Question

Dynamic column names in cfloop from cfquery

Asked by: chief8215

Trying to dynamically display a DB table from query at top of script.  If I remove one of the elements from the query I want the table to alter on the web page.  

Just not sure what to put in place of the #?????# I would think if would some thine like qdata.columnName

But I cannot get anything to work.

<cfquery datasource="#variables.datasource#" name="qdata">
	SELECT uid,first,last,email,dorm,created FROM #variables.table#
</cfquery>
 
 
 
<cfoutput>
 
<table border="1">
 
<cfloop query="qdata">
    <tr>
    	
//This needs to be some type of loop for each element base on  the above SQL query.
        <td>#?????#</td>
        
	</tr>   
</cfloop>
</tr>
 
</table>
</cfoutput>

                                  
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Asked On
2008-12-02 at 11:09:20ID23950807
Tags

Cold Fusion 8

Topic

ColdFusion Application Server

Participating Experts
2
Points
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Answers

 

by: black0psPosted on 2008-12-02 at 11:27:22ID: 23079928

This just loops through the column list of the query.

<tr>
<cfloop list="#qdata.columnlist#" index="i">
<th>#i#</th>
</cfloop>
</tr>
<cfloop query="qdata">
<tr>
<cfloop list="#qdata.columnlist#" index="i">
//This needs to be some type of loop for each element base on  the above SQL query.
<td>#qdata[i]#</td>
</cfloop>    
</tr>  
</cfloop>
                                              
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by: chief8215Posted on 2008-12-02 at 11:53:25ID: 23080156

There is an error in this code

 Complex object types cannot be converted to simple values.
The expression has requested a variable or an intermediate expression result as a simple value, however, the result cannot be converted to a simple value. Simple values are strings, numbers, boolean values, and date/time values. Queries, arrays, and COM objects are examples of complex values.

The most likely cause of the error is that you are trying to use a complex value as a simple one. For example, you might be trying to use a query variable in a cfif tag.
 
The error occurred in D:\Inetpub\wwwroot\sgordon\admin\index.cfm: line 26

24 : <cfloop list="#qdata.columnlist#" index="i">
25 :
26 : <td>#qdata[i]#</td>
27 : </cfloop>    
28 : </tr>  

 

by: Jones911Posted on 2008-12-02 at 12:16:43ID: 23080355

Use result aswell as name in the cfquery

<cfquery name="q" datasource="test" result="qR">
	select *
	from z
</cfquery>
<cfoutput>
<table border="1">
	<tr>
	<cfloop list="#qR.columnlist#" index="i">
	<th>#i#</th>
	</cfloop>
	</tr>
	<cfloop query="q">
		<tr>
			<cfloop list="#qR.columnlist#" index="j">
			 	<td>#q['firstName'][q.currentRow]#</td>
			</cfloop>    
		</tr>  
	</cfloop>
</table>
</cfoutput>

                                              
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by: Jones911Posted on 2008-12-02 at 12:19:34ID: 23080381

Sorry I slipped change this:

<td>#q['#j#'][q.currentRow]#</td

<cfquery name="q" datasource="test" result="qR">
	select *
	from z
</cfquery>
<cfoutput>
<table border="1">
	<tr>
	<cfloop list="#qR.columnlist#" index="i">
	<th>#i#</th>
	</cfloop>
	</tr>
	<cfloop query="q">
		<tr>
			<cfloop list="#qR.columnlist#" index="j">
			 	<td>#q['#j#'][q.currentRow]#</td>
			</cfloop>    
		</tr>  
	</cfloop>
</table>
</cfoutput>

                                              
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by: black0psPosted on 2008-12-02 at 16:07:09ID: 23082171

Thanks for fixing the answer I gave. I missed the currentrow.

20120131-EE-VQP-002

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