res.locals.locals = res.locals;
Then in the view:
<%= locals %>