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Coldfusion: How to submit a form if all the check boxes are unchecked?

Posted on 2016-09-08
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Last Modified: 2016-09-28
I have a form with a few checkboxes. When submitting without checking at least one checkbox a error happens.   How to submit a form if all the check boxes are unchecked? Thanks.
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Question by:Member_2_7971128
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3 Comments
 
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Accepted Solution

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gdemaria earned 2000 total points (awarded by participants)
ID: 41789838
Use cfparam to give it a default value
At the top of your action page, put this for each checkbox:

<cfparam name="form.xxxx" default="">

where xxxx is the name of your input tag for your checkbox.  
This is needed because a checkbox does not send a form variable when it is not checked.   This creates the variable if it does not exist.  If the variable exists, this does nothing
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by:Gurpreet Singh Randhawa
ID: 41791469
well what @gde has is correct, another way is you can just use the following in your checkboxes to make it work,

<cfsetting showdebugoutput="false">
<form id="form' name="form">
<input type="checkbox" id="Checkbox1" value = "1" />
<input type="checkbox" id="Checkbox2" value = "2" />
<input type="checkbox" id="Checkbox3" value = "3" />
<input type="checkbox" id="Checkbox4" value = "4" />
<input type="button" id="demo" value = "Demo" />
</form>

<script type = "text/javascript" src = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
    $(document).ready(function() {
		$(document).on("click", "#demo", function () {
			$("input:checkbox:not(:checked)").each(function () {
				$('<input>').attr({type: 'text',id: $(this).attr("id"),name: $(this).attr("id"),value: $(this).val()}).appendTo('form');
				//alert("Id: " + $(this).attr("id") + " Value: " + $(this).val());
			});
		});
	});
</script>

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for this $('<input>').attr({type: 'text', you can make it use $('<input>').attr({type: 'hidden',
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LVL 39

Expert Comment

by:gdemaria
ID: 41819428
Best practice to simply provide a value if none is passed.
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