I have a django register form .On the event of an invalid form submission, page is reloading.I need to stay on that same page if the data entered is invalid.
Is there any way to get this done without ajax ?
If not, how to do this with ajax
Well if you want to validate the data before submitting then you can just use plain javascript to validate the values and update your html displaying output as shown below.
Consider this below form.
<form>
<input id="target" type="text" value="">
</form>
<div id="other">
Trigger the handler
</div>
Use below script
<script>
$("#target").keyup(function () {
console.log(this.value);
});
</script>
In above script once you get the value you can write the logic to valid the same and update you result in html accordingly.
NOTE: Main point here is the event handler as you type anything it calls the function.
Obviously this may not be the best way to achieve this but consider this as demonstration.
Related
I try to preselect an option of a select in an embedded HTML form in Camunda Tasklist, but always the first option is preselected.
I followed Binding to a Process Variable:
Binding to a Process Variable
A select box can be bound to a process variable using the cam-variable-name directive:
<select cam-variable-name="foo" cam-variable-type="String">
<option>bar</option>
<option>zar</option>
</select>
Research
I read also CAM-3173:
select box doesn't show the correct option
If I set the value of variable by a select box on the start form, the next task form didn't show the option that has been choosen in the start form. It uses the same select box.
but I use Camunda 7.9 and the problem is fixed since version 7.2.3.
HTML
<form>
<select cam-variable-name="variable" cam-variable-type="String">
<option value="option1">option1</option>
<option value="option2">option2</option>
</select>
</form>
Result
option1 is preselected. I checked the process variable before entering the user task and it contains option2.
What did I wrong? If the bug still exists, is there any work-around?
I found a work-around, see Camunda Reference:
Implementing Custom Fields
The following is a small usage example which combines some of the features explained so far. It uses custom JavaScript to implement a custom interaction with a form field which does not use any cam-variable-* directives.
It shows how custom scripting can be used for
declaring a variable to be fetched from the backend,
writing the variable’s value to a form field,
reading the value upon submit.
[...]
The above example uses jQuery for interacting with the HTML controls. If you use AngularJS, you can also populate the $scope in the variables-fetched callback and read the values from the $scope in the submit callback:
My changed HTML:
<form>
<script cam-script type="text/form-script">
camForm.on('form-loaded', function() {
camForm.variableManager.fetchVariable('variable');
});
camForm.on('variables-fetched', function() {
$scope.variable = camForm.variableManager.variable('variable');
});
camForm.on('submit', function() {
camForm.variableManager.variableValue('variable', $scope.variable);
});
</script>
<select data-ng-model="variable">
<option value="option1">option1</option>
<option value="option2">option2</option>
</select>
</form>
I have a form which I am validating using CFWheels model validation and form helpers.
My code for index() Action/View in controller:
public function index()
{
title = "Home";
forms = model("forms");
allforms = model("forms").findAll(order="id ASC");
}
#startFormTag(controller="form", action="init_form")#
<select class="form-control">
<option value="">Please select Form</option>
<cfloop query="allforms">
<option value="#allforms.id#">#allforms.name#</option>
</cfloop>
</select>
<input type="text" name="forms[name]" value="#forms.name#">
#errorMessageOn(objectName="forms", property="name")#
<button type="submit">Submit</button>
#endFormTag()#
This form is submitted to init_form() action and the code is :
public function init_form()
{
title = "Home";
forms = get_forms(params.forms);
if(isPost())
{
if(forms.hasErrors())
{
// don't want to retype allforms here ! but index page needs it
allforms = model(tables.forms).findAll(order="id ASC");
renderPage(action="index");
//redirectTo(action="index");
}
}
}
As you can see from the above code I am validating the value of form field and if any errors it is send to the original index page. My problem is that since I am rendering page, I also have to retype the other variables that page need such as "allforms" in this case for the drop down.
Is there a way not to type such variables? And if instead of renderPage() I use redirectTo(), then the errors don't show? Why is that?
Just to be clear, I want to send/redirect the page to original form and display error messages but I don't want to type other variables that are required to render that page? Is there are way.
Please let me know if you need more clarification.
This may seem a little off topic, but my guess is that this is an issue with the form being rendered using one controller (new) and processed using another (create) or in the case of updating, render using edit handle form using update.
I would argue, IMHO, etc... that the way that cfWheels routes are done leaves some room for improvement. You see in many of the various framework's routing components you can designate a different controller function for POST than your would use for GET. With cfWheels, all calls are handled based on the url, so a GET and a POST would be handled by the same controller if you use the same url (like when a form action is left blank).
This is the interaction as cfwheels does it:
While it is possible to change the way it does it, the documentation and tutorials you'll find seem to prefer this way of doing it.
TL; DR;
The workaround that is available, is to have the form be render (GET:new,edit) and processing (POST:create,update) handled by the same controller function (route). Within the function...
check if the user submitted using POST
if it is POST, run a private function (i.e. handle_create()) that handles the form
within the handle_create() function you can set up all your error checking and create the errors
if the function has no errors, create (or update) the model and optionally redirect to a success page
otherwise return an object/array of errors
make the result error object/array available to view
handle the form creation
In the view, if the errors are present, show them in the form or up top somewhere. Make sure that the form action either points to self or is empty. Giving the submit button a name and value can also help in determining whether a form was submitted.
This "pattern" works pretty well without sessions.
Otherwise you can use the Flash, as that is what it was created for, but you do need to have Sessions working. their use is described here: http://docs.cfwheels.org/docs/using-the-flash and here:http://docs.cfwheels.org/v1.4/docs/flashmessages
but it really is as easy as adding this to your controller
flashInsert(error="This is an error message.");
and this to your view
<cfif flashKeyExists("error")>
<p class="errorMessage">
#flash("error")#
</p>
</cfif>
First of all I am new to this joomla CMS. I have a joomla project. here i have customized the userprofile plugin and added some more fields .
in registration form i need an extra button named "Save for later ". thus my form contains 3 button ( save for later, Register and cancel )
i need to write a javascript function in the onclick event of "save for later button ".
So i have done
In components/com_user/views/registration/tpl/default.php I have created a button as in normal way. and wrote a javascript function call on this
<input type="submit" class="validate" value="Save For Later" name="SaveDraft" onclick="fnSaveDraft()">
At the top of the page i write the function
<script language="javascript" type="text/javascript">
function fnSaveDraft() {
alert('hai');
return false;
}
</script>
But nothing happend
Please advise me
I would like to suggest you to that don't change the core file unless you really needed.You can use the template overridden method for task.For detail go to that link.
How to override the output from the Joomla! core.
And for your problem your are using the input type as submit that why your form will submitted and your function was not call. You can use type as button then your task will be done.Replace your input field with this.
<input type="button" class="validate" value="Save For Later" name="SaveDraft" onclick="fnSaveDraft()">
I've gotten it into my head that mobile applications don't like form submits the same way html does, so I thought I'd better have a sanity check on Stackoverflow.
For example, instead of having <input type="submit"...>, it looks like I should now use <a data-role="button"...>
Q: Can I continue to use <input type="submit"...> for mobile applications?
The reason why I ask is because the action page has some logic, such as:
<cfif structKeyExists(form,"Save")>
jQuery Mobile, at least as of this writing, by default submits forms via AJAX using the method specified on the form being submitted. POST submissions will still be posted to the server in the background, so ColdFusion will still see the form variables that are passed in as usual. When a response is generated, jQuery Mobile will take the response and transition the view over to whatever HTML was returned. In my own testing you can continue to use a normal submit button as well. If you want a standard submission rather than an AJAX submission, add data-ajax="false" to the form tag.
If you want to programatically submit a form, set the data-ajax attribute for the form to false and then set an event handler for the submit event for the form:
<form data-ajax=false></form>
$(function () {
$('form').bind('submit', function (event) {
event.preventDefault();
$.post('path/to/server.file', $(this).serialize(), function (data) {
alert('Server Response: ' + data);
});
});
});
I have a web page where the user enters some data and then clicks a submit button. I process the data and then use the same Django template to display the original data, the submit button, and the results. When I am using the Django template to display results, I would like the page to be automatically scrolled down to the part of the page where the results begin. This allows the user to scroll back up the page if she wants to change her original data and click submit again. Hopefully, there's some simple way of doing this that I can't see at the moment.
It should already work if you provide a fragment identifier in the action method of the form:
<form method="post" action="/your/url#results">
<!-- ... -->
</form>
and somewhere below the form, where you want to show the results:
<div id="results">
<!-- your results here -->
</div>
This should make the page jump to the <div> with ID results.
It is complete client site and does not involve Django, JavaScript or similar.
You need to wrap your data into something like this:
<div id="some-id">YOUR DATA TO BE DISPLAYED</div>
and if you make redirect in your view you need to redirect to url: /some-url/#some-id
if you don't make redirect you need to scroll to the bottom using javascript (but note that redirect is preffered way to use in view after saving data).