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Populating drop down box with results from mySQL query

Posted on 2008-10-15
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Last Modified: 2012-05-05
I have to tables one is called "make the other is "model"

The make table has a "id"  and "make" field
The model table has "id" "idmake" and "model" field

these tables hold a list of car manufactures and there models.  I have the first drop down box that list all the manufactures.  How do I get the second one to only list there models?

I'm using coldfusion with mysql

Thank you

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Question by:sonicimpulse
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Expert Comment

by:erikTsomik
ID: 22722815
Are you trying to create dependent drop downs ?

<select name='model'>
<cfloop query='queryname'>
   <options value="#id#">#model#</options>
</cfloop>
</select>
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Author Comment

by:sonicimpulse
ID: 22724650
There is two drop down boxes one where they click the manufactures name.  This box has every car manufacture listed in it.  This drop down does work perfectly.

The second box I want to list only the models of cars for what ever manufacture the user picked.  This is the box I can't get to work.

The model table has a field called idmake  This field contains the same number as the id field in the make table.  I wrote it out above.  This is how I can link the tables together.



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LVL 19

Expert Comment

by:erikTsomik
ID: 22724703
you need another query saying that

where idmake=#form.manufactire#
There a custom  tag available
http://projects.nateweiss.com/nwdc/downloads/cf/CF_TwoSelectsRelated.zip

Or
take a look at this
http://www.coldfusionjedi.com/index.cfm/2008/9/14/Triple-Related-Selects-and-interesting-CFDIV-trick
Or you can use javascript
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Author Comment

by:sonicimpulse
ID: 22725283
Maybe this will help.  Below is the code to my list box.  Can I use the onchange to save the ID in a variable.  If so how would I do that?

<select name="ltype" onChange="" >
                            <cfoutput query="qtype">
                              <option value="#id#|#type#" descript="#tdescription#" tabindex="3">#type#</option>
                            </cfoutput>
                          </select>  
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erikTsomik earned 2000 total points
ID: 22725321
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Expert Comment

by:erikTsomik
ID: 22725326
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Author Closing Comment

by:sonicimpulse
ID: 31506346
Thanks for that tutorial.  I got it working perfectly
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LVL 19

Expert Comment

by:erikTsomik
ID: 22735859
thatnks. can you post the code
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