Question

delete records in coldfusion

Asked by: erikTsomik

In my form I have action page, but I want to delete the records using JS, but it will not do anything
SO
My form is  <form action="insertcategory.cfm" method="post" tmt:ajaxform="true" tmt:ajaxformcallback="dsRefresh" name="category" >
And the button is
 <input type="button" name="deleteCategory" id="deleteCategory"  value="Delete Category" onclick="DeleteCategory ();">
And JS is
                              function DeleteCategory () {
                                    
                                    <cfparam name="form.categorylist" default="">
                                    <cfif isDefined("form.deleteCategory") and not isDefined("form.updateCategory") and not isDefined("form.insertCategory")>
                                                <cfquery name="deleteCategory" datasource="HotBanana_Manager">
                                                      delete from trnAcademicProgramCategory where categoryId=#form.categorylist#

                                                      </cfquery>

</cfif>

                              
                              }

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Asked On
2007-10-29 at 13:15:52ID22925405
Tags

coldfusion

,

delete

,

record

,

onclick

Topics

ColdFusion Application Server

,

Cold Fusion Markup Language

,

ColdFusion Studio

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: erikTsomikPosted on 2007-10-29 at 13:24:20ID: 20172972

And also on the delete I do not want to use action page . How can i do that

 

by: mmc98dl1Posted on 2007-10-29 at 13:25:41ID: 20172985

you are mixing 2 languages here that get executed at different stages of the process.

ColdFusion is a server language and gets parsed and executed on the server.

Javascript is a client language and gets parsed and executed on the client machine inside a browser like Internet Explorer.

What you are trying to do here is use ajax to pass data via Javascript back to the server and have ColdFusion do something with it.

With Spry, the cfm page you define in the action attribute of the form is where the ajax will be sent to.

In your case the code that does the delete should be in the 'insertcategory.cfm' page because that is where Spry will push the action to.

You can follow a good tutorial on it here:
http://www.adobe.com/devnet/dreamweaver/articles/edit_data_in_ajax.html

You can view source of the page in your browser too and that will show you that your function DeleteCategory () {} is actually empty. Thats because the ColdFusion code inside the {} was parsed on the server before being passed to the client browser.

HTH

 

by: erikTsomikPosted on 2007-10-29 at 13:29:16ID: 20173020

I agree with you on this on but what I trying to accomplish is to have 3 buttons Update/Delete/Insert can Spry handle this at once

 

by: hieloPosted on 2007-11-06 at 07:30:06ID: 20224632

Once again, you need to remove the CFML from  function DeleteCategory(){} and instead use:
<input type="button" onclick="DeleteCategory();"/>

Then, your DeleteCategory function needs to make an AJAX request to the server, sending the Category to delete. In the process of your AJAX call, make use of a call back function to determine if the request was successful or not!

The true problem with your function definition is that it has CFML, which will get executed on the server and on first page load all the browser will see is an empty function definition. The browser never sees what CFML you have there because the CFML is executed only on the server and sends only the results to the browser, not the CFML. Even if the CF server sent the CFML, the browser would not know to execute it, because CFML is executed by the CF engine, which does not come with browsers!

20120131-EE-VQP-002

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