I am rather new to MVC applications, and one thing I am trying to accomplish is enabling or disabling stylesheets based on a Session value.
I have stylesheets referenced in my Site.Master page in this manner:
<%=Html.Stylesheet("~/styles/main.css", "string")%>
<%=Html.Stylesheet("~/styles/additions.css", "string")%>
Right now, for testing, I have been putting an if statement around the Html.Stylesheet tags saying:
<% if (Session["cssRule"] = "enableCss") { %>
<%=Html.Stylesheet("~/styles/main.css", "screen")%>
<%=Html.Stylesheet("~/styles/additions.css", "screen")%>
<%} %>
So if the 'cssRule' Session value is null, no CSS loads. Currently this is working fine, but it is not exactly what I am looking for. Right now I set the Session value in the Controller when the user logs in, but ultimately I need to set the value of the Session variable depending on if a user clicks the enable or disable button. Since I have been primarily using webforms for the past year and a half, I just want to drop a hyperlink and set an event for it, but alas, this is the future of MVC so I need to figure out how I can do something like this..
So my real question is how can I set the Session of the "cssRule" value by clicking a link using MVC?
I'll assume you want to use a standard link (not ajax) and that your main view is Index
Just add a method in your controller (pseudocode)
public ActionResult ToggleCSS()
{
if (Session["cssRule"] != null && Session["cssRule"] == "enableCSS")
{
Session["cssRule"] = "disableCSS";
}
else
{
Session["cssRule"] = "enableCSS";
}
return View("Index");
}
Then in your view, use
<%= Html.ActionLink("ToggleCSS", "ControllerName") %>
You can use lots of fancy different methods to obtain the same result; use ajax and relaod the page, or not, or redirect to a page listing css files to apply, etc... but this one should work :)
Related
On user-registration confirmation I want to show a simple popup. For the moment, in order to simplify I'm happy to show an "Hello World".
This is the template file, views/templates/hook/registrationConfirm.tpl
<div id="idname" class="block">
<h1 class="title_block">HelloWorld</h1>
</div>
In my custom module I have this hook (which I know is being triggered doing debug):
public function hookActionCustomerAccountAdd($params) {
return $this->display(__FILE__, 'registrationConfirm.tpl');
}
It doesn't show anything (I also tried inspect the source code of the rendered page, but I dind't find the "HelloWorld")
Hooks starting by "Action" react to an action but do not display anything, but those starting with "Display" do.
You should also react to the hook displayCustomerAccount
public function hookActionCustomerAccountAdd() {
$this->is_new_account = true;
}
public function hookDisplayCustomerAccount()
{
if ($this->is_new_account) {
return $this->display(__FILE__, 'registrationConfirm.tpl');
}
}
I tried the solution posted by #shagshag but for some reason it doesn't work for me. So I share my solution (it's not pretty, nor efficient I think, but it seem to work for me): in the hookActionCustomerAccountAdd I save on a custom table (newCustomersTmp) email and customer id, because these are the data I need after, in the display Hook. Then in the hookDisplayCustomerAccount I check if an user with the current email ($this->context->customer->email) already exists in my table: if so I retrieve the data, do the actions I need with them and delete the row in the table.
Say I wrote a blog app in Sails.js.
On every page in this app, there is a sidebar widget called "Recent Posts", where it lists the titles of the 5 most recent posts and clicking on them takes you to the post in question.
Because this sidebar widget is present on every page, it should be in layout.ejs. But, here we have a conflict - dynamic content is only supposed to be pulled from the database in the controller action for rendering a specific view.
This dynamic content isn't for a specific view, it's for the whole site (via layout.ejs).
By the conventions that I understand, I'd have to get that dynamic content data for the sidebar widget in every controller action that renders a view (otherwise I would get an undefined error when I attempt to call that local in my layout.ejs file).
Things I've tried / considered:
Load that dynamic content in every controller action that renders a view (this solution is very bad) and calling that dynamic content in layout.ejs as if it were a local for the specific view. This works fine, but goes against D.R.Y. principles and quite frankly is a pain in the ass to have to run the same query to the database in every controller action.
As per another similar stackoverflow question, create a new config (E.G. config/globals.js), load my dynamic content from my database into that config file as a variable, and then calling sails.config.globals.[variable_name] in my layout.ejs file. This also worked, since apparently config variables are available everywhere in the application -- but it 's a hacky solution that I'm not a fan of (the content I'm loading is simply the titles and slugs of 5 recent posts, not a "global config option", as the solution implies).
Run the query to get the dynamic content inside the .EJS file directly between some <% %> tags. I'm not sure if this would work, but even if it did, it goes against the separation of concerns MVC principle and I'd like to avoid doing this if at all possible (if it even works).
As per a lengthy IRC discussion # http://webchat.freenode.net/?channels=sailsjs, it was suggested to create a policy and map that policy to all my controllers. In that policy, query the database for the 5 most recent posts, and set them to the req.recentposts. The problem with this solution is that, while the recent posts data will be passed to every controller, I still have to pass that req.recentposts data to my view -- making it so I still have to modify every single res.view({}) in every action. I don't have to have the database query in every action, which is good, but I still have to add a line of code to every action that renders a view... this isn't D.R.Y. and I'm looking for a better solution.
So, what is the proper solution, without needing to load that dynamic content in every controller action (a solution that adheres to D.R.Y. is what I'm lookng for), to get some dynamic content available to my layout.ejs file?
In folder /config you should create a file express.js and add something like that:
module.exports.express = {
customMiddleware: function(app){
app.use(function(req, res, next){
// or whatever query you need
Posts.find().limit(5).exec(function(err, posts){
res.locals.recentPosts = posts;
// remember about next()
next();
});
});
}
}
Then just make some simple loop in your view:
<% for(var i=0; i<recentPosts.length; i++) { %>
<% recentPosts[i].title %>
<% } %>
Here are some links to proper places in documentation:
https://github.com/balderdashy/sails-docs/blob/0.9/reference/Configuration.md#express
and
https://github.com/balderdashy/sails-docs/blob/0.9/reference/Response.md#reslocals
I found out another way to do this. What I did was to create a service that could render .ejs files to plain html by simply taking advantage of the ejs library already in sails. This service could either be invoked by the controller, or even passed as a function in the locals, and executed from within the .ejs. The service called TopNavBarService would look like:
var ejs = require('ejs');
exports.render = function() {
/* database finds goes here */
var userInfo = {
'username' : 'Kallehopp',
'real_name' : 'Kalle Hoppson'
};
var html = null;
ejs.renderFile('./views/topNavBar.ejs', {'locals':userInfo}, function(err, result) { html = result; });
return html;
}
In the constroller it could look like:
module.exports = {
testAction: function (req, res) {
return res.view('testView', {
renderNavbar: TopNavBarService.render // service function as a local!
});
}
};
This way you can create your customized ejs-helper that could even take arguments (although not shown here). When invoked, the helper could access the database and render a part of the html.
<div>
<%- renderNavbar() %>
</div>
I'm using jquery-ui tab example to add extra tabs. I changed that code to be able to add tabs that load a form via Ajax. I was able to create that just changing these:
var $tabs = $( "#tabs").tabs({
cache: true,
tabTemplate: "<li><a href='formularioAgricola.php' id='#{label}'>#{label}</a> <span class='ui-icon ui-icon-close'>Remove Tab</span></li>"
//ajaxOptions: a
});
So I changed the tabTemplate to load the same Form always.
My problem is that I'm not sure how to retrieve, either to tell that every tag from that form use jquery-ui stuff, like buttons, datepickers, etc.
In a regular form I would do something like:
$("#btnRevisar").button()
But when we talk about form load via Ajax it is different.
and also, how can I try to differ one form from other one, if they are all named with the same name, is it possible?
Thanks guys
Carlos.
Within the tabs docs page, tab titled "Events" there is a "load" event. The "ui" argument gives you access to an object that includes the current panel that is loaded. If you are using same ID on forms, beware that ID's must be unique in a page.
var $tabs = $( "#tabs").tabs({
cache: true,
tabTemplate: "<li><a href='formularioAgricola.php' id='#{label}'>#{label}</a> <span class='ui-icon ui-icon-close'>Remove Tab</span></li>",
/* add new option for load event*/
load: function( event, ui){
var $currTabContentPanel=$(ui.panel);
/* only look in currently loaded content for formClass*/
$currTabContentPanel.find('.formClass').doSomething()
}
});
I am currently working on a project developed using Zend Framework, based on the structure of my web page design I have reached a point where I have to pass a small number of variables to my layout from each Controller/Action. These variables are:
<?php Zend_Layout::getMvcInstance()->assign('pageId', 'page1'); ?>
<?php Zend_Layout::getMvcInstance()->assign('headerType', '<header id="index">'); ?>
The reason for passing this information is firstly, I pass the page id as the multi column layout may change depending on the content being displayed, thus the page id within the body tag links the appropriate CSS to how the page should be displayed. Secondly I display a promotional jQuery slider only on the index page, but I need the flexibility to have it displayed on potentially multiple pages in case the wind changes and the client changes their mind.
My actual question: Is there a more appropriate method of passing this information to the Layout that I am overlooking?
I am not really questioning whether the information has to be sent, rather is there some Zend Framework feature that I have, in my haste, overlooked which would reduce the amount of repetitive redundant code which may very well be repeated in multiple Actions within the same controller?
You could turn that logic into an action helper than you can call from your controllers in a more direct way. You could also make a view helper to accomplish the same thing but view helpers usually generate data for the view rather than set properties.
// library/PageId.php
class Lib_PageId extends Zend_Controller_Action_Helper_Abstract
{
public function direct($title, $pageId, $headerType)
{
$view = $this->getActionController()->view;
$view->headTitle()->append($title);
$view->pageId = $pageId;
$view->headerType = $headerType;
}
}
In your controller actions you can now do this:
$this->_helper->PageId('Homepage', 'page1', 'index');
// now pageId and headerType are available in the view and
// Homepage has been appended to the title
You will also need to register the helper path in your Bootstrap like this:
protected function _initActionHelpers()
{
Zend_Controller_Action_HelperBroker::addPrefix('Lib');
}
Doing it like that can reduce the amount of repetitive code and remove needing to assign the values from the view. You can do it in the controller very quickly. You can also have default values in the case that the helper hasn't been called.
You shoudn't really be passing anything from the view to the layout, for a start the view should be included IN the layout, not the other way around.
So, setting your page title should be done using similar code to what you have, but inside the controller action being called:
$this->view->headTitle()->append('Homepage');
And the other two issues - you need to rethink as I stated to begin with. Maybe you're misunderstanding the layout/view principle? If you include the different views per action, then you simply change the div id when needed, and include the header for your banner only in the index.phtml file.
I have 2 , one is update user details another is change password panel. Both has separate "update" button. I don't want user details part to be validated when I click on update button of change password and the vice versa applies the same. Presently I am using the following code in View.
[Required]
[DataType(DataType.Password)]
[DisplayNameLocalized(typeof(CapnorResource), "RepeatNewPassword")]
public string RepeatNewPassword { get; set; }
in UI following is the code.
<div class="passwordtd">
<%: Html.LabelFor(view => view.RepeatNewPassword)%>
<%: Html.PasswordFor(view => view.RepeatNewPassword)%>
<%: Html.ValidationMessageFor(view => view.RepeatNewPassword)%>
</div>
I'm not quite sure from the wording of the question, but with two different buttons, it sounds like two different forms with two different ViewModels. The ViewModels could make up one large ViewModel, or you could use RenderPartial to separate them completely.
I had same scenario with little twist.
I had a single Account page and change password is a rendered as partial inside the main page, the change password has its own update button and the partial is rendered inside a div id="secure" tag which gets hidden in $(document).ready(). There is a link on main account details page which unhides the div.
I acheived partial validation as follows.
1)Created a temporary div out side the form tag.
2)On $(document).ready() I append the change password partial to the temporary div so when the main Account Details validation are fired the change Password's validation are not fired.
3) when the link to unhide the change password partial is clicked I again append the change password partial to form and then on Update button of change password partial I manually call validation mehods
var validator = $("form").validate();
var oldpass = document.getElementById("OldPasswordfeild");
var newpass = document.getElementById("NewPasswordfeild");
var conpass = document.getElementById("ConfirmPasswordfeild");
if (!validator.element(oldpass) || !validator.element(newpass) || !validator.element(conpass))
{
isvalid = false;
}
so only change password partials validation are fired and if they are valid I make a ajax post to my controller and if it is successful hide the div and again append it to temporary div out side the form.
Above thing works like a charm.