i am trying to processing a form in lift frame work. my form is having one checkbox and radiobuttons. how could i check whether the checkbox is checked or not and the selected radio button.the following code i used to get other elements value.
the view:
<form class="lift:MySnippet?form=post">
From:<input type="text" name="source" /><br />
To: <input type="text" name="destination" /><br />
Age: <input type="text" name = "age"/><br />
Return: <input type="checkbox" name="needreturn" value="Return Ticket" /><br />
<input type="radio" name="sex" value="male" />Male<br />
<input type="radio" name="sex" value="male" />Female<br />
<input type="submit" value="Book Ticket"/>
</form>
and MySnippet scala code is:
object MySnippet {
def render = {
var from = ""
var to = ""
var age = 0
def process() {
S.notice("in process function")
}
"name=source" #> SHtml.onSubmit(from = _) &
"name=destination" #> SHtml.onSubmit(to = _) &
"name=age" #> SHtml.onSubmit(s => asInt(s).foreach(age = _)) &
"type=submit" #> SHtml.onSubmitUnit(process)
}
}
in this how could i process the checkbox and radio button. can anyone help me...thanx in advance.
Do you need to specify the choices in your HTML? If not, the easiest way is:
Return: <input type="checkbox" name="needreturn" /><br />
Sex: <input type="radio" name="sex" />
and the CSS Transform:
val radioChoices = List("male", "female")
var sex:Box[String] = None
var needReturn:Boolean = false
"#sex" #> SHtml.radio(radioChoices, sex, (resp) => sex = Full(resp)) &
"#needreturn" #> SHtml.checkbox(needReturn, (resp) => needReturn = resp)
You could replace SHtml.radio with SHtml.ajaxRadio and SHtml.checkbox with SHtml.ajaxCheckbox if you want your selection to be sent to the server every time the value is changed, instead of when the form is submitted
I believe you can also use the SHtml.onSubmit as you do above for the checkbox and radio, but I'd have to do some testing to figure out exactly how.
With regards to the radio button, you can find some information about changing the way the label is output here if you need to: https://groups.google.com/forum/?fromgroups=#!topic/liftweb/rowpmIDbQAE
Use SHtml.checkbox, SHtml.radio
By the way, the <input>-s should be SHtml.text, I think. So, they're not buttons -- they're inputs. Don't forget to check the resulting html in the web page with firebug. (You'd see that using the current code you have input=text deleted.)
Related
So im making this inventory website, so the forklift drivers can add or remove weight from our inventory we measure our products in weight.
So basically I need to be able to fetch the weight (in kg) from mongo db and add it to it and save it
//edit
the problem I'm having is the current code is returning "NaN kg" in html
kg is defined by a number inserted into the db and i cant seem to get the kg value without my code running into a error
The Html
<form class="add-pro">
<input type="text" class="form-control" name="namn" required="true" placeholder="Produkt Name"/>
<br />
<input type="text" class="form-control" name="id" required="true" placeholder="Produkt code"/>
<br />
<input type="number" class="form-control" placeholder="KG" name="kg" />
<input id="btnModal" type="submit" value="add" class="btn btn-primary"/>
</form>
<form class="add-data">
<input type="number" class="form-control" id="add-data-control" name="g" placeholder="how much">
<button class="glyphicon glyphicon-plus" type="submit" id="add-data-plus" aria-hidden="true"></button>
</form>
Javascript
"submit .add-data": function(event){
var g = event.target.g.value;
var x = produkter.find().fetch();
var k = kg;
produkter.update(this._id, {$set: {kg: +k + +g }});
},
Template.produkter.events({
"submit .add-pro": function(event){
var namn = event.target.namn.value;
var id = event.target.id.value;
var kg = event.target.kg.value;
produkter.insert({
namn: namn,
id: id,
kg: kg
});
return false;
},
There are a few problems with your code, see comments:
"submit .add-data": function(event){
var g = event.target.g.value;
var x = produkter.find().fetch();
// Where is kg defined?
var k = kg;
// The expression +k + +g does not compute - do you mean k+g ?
produkter.update(this._id, {$set: {kg: +k + +g }});
},
You may also be running into trouble with strings versus numbers. Even though your HTML input tag says type="number", the value will be a string, and will need to be converted to a number before saving it to the database.
I suspect you are also intending to save the value as something like "2.7 kg", which is useful for displaying the weight, but it's a bad idea, because if you do that you will need to strip off the " kg" every time you want to calculate a new value.
I have a simple AddUser component and in the render function I am returning the following html:
<form ref="form" className="users-form" onSubmit={ this.handleAddNew }>
<input ref="username" type="text" name="username" placeholder="username"
value={this.state.username} onChange={function() {}} /><br />
<input ref="email" type="email" name="email" placeholder="email"
value={this.state.email} onChange={function() {}} /><br />
<button type="submit"> Add User </button>
</form>
I am binding the state of username and email to this.state which I am setting to blank in getInitialState like so:
getInitialState() {
return { username: '', email: '' };
}
I am binding state to the form so I can set it to blank after form submission.
The problem with this setup is that the form now renders as readonly.
I cannot get any user input into either text fields. What am I doing wrong?
Your input fields are controlled components, since you are using the value property. This makes the inputs readonly and they will always reflect the value, the variable (in this case, the state variable) holds. You have to explicitly setState onChange since you are setting username field as a state variable.
Read more about it here
onUserNameChange : function(e){
this.setState({username : e.target.value})
},
render: function(){
return ...
<input ref="username" type="text" name="username" placeholder="username"
value={this.state.username} onChange={this.onUserNameChange} /><br />
...
<button type="submit"> Add User </button>
</form>
}
A better way to do this is :
onChange : function(field,e){
this.setState({field: e.target.value});
},
render : function(){
return <form ref="form" className="users-form" onSubmit={ this.handleAddNew }>
<input ref="username" type="text" name="username" placeholder="username"
value={this.state.username} onChange={this.onChange.bind(this,"username")} /><br />
<input ref="email" type="email" name="email" placeholder="email"
value={this.state.email} onChange={this.onChange.bind(this,"email")} /><br />
<button type="submit"> Add User </button>
</form>
}
It looks like you saw the console warning about controlled fields needing an onChange handler and added one just to shut the warning up :)
If you replace your empty onChange handler functions with onChange={this.handleChange} and add this method to your component, it should work:
handleChange(e) {
this.setState({[e.target.name]: e.target.value})
}
(Or for people not using an ES6 transpiler:)
handleChange: function(e) {
var stateChange = {}
stateChange[e.target.name] = e.target.value
this.setState(stateChange)
}
However, if your component is an ES6 class extending React.Component (instead of using React.createClass()), you will also need to ensure the method is bound to the component instance properly, either in render()...
onChange={this.handleChange.bind(this)}
...or in the constructor:
constructor(props) {
super(props)
// ...
this.handleChange = this.handleChange.bind(this)
}
I'm trying to create a JQM survey with branching questions--i.e. in a survey with questions 1-3, if you choose a particular answer on question 1, a question is dynamically added between questions 1 and 2.
UPDATE: I made an attempt ( https://dl.dropbox.com/u/17841063/site2/index-c1.html#page2 ) that works by matching the value of a radio button to the name of a hidden div--if there's a match, it unhides the div. The problem right now is that if you change your answer back to an option that wouldn't trigger the conditional question, it doesn't re-hide. For example, clicking No or Unsure in question A1 causes question A2 to appear, but if you then click Yes in A1, A2 still remains...
<script type="text/javascript">
// Place in this array the ID of the element you want to hide
var hide=['A2','A4'];
function setOpt()
{
resetOpt(); // Call the resetOpt function. Hide some elements in the "hide" array.
for(var i=0,sel=document.getElementsByTagName('input');i<sel.length;i++)
{
sel[i].onchange=function()
{
if(this.parentNode.tagName.toLowerCase()!='div')
resetOpt(); // Hides the elements in "hide" array when the first select element is choosen
try
{
document.getElementById(this.value).style.display='';
}
catch(e){} ; // When the value of the element is not an element ID
}
}
}
window.addEventListener?window.addEventListener('load',setOpt,false):
window.attachEvent('onload',setOpt);
function resetOpt()
{
for(var i=0;i<hide.length;i++)
document.getElementById(hide[i]).style.display='none'; // Hide the elements in "hide" array
}
</script>
Here's are the radio buttons that use the script above:
<div data-role="fieldcontain">
<fieldset data-role="controlgroup" data-type="horizontal">
<legend>(Question A1) A prominent accident smokes on top of the blessed reactionary?</legend>
<input type="radio" name="aaa" id="aaa_0" value="notA2" />
<label for="aaa_0">Yes</label>
<input type="radio" name="aaa" id="aaa_1" value="A2" />
<label for="aaa_1">No</label>
<input type="radio" name="aaa" id="aaa_2" value="A2" />
<label for="aaa_2">Unsure</label>
</fieldset>
</div>
<div id="A2" data-role="fieldcontain">
<fieldset data-role="controlgroup" data-type="horizontal">
<legend>(Question A2) Does a married composite remainder the shallow whistle??</legend>
<input type="radio" name="bbb" id="bbb_0" value="" />
<label for="bbb_0">Yes</label>
<input type="radio" name="bbb" id="bbb_1" value="" />
<label for="bbb_1">No</label>
<input type="radio" name="bbb" id="bbb_2" value="" />
<label for="bbb_2">Unsure</label>
</fieldset>
</div>
If anyone has ideas about fixing this, or examples of other ways to do branching forms, I'd be very grateful!
Thanks,
Patrick
I played around a little bit with your example, removed all your plain JavaScript and added some jQuery Mobile style script, see working example here
<script>
$("input[type='radio']").bind( "change", function(event, ui) {
var mySelection = $('input[name=aaa]:checked').val();
//alert(mySelection);
if (mySelection == "A2") {
$('#A2').removeClass('ui-hidden-accessible');
} else {
$('#A2').addClass('ui-hidden-accessible');
};
});
</script>
Let say I have a simple form with no required fields:
<form action="index.jsp" method="post">
<input type="text" name="firstName" />
<input type="text" name="lastName" />
<input type="text" name="email" />
<input type="submit" value="submit" />
</form>
I want to check if the form was submitted by checking the submit parameter (because it's always present). In PHP I can do a simple
if ( $_POST['submit'] )
but the request.getParameter("submit") doesn't seem to work.
So what's the best way to check if a form was submitted?
You need to give the input element a name. It's the element's name which get sent as request parameter name.
<input type="submit" name="submit" value="submit" />
Then you can check it as follows:
if (request.getParameter("submit") != null) {
// ...
}
You perhaps also want to check if "POST".equalsIgnoreCase(request.getMethod()) is also true.
if ("POST".equalsIgnoreCase(request.getMethod()) && request.getParameter("submit") != null) {
// ...
}
Better, however, would be to use a servlet and do the job in doPost() method.
You can try this way:-
if ("POST".equalsIgnoreCase(request.getMethod())) {
// Form was submitted.
} else {
// It may be a GET request.
}
This question already has answers here:
Using the HTML5 "required" attribute for a group of checkboxes?
(16 answers)
Closed 6 years ago.
I have a list of checkboxes with the same name attribute, and I need to validate that at least one of them has been selected.
But when I use the html5 attribute "required" on all of them, the browser (chrome & ff) doesn't allow me to submit the form unless all of them are checked.
sample code:
<label for="a-0">a-0</label>
<input type="checkbox" name="q-8" id="a-0" required />
<label for="a-1">a-1</label>
<input type="checkbox" name="q-8" id="a-1" required />
<label for="a-2">a-2</label>
<input type="checkbox" name="q-8" id="a-2" required />
When using the same with radio inputs, the form works as expected (if one of the options is selected the form validates)
According to Joe Hopfgartner (who claims to quote the html5 specs), the supposed behaviour is:
For checkboxes, the required attribute shall only be satisfied when one or more of the checkboxes with that name in that form are checked.
For radio buttons, the required attribute shall only be satisfied when exactly one of the radio buttons in that radio group is checked.
am i doing something wrong, or is this a browser bug (on both chrome & ff) ??
You can make it with jQuery a less lines:
$(function(){
var requiredCheckboxes = $(':checkbox[required]');
requiredCheckboxes.change(function(){
if(requiredCheckboxes.is(':checked')) {
requiredCheckboxes.removeAttr('required');
}
else {
requiredCheckboxes.attr('required', 'required');
}
});
});
With $(':checkbox[required]') you select all checkboxes with the attribute required, then, with the .change method applied to this group of checkboxes, you can execute the function you want when any item of this group changes. In this case, if any of the checkboxes is checked, I remove the required attribute for all of the checkboxes that are part of the selected group.
I hope this helps.
Farewell.
Sorry, now I've read what you expected better, so I'm updating the answer.
Based on the HTML5 Specs from W3C, nothing is wrong. I created this JSFiddle test and it's behaving correctly based on the specs (for those browsers based on the specs, like Chrome 11 and Firefox 4):
<form>
<input type="checkbox" name="q" id="a-0" required autofocus>
<label for="a-0">a-1</label>
<br>
<input type="checkbox" name="q" id="a-1" required>
<label for="a-1">a-2</label>
<br>
<input type="checkbox" name="q" id="a-2" required>
<label for="a-2">a-3</label>
<br>
<input type="submit">
</form>
I agree that it isn't very usable (in fact many people have complained about it in the W3C's mailing lists).
But browsers are just following the standard's recommendations, which is correct. The standard is a little misleading, but we can't do anything about it in practice. You can always use JavaScript for form validation, though, like some great jQuery validation plugin.
Another approach would be choosing a polyfill that can make (almost) all browsers interpret form validation rightly.
To provide another approach similar to the answer by #IvanCollantes.
It works by additionally filtering the required checkboxes by name. I also simplified the code a bit and checks for a default checked checkbox.
jQuery(function($) {
var requiredCheckboxes = $(':checkbox[required]');
requiredCheckboxes.on('change', function(e) {
var checkboxGroup = requiredCheckboxes.filter('[name="' + $(this).attr('name') + '"]');
var isChecked = checkboxGroup.is(':checked');
checkboxGroup.prop('required', !isChecked);
});
requiredCheckboxes.trigger('change');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<form target="_blank">
<p>
At least one checkbox from each group is required...
</p>
<fieldset>
<legend>Checkboxes Group test</legend>
<label>
<input type="checkbox" name="test[]" value="1" checked="checked" required="required">test-1
</label>
<label>
<input type="checkbox" name="test[]" value="2" required="required">test-2
</label>
<label>
<input type="checkbox" name="test[]" value="3" required="required">test-3
</label>
</fieldset>
<br>
<fieldset>
<legend>Checkboxes Group test2</legend>
<label>
<input type="checkbox" name="test2[]" value="1" required="required">test2-1
</label>
<label>
<input type="checkbox" name="test2[]" value="2" required="required">test2-2
</label>
<label>
<input type="checkbox" name="test2[]" value="3" required="required">test2-3
</label>
</fieldset>
<hr>
<button type="submit" value="submit">Submit</button>
</form>
i had the same problem, my solution was apply the required attribute to all elements
<input type="checkbox" name="checkin_days[]" required="required" value="0" /><span class="w">S</span>
<input type="checkbox" name="checkin_days[]" required="required" value="1" /><span class="w">M</span>
<input type="checkbox" name="checkin_days[]" required="required" value="2" /><span class="w">T</span>
<input type="checkbox" name="checkin_days[]" required="required" value="3" /><span class="w">W</span>
<input type="checkbox" name="checkin_days[]" required="required" value="4" /><span class="w">T</span>
<input type="checkbox" name="checkin_days[]" required="required" value="5" /><span class="w">F</span>
<input type="checkbox" name="checkin_days[]" required="required" value="6" /><span class="w">S</span>
when the user check one of the elements i remove the required attribute from all elements:
var $checkedCheckboxes = $('#recurrent_checkin :checkbox[name="checkin_days[]"]:checked'),
$checkboxes = $('#recurrent_checkin :checkbox[name="checkin_days[]"]');
$checkboxes.click(function() {
if($checkedCheckboxes.length) {
$checkboxes.removeAttr('required');
} else {
$checkboxes.attr('required', 'required');
}
});
Here is improvement for icova's answer. It also groups inputs by name.
$(function(){
var allRequiredCheckboxes = $(':checkbox[required]');
var checkboxNames = [];
for (var i = 0; i < allRequiredCheckboxes.length; ++i){
var name = allRequiredCheckboxes[i].name;
checkboxNames.push(name);
}
checkboxNames = checkboxNames.reduce(function(p, c) {
if (p.indexOf(c) < 0) p.push(c);
return p;
}, []);
for (var i in checkboxNames){
!function(){
var name = checkboxNames[i];
var checkboxes = $('input[name="' + name + '"]');
checkboxes.change(function(){
if(checkboxes.is(':checked')) {
checkboxes.removeAttr('required');
} else {
checkboxes.attr('required', 'required');
}
});
}();
}
});
A little jQuery fix:
$(function(){
var chbxs = $(':checkbox[required]');
var namedChbxs = {};
chbxs.each(function(){
var name = $(this).attr('name');
namedChbxs[name] = (namedChbxs[name] || $()).add(this);
});
chbxs.change(function(){
var name = $(this).attr('name');
var cbx = namedChbxs[name];
if(cbx.filter(':checked').length>0){
cbx.removeAttr('required');
}else{
cbx.attr('required','required');
}
});
});
Building on icova's answer, here's the code so you can use a custom HTML5 validation message:
$(function() {
var requiredCheckboxes = $(':checkbox[required]');
requiredCheckboxes.change(function() {
if (requiredCheckboxes.is(':checked')) {requiredCheckboxes.removeAttr('required');}
else {requiredCheckboxes.attr('required', 'required');}
});
$("input").each(function() {
$(this).on('invalid', function(e) {
e.target.setCustomValidity('');
if (!e.target.validity.valid) {
e.target.setCustomValidity('Please, select at least one of these options');
}
}).on('input, click', function(e) {e.target.setCustomValidity('');});
});
});
var verifyPaymentType = function () {
//coloque os checkbox dentro de uma div com a class checkbox
var inputs = window.jQuery('.checkbox').find('input');
var first = inputs.first()[0];
inputs.on('change', function () {
this.setCustomValidity('');
});
first.setCustomValidity( window.jQuery('.checkbox').find('input:checked').length === 0 ? 'Choose one' : '');
}
window.jQuery('#submit').click(verifyPaymentType);
}