In my case, an instance Model can be delete from:
a ListView inherited View
a DetailView inherited View
By default, when a delete view is called:
the get function calls 'confirm_delete' template. Instead I want a pop-up/modal to appear, and if delete is clicked in the modal will delete the object
if the delete operation is on a ListView, after delete the user will remain on ListView and the ListView content will be updated
if the delete operation is on a DetailView, after delete the user will be redirected to the ListView or another page(depending on other rules)
--
So I want to know how to do Ajax calls on delete, how to have conditional success urls in delete, based of where I am before the action.
For the DetailView you can simply use a form as follows:
<form action="{% url "app:delete" object.id %}" method="post">
{% csrf_token %}
<button onclick="return confirm('Are you sure?');">Delete</button>
</form>
Clicking on the button will open a confirm dialog. If the users clicks OK the form will be submitted. This will delete the object and redirect to the same way the confirm_delete page would have redirected.
For the ListView can simply send a POST request to the DeleteView and on success reload the current page to update the ListView. How you send your AJAX request depends on whether you use any libraries, but with jQuery it could be done as follows:
$.ajax('{% url "app:delete" object.id %}', {
method: 'POST',
success: function() {
window.location.reload();
},
});
Note: don't forget to include the csrf_token for the AJAX request to work. See the docs for more information.
Related
I have a spring-boot application, with theyemleaf. I repeatedly update the page, and redirect it to the same page, so i expect that the elements of the page get updated:
#GetMapping("/suggested-events/vote/{eventId}")
public String voteForEvents(Model model,
#PathVariable("eventId") Long eventId,
#RequestParam(value = "message", required = false) String message ) {
log.info("The message is: "+message);
SuggestedEvent event = suggestedEventService.findSuggestedEventById(eventId);
ArrayList<SuggestedEvent> events = suggestedEventService.findSuggestedEventsByArea(event.getArea());
model.addAttribute("mainEvent",event);
model.addAttribute("events",events);
model.addAttribute("message",message);
return "/suggested-event/vote";
}
and when a button get pushed in the view it triggers the below post method:
#PostMapping("/suggested-events/vote")
public String voteForASuggestedEvent(RedirectAttributes redirectAttributes){
log.info("You have made a vote");
redirectAttributes.addAttribute("message", "Success");
return "redirect:/suggested-events/vote/1";
}
This second controller method, performs an operation an makes a message, and redirects it to the first method. So, it successfully redirected to the first method and it logs
log.info("The message is: "+message);
but it does not refresh my page, and i do not get the message as model?
When i redirect to the first method, i expect it adds the message to my models:
model.addAttribute("message",message);
But it does not added to my page
and when a button get pushed in the view it triggers the below post
method:
It sounds like this trigger is using AJAX, rather than a form submit. Doing so would match the symptoms you describe.
If you POST to /suggested-events/vote using AJAX, the server will return a 302, and the browser will follow it. However, the response for that 302 is still the result of an AJAX call. You have access to it in your success callback, but the browser isn't going to render it for you.
but it does not refresh my page
If a 302 doesn't cause your page to re-render, this also suggests you're using AJAX.
If you actually use a form submit instead, the browser will re-render using the markup returned by the successful redirect.
This can be verified by using the following two buttons in your vote.html:
<form action="http://localhost:8080/suggested-events/vote" method="POST">
<input type="submit" text="Submit" />
</form>
<button onclick="postmessage();" >Button</button>
<script>
function postmessage() {
$.ajax({
method: 'POST',
data: {},
url: 'http://localhost:8080/suggested-events/vote'
});
}
</script>
The first button will work as expected, and the second button matches the symptoms you describe.
If you are already using a form, please update the question with it (or better yet, the entire Thymeleaf template).
I had the same problem as OP described and Mike's explanation brought me in the right direction.
I am reading a db-table and populating it with thymeleaf using th:each. I wanted to add a javascript-confirmation before deleting an item. Sending an ajax GET without an event-listener and reloading with location.reload(true) didn't reach the #GetMapping("/delete/{id}") in the controller.
This SO-thread gave me the answer to the ajax-call.
<a class="btn btn-danger" href="#" th:onclick="|confirmDeletion('${u.id}')|"></a>
<script th:inline="javascript">
function confirmDeletion(id) {
if (confirm("Delete this id? " + id)) {
var http = new XMLHttpRequest();
http.open("GET", "/delete/" + id, true);
http.addEventListener("readystatechange", function() {
if (http.readyState === 4 && http.status === 200) {
window.location.reload(true);
}
});
http.send();
}
}
</script>
there are many ways to redirect page in Spring, but be sure if the model attribute off message its passing correctly to FrontEnd or passing like parameter to another handler , you can see this document : http://javainsimpleway.com/spring-mvc-redirecting-model-attributes-from-one-controller-to-other-controller/ , hope this is useful !!
I have many buttons in single form that's why i used ajax to call different method on different button click event. But while I call method using ajax and return view, it send code of view as response, And i need to redirect on that view my method code is as below.
public function store(Request $request)
{
return view('surat.proceed_sell');
}
can i redirect on other view using ajax? Or any other way to call different methods on different button click event then please let me know.
What you could do is return the url where to redirect as a response in your controller as
return url('the path');
and in your ajax success callback you could redirect to the view as
window.location = data;
The url should be defined in your route file where the view is rendered.
You cannot redirect to a view with Ajax because Ajax expects a response. What you should do is redirect to a page instead, using anchors.
First, define your routes
Route::get('surat/proceed', 'SuratController#proceed');
Then use anchor with a button to go that page. It doesn't matter how many buttons you have in the form, as longs as they are not of type submit, they should not submit the form.
<form method="post" action="">
Go to proceed
<button type="submit" class="btn btn-primary">Submit</button>
</form>
If this does not help you, please, update your question with your form code.
If I have a web2py view (say tmp.load), I can force the form not to submit by returning false from the on submit handler.
<form onsubmit="return false;"><input type="text"><input type="submit" /></form>
That works when I view it directly: this form never submits. But if I load this view using
{{=LOAD('tmp.load', ajax=True)}}
Then the form submits, even though I was expecting it not to. So how do I write a LOAD component that contains a form which can be programmed not to submit if certain js conditions are met?
web2py.js automatically sets up event handlers for forms in components in order to submit them via Ajax. One possible approach is to intercept web2py's Ajax submission by setting up an ajax:beforeSend event handler. For example, in the view of the component (i.e., tmp.load), something like:
<script>
$(document).on('ajax:beforeSend', function(e, xhr, settings) {
if (settings.type === 'POST') {
if(abortAjaxSubmission) {
xhr.abort();
$.web2py.enableFormElements($('form#myform'));
}
}
});
</script>
In the above, abortAjaxSubmission represents the condition where you want to stop the submission. The selector form#myform represents the form in the component (you need to re-enable the form elements because web2py disables them upon submission but only re-enables them upon completion of the Ajax request, which won't happen if you abort).
I have a ajax function that is called by button tag
<button id="of_save" type="button" class="button-primary">
<?php echo __('Save All Changes', 'optionsframework');?>
</button>
$('#of_save').live('click',function() {
...
...
...
}};
The problem is that theme author put a single button on top of settings page and a million of settings, so every time I want to hit save, I must scroll whole page.
I found a little JS script that intercept CTRL+S or another browser combination and is working wonderful
http://www.openjs.com/scripts/events/keyboard_shortcuts
The problem is I don't know how to call the ajax function from this JS
shortcut.add("Ctrl+Shift+X",function() {
alert("Hi there!");
// not working...
live('click',function());
});
I've built an app that works, and uses forms to submit data. Once submitted, the view then redirects back to display the change. Cool. Django 101. Now, instead of using forms, I'm using Ajax to submit the data via a POST call. This successfully saves the data to the database.
Now, the difficult (or maybe not, just hard to find) part is whether or not it's possible to tell Django to add the new item that has been submitted (via Ajax) to the current page, without a page refresh. At the moment, my app saves the data, and the item shows up on the page after a refresh, but this obviously isn't the required result.
If possible, I'd like to use exactly the same view and templates I'm using at the moment - essentially I'd like to know if there's a way to replace a normal HTTP request (which causes page refresh) with an Ajax call, and get the same result (using jQuery). I've hacked away at this for most of today, so any help would be appreciated, before I pull all of my hair out.
I had a very similar issue and this is how I got it working...
in views.py
from django.utils import simplejson
...
ctx = {some data to be returned to the page}
if ajax == True:
return HttpResponse(simplejson.dumps(ctx), mimetype='json')
then in the javascript
jQuery.ajax({
target: '#id_to_be_updated',
type: "POST",
url: "/",
dataType: 'json',
contentType: "text/javascript; charset=\"utf-8\"",
data: {
'foo':foo,
'bar':bar,
},
success: function(data){
$("#id_to_be_updated").append(data.foo);
}
});
Here's how I did it:
The page that has the form includes the form like so
contact.html
{% include "contact_form.html" %}
This way it's reusable.
Next I setup my view code (this view code assumes the contact form needs to be save to the db, hence the CreateView):
class ContactView(CreateView):
http_method_names = ['post']
template_name = "contact_form.html"
form_class = ContactForm
success_url = "contact_form_succes.html"
There are a few things to note here,
This view only accepts pots methods, because the form will be received through the contact.html page. For this view I've setup another template which is what we included in contact.html, the bare form.
contact_form.html
<form method="POST" action="/contact">{% crsf_token %}
{{ form.as_p }}
</form>
Now add the javascript to the contact.html page:
$("body").on("submit", 'form', function(event) {
event.preventDefault();
$("#contact").load($(this).attr("action"),
$(this).serializeArray(),
function(responseText, responseStatus) {
// response callback
});
});
This POSTS the form to the ContactView and replaces whatever is in between #contact, which is our form. You could not use jquery's .load function to achieve some what more fancy replacement of the html.
This code is based on an existing working project, but slightly modified to make explaining what happens easier.