I have a dropdown select on my page called language, which is in a form with other elements. When the form is submitted normally (which submits everything), I can access the value of the dropdown with params[:langauge].
I have another link/button on the page which, when clicked, should get the value of language and pass it to the controller. The controller could then run some ajax to change the language on the page. But how do I pass (just) the value of the dropdown through the link?
Update:
Should I get the value with Jquery, or is there a simpler way?
$('select[name="language"]').val()
If that is a link, the only way to use is query string
that link
You can get "href" of that link by JS, and then use this method to update query string.
Then the method will be able to process with correct params.
If that is a button, that would mean a mini form, you can set a hidden field inside the form and use jQuery to update its value. When sent, the controller method will know this value.
This javascript code should update the URL whenever the dropdown value is changed.
$(function() {
$('#link-button').attr("href", "/link_path/" +$(this).val())
$("select#language").change(function() {
$('#link-button').attr("href", "/link_path/" +$(this).val())
});
});
Related
In my Rails application I have a form with radio type inputs and post method. The user selects one of these radio options and submits the form. How could I set the routing such (in routes.rb or in some other way) that the controller would be selected based on the value of the selected input value which is now in the post data. In routes.rb the params hash isn't available, but could I access this data in some other way?
Two options come to my mind:
Use JavaScript to intercept the submit action. On submit, read the value of the selected radio option, change the target attribute of the form to the URL you expect to be used and submit the form.
To make the JavaScript unobtrusive, the URL of the target can be added as a data-target attribute to the radio options. In this way, once you get the selected value, you just replace the form target with the value of data-target. The benefit is that you can generate it server side and you don't have to hard-code the value.
Use an intermediate action. Always submit the form to an action that reads the payload and redirects to the relevant controller action based on the payload value.
is it somehow possible to add an anchor (or hash) to a Struts 2 Action-URL? To be specific:
I have a html form which can be extended with more fields if the user clicks a button "add more fields". This Button sends a html submit to the backend (Action "thismyaction") where a list object is filled with another set of input fields. The action then returns to a tile "thisismyform" which loads the same jsp as before, where the new fieldset is visible.
(Unfortunately there is no way to achieve that via ajax / JS in this project at the time. I know that you usually add fields that way, but i got the project as it is.)
Each fieldset is counted (fieldset-0, if user adds more fields another set is added "fieldset-1"). The sets always contain the same fields, but enumerated.
What happens here? There is a post to the action which generates another fieldset and redirects back to the same page, where it renders all fieldsets. Important: the result type is "tiles"! I guess this is what makes it difficult.
Now I want to dynamically add an anchor to this URL "thisismyaction.do", like e.g. "thisismyaction.do#fieldset-1". Use Case: User adds another fieldset, post to the action => result type="tiles" => JSP, user sees reload of the page with the new, second fieldset and gets "scrolled" to the second fieldset via the anchor. Is that possible?
I hope I could describe it properly, what I want to achieve... If there are questions, feel free to ask.
Simplest way I can think of right away is
<script type="text/javascript">
window.location.hash = "fieldset-<s:text name="latestIdOfFieldSet" />";
</script>
If you can figure out what's gonna be latestIdOfFieldSet before you render your jsp and set it in your action method. you should get what you are trying to do.
I have made an app with jQuery mobile and laravel.
On the first page "mobilepage1" if have a form with a next button.
Also some of the form elements are dropdown menu's. The dropdown select options I get from a table in the database.
In the form on mobilepage1 I have a dropdown list with all department names:
I get this list from my controller like so:
$departmentlist = Company::find($usercompanyid)->departments;
This is how I display the list in the mobilepage1 form:
{{ Form::label('department', 'Department:')}}
<?php
foreach($afdelingslijst as $item) {
$afdelingsarray[$item->afdelingen] = $item->afdelingen;
}
?>
{{Form::select('size',$afdelingsarray)}}
On the second page I want to make a back button.
I tried the jQuery mobile way with a link with: data-rel="back"
But this does not work. I get a page error, it's missing the departmentlist used in mobilepage1. I can make a link to a route to mobilepage1, but I think all the information the user entered in mobilepage1 would be gone.
I see this url in the address bar when I am on mobilepage2 (this is after I filled in the form on mobilepage1 and clicked next).
/public/mobilepage2?size=Personeelszaken&size=32&directechef=Tineke&size=1&size=1&size=1&date-2=&size=1&time=&omschrijving=
Is there a way I can link to the the mobilepage1 route and still keep the information the user entered?
It looks like it would work just by hitting the back button if you passed in the department list with a view composer rather than through a route. Remove it from your route and place this in a file that's being autoloaded...
View::composer('mobilepage2', function($view)
{
$departmentlist = Company::find($usercompanyid)->departments()->lists('afdelingen','afdelingen');
$view->with('departmentlist', $departmentlist);
});
I'm not sure how you are finding $usercompanyid but you should be able to find it within the closure or pass it in by adding use ($usercompanyid) right after the function($view) part.
Also using the lists() function like that will build your array for you so you don't need to worry about the foreach loop in your view.
Since the values are getting passed back and forth as get variables, I think if you use Form::model() instead of Form::open(), it should place all those values back into the input fields for you.
I'm trying to use Ajax in one of my Rails applications to have a form_tag textarea change its contents according to the selected value of a dropdown that is out of that form_tag.
I would like to ask, what is the correct way of handling this ? Is it possible to respond to js in my show action and have a js.rjs ? Do you happen to know of any resources or can offer some insight ?
You should write a javascript, which triggers on the dropdown menu's onchange event, and start an ajax process. With jQuery it is something like this (in your show code within a script tag):
$("#dropdownMenuName").change(function(){
$.get("controller/action.txt", function(data){ $("#textareaName").val(data); } );
});
This simply sends a request to your app on the controller/action.txt action, and the result is pasted into the textarea's text property. Of course you should write the answer as a simple text, as the result is printed in the textarea instantly.
I have this ruby on rails code
<%= builder.select(:serving_size_id, '') %>
I have not specified any options on purpose because I set the options in a different way when the page loads (using jQuery and Ajax).
The question: Is there any way I can get the value from the column "serving_size_id" but not change that line? I have a partial which I use it for new and edit and I think it would be sweet if I can do the setting of the selected index in JS.
Any ideas?
I'm not sure I completely understand your question, but if you want to set the value of the select field with JavaScript, you need to obtain the value in JavaScript at some point. I can think of two ways of doing this:
1) When you get the options via AJAX, have the server indicate which one is selected. This can be done by returning HTML <option> tags with selected="selected" set for one of them. To do this, your AJAX request is going to have to provide information about the object this select field is for (so the server can look up the object's current serving_size_id value).
2) When you render the field in your original partial, also render some JavaScript which sets the current value of the field, for example, underneath what you have above:
<%= javascript_tag "var ssid = '#{builder.object.serving_size_id}';" %>
Then, after the options are retrived via AJAX, the ssid variable is checked and the correct option is selected.
using jQuery in rails is easy but a little more difficult than prototype.
ex: "div id="serving_size" class="nice" rel="<%=h num%>">Stuff Goes Here.../div>"
in application.js do the following:
//application.js
$(document).ready(function(){
if($('#serving_size'){
$('#serving_size').live("mouseover",function(){
//we are hovering over specific div id serving size
if($('#serving_size').hasAttr('rel')){
alert($('#serving_size').attr('rel'); //your dynamic rel value, and fire function
}
}
}
if('.nice'){
$('.nice').live("mouseover",function(){
//we are now hovering over any item on page with class nice
if($(this).hasAttr('rel')){
//we are now using jQuery object ref and finding if that obj has attr rel
alert($(this).attr('rel')); // shows dynamic rel value
}
}
}
});
If you use the above code you should be able to do anything you want and fire any custom code from each of your set event callbacks.
The 'live' function in jQuery is great because it can be called on items that will eventually be on the page (eg. if you fill in something with ajax, jQuery will be prepared for that item being in the page)
I hope this help.