I'm makeing small Sails.js application. I have a very simple route like:
'/foo': 'FooController.index',
'/foo/:category': 'FooController.category',
My question is: how to make an url in server side rendered view to a category as a param.
I have something like:
<%= sails.getUrlFor('FooController.index') %>
for index, but I'd like to have something like
<%= sails.getUrlFor('FooController.index', {'category':'bar') %>
for a category.
Is there any function to do this like above? I don't want to hardcode the urls.
Thanks in advance and let the power be with you.
You can add the options you need as a query string on the URL returned from getUrlFor():
<%= sails.getUrlFor('FooController.index') %>?category=bar
There is no such helper function in sailsjs (or expressis). You can use .replace() function in addition to the sails.getUrlFor() function to generate the url:
<%= sails.getUrlFor('FooController.index').replace(':category', 'bar') %>
As a more general solution take a look at named routes package
Related
I'm new to express JS and try to build CMS like this:
Users have a page builder, where they can drag-and-drop different components on the page.
each component has its own data which also is defined by a user
Each component has its own view template
So, I have to check what components have to load, prepare data for each of them, send this data to an appropriate template, render one big HTML and send to the client.
I know, It's too complicated to explain how to build this, but any tutorials, examples, resources would be appreciated.
IIUC, you can accomplish this using the include function that most template languages have. For the example, I'll use ejs. Also, I'm assuming you know how to get the data for user selections to your server.
on your app.js:
app.get('/someRoute', function(req, res) {
var data = //get user data here
res.render('someTemplate', {data:data});
});
someTemplate.ejs:
<%- include('header') %> //you should do this on every page
<% if (data == 'foo') { %>
<%- include('foo', {data:data}) %> //note that you can pass data to templates like this
<% } %>
<% if (data == 'bar') %>
<%- include('bar') %>
<% } %>
<% include('footer') %>
foo.ejs:
//some component here
If you want to read more, check the docs.
Hope this helps!
You can use Template Engine for that purpose because it enables you to use static template files in your application. At run time, the template engine replaces variables in a template file with actual values, and transforms the template into an HTML file sent to the client. This approach makes it easier to design an HTML page.
Some popular template engines that work with Express are Pug, Mustache, and EJS. The Express application generator uses Jade as its default, but it also supports several others.
Also check this link
I am rendering a view with the EJS template engine based on some dynamic variables. For example:
res.render("index", {
dynamicVariable: newEverytime
});
I am currently inserting it inside my HTML like so
<% if(someCondition){ %>
<div>
<%= dynamicVariable %>
</div>
<% } %>
I want EJS to create a new <a>tag every time as opposed to replacing my a tag each time. How can I achieve this?
EJS on the server side doesn't create any DOM nodes. It processes HTML source code as text. It just prints strings and it's the HTML parser on the client side that creates the DOM nodes from that.
I think you are asking about a strange solution to a problems that you say nothing about. It would b more useful to ask about the actual problems you're having, what have you tried so far and why it's not working.
In Ruby on Rails, there is a block called <% provide:titleName %> and <% yield:titleName %> that can be used to switch out text when rendering from page to page.
Is there an equivalent method in Sails.js that mimics this?
Yes there is if you use the standard ejs templating
IN the HTML file use:
<%= variablename %> //This will be replaced by the data in variablename
In the Controller method used to serve the view use:
res.view("viewname", {variablename: someValue});
I hope this is what you are looking for, let me know!
I have a node.js that consumes mongodb data and outputs lists using knockout.js
When i invoke the view i pass a json structure using
res.render('list', { items:json });
In the list.ejs template page i've defined a hidden element:
<input type="hidden" id="hidden" value="<%= items %>">
and in .js file i read its value:
var json=$("#hidden").val();
var tkts=jQuery.parseJSON(json);
var vm=new AppViewModel(tkts);
Well...it runs but i think (hope) there must be a better way do it ... is there a way to avoid a hidden html var, for example?
Currently I can think of three ways to do this.
1.) Assign the data to a variable in your JavaScript code:
<script type="text/javascript">solution1 = {"name": "solution1"}</script>
solution1
2.) Add a data-attribute to an element of your liking:
<div id="solution2" data-value='{"name": "solution2"}'></div>
JSON.parse(document.getElementById('solution2').dataset.value)
3.) Use the script tag and choose a different content type than text/javascript or application/javascript
<script id="solution3" type="script" type="text/json">{"name": "solution3"}</script>
JSON.parse(document.getElementById('solution3').innerHTML)
Live demo
http://jsfiddle.net/bikeshedder/sbjud/
Personal note
It might sound boring, but the first option is probably the best choice. It is fast, requires as little code as possible and just works. I don't see a reason why you would want to have your data in a string first if you can have it as JavaScript data right away.
You could add an inline script if you are serving up a full page... Of course this would pollute the global namespace.
<script>
var tkts = <%= items %>;
</script>
If you are using AJAX to get this page... then break it into two AJAX requests... one of them gets the template, and the other one can get the list of items (as a JSON request). They could run in parallel so it might even be quicker.
I'm using express.js and EJS as template engine.
I don't understand how to use partials, I have seen at the examples but the author used JADE template engine, so I don't know how to apply it with EJS.
I have a simple view named: test.ejs and another .ejs file named part1.ejs
I need to show part1.ejs inside test.ejs.
I tried putting <% partial('part1', {}) %> (into test.ejs) but nothing happen, It does not include that file.
Could someone give me an example?
Thank you!
The correct code in your situation would be:
<%- partial('part1') %>
If you want to include unescaped HTML use <%- and if you want to escape HTML (unlinkely though when including a partial) you can use <%=.
Resources:
Node.js - EJS - including a partial
http://groups.google.com/group/express-js/browse_thread/thread/62d02af36c83b1cf
Its an old thread, but here is how you do it in the newer version of EJS.
<% include part1 %>
given part1.ejs contains the html you wish to include.