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Populate a select from a previous selected option

New Here ,
Sep 13, 2017 Sep 13, 2017

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Hi,

I use coldfusion but i'm no expert i'm trying to populate 3 select field from a previous selection its year/vendor/model of cars to find the appropriate tire size.

I manage to find some code to make the first 2 to load but the 3rd one the model doesnt work here is my code what M I missing or doing wrong ?

<!DOCTYPE html>

    <head>

    <title>losd list test</title>

<CFQUERY NAME="getyear" datasource="dataname">

SELECT DISTINCT year

FROM carmodels

order by year DESC

</cfquery>

<cfset Start = 1>

<cfset Start2 = 1>

<cfset Start3 = 1>

<cfset End = getyear.recordcount>

<script language="javascript">

/*Fonction addLoadEvent  */

function addLoadEvent(func) {

  var oldonload = window.onload;

  if (typeof window.onload != 'function') {

    window.onload = func;

  } else {

    window.onload = function() {

      if (oldonload) {

        oldonload();

      }

      func();

    }

  }

}

/*Define the options*/

var tab1 = new Array("Sélectionner une année", <cfloop query = "getyear" startRow = "#Start#" endRow = "#End#"><CFOUTPUT>"#year#"<CFIF getyear.currentRow EQ #end#><CFELSE>, </CFIF></CFOUTPUT></cfloop>);

var tab2 = new Array();

tab2["year"] = new Array("Marque");

<cfloop query = "getyear" startRow = "#Start2#" endRow = "#End#"><CFOUTPUT><cfset lannee = '#year#'>tab2["#year#"] = new Array("Sélectionner une marque" <CFQUERY NAME="getvendor" datasource="dataname">SELECT DISTINCT vendor FROM carmodels WHERE year = '#lannee#' ORDER by vendor</cfquery><cfset End3 = getvendor.recordcount><cfloop query = "getvendor" startRow = "#Start2#" endRow = "#End3#">, "#getvendor.vendor#"</cfloop>);</CFOUTPUT></cfloop>

var tab3 = new Array();

tab3["vendor"] = new Array("Model");

<cfloop query = "getvendor" startRow = "#Start3#" endRow = "#End#"><CFOUTPUT><cfset levendor = '#vendor#'>tab3["#vendor#"] = new Array("Sélectionner un modèle" <CFQUERY NAME="getmodel" datasource="dataname">SELECT DISTINCT model FROM carmodels WHERE vendor = '#levendor#' AND year = #lannee# ORDER by model</cfquery><cfset End4 = getmodel.recordcount><cfloop query = "getmodel" startRow = "#Start3#" endRow = "#End4#">, "#getmodel.model#"</cfloop>);</CFOUTPUT></cfloop>

/*The function to load the list*/

<!------  SELECT  1 ----------------->

function loadList1() {

    var list1 = document.getElementById("list1");

    for (var i = 0; i < tab1.length; i++) {

        var item = document.createElement('option');

        item.value = tab1;

        item.innerHTML = tab1;

      

        if (i == 0) {

            item.selected = true;

        }

      

        list1.appendChild(item);

    }

  

    if (tab1.length > 0) {

        loadList2(tab1[0]);

    }

}

<!------  SELECT  2 ----------------->

function loadList2(list1Value) {

    var list2 = document.getElementById("list2");

    var toDelete = list2.childNodes;

    var tab = tab2[list1Value];

      

    while (list2.hasChildNodes()) {

        list2.removeChild(toDelete[0]);

    }

      

    if (tab) {

        for (var i = 0; i < tab.length; i++) {

            var item = document.createElement('option');

            item.value = tab;

            item.innerHTML = tab;

            list2.appendChild(item);

        }

        list2.disabled = false;

    }

    else {

        list2.disabled = true;

    }

}

<!------  SELECT  3 ----------------->

function loadList3(list2Value) {

    var list3 = document.getElementById("list3");

    var toDelete = list3.childNodes;

    var tab = tab3[list2Value];

      

    while (list3.hasChildNodes()) {

        list3.removeChild(toDelete[0]);

    }

      

    if (tab) {

        for (var i = 0; i < tab.length; i++) {

            var item = document.createElement('option');

            item.value = tab;

            item.innerHTML = tab;

            list3.appendChild(item);

        }

        list3.disabled = false;

    }

    else {

        list3.disabled = true;

    }

}

</script>

    </head>

    <body>

      

<form action="search.cfm" method="post">

<script type="text/javascript">addLoadEvent(loadList1);</script><select id="list1" name="year" style="width: 180px;" onChange="loadList2(this.value);"></select>

<!---- Here i get all the years and its working --->

<select id="list2" name="vendor" style="width: 180px;"  onChange="loadList3(this.value);"></select>

<!---- the list3.disabled = true; is activated and the field is grey out once I select a year the vendor list appears  GREAT --->

<select id="list3" name="Model" style="width: 180px;"></select>

<!---- the list3.disabled = true; is not activated and once i select a vendor it stays empty and  the list3.disabled = true; comes in fonction and the field is greyed out--->

</form>

  

    </body>

</html>

Thank you in advence for your help

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correct answers 1 Correct answer

Community Expert , Sep 20, 2017 Sep 20, 2017

Next tips:

1) ensure that the annee database column is of integer type.

2) change the initialization code <cfset anneeArray[1][1]=""> to <cfset anneeArray[1][1]="0">

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New Here ,
Sep 21, 2017 Sep 21, 2017

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You are right Bkbk, because i have been looking for this kind of code for a few days before i asked here. So here is the woking one i added a 4th select box for the options and it is working perfectly. Keep in mind that the sitepneus in the CFC bind was a test directory I was using. The database was for a car and tire match :

year/vendor/model/modification

2016/Acura/RDX/3.0i

the search-result.cfm is a simple page to see if i was getting the proper tire size for a specific car.

************************************

CFM main page

************************************

<html>

<head>

<title>Car search</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

</head>

<body>

<cfform action="search-result.cfm" method="post">

<table>

    <tr>

        <td>Select Year :</td>

        <td><cfselect name="year"

                bind="cfc:sitepneus.cars.getyear()"

                bindonload="true" /></td>

    </tr>

    <tr>

        <td>Select Vendor:</td>

        <td><cfselect name="vendor"

        bindOnLoad="false"

                bind="cfc:sitepneus.cars.getVendor({year})" /></td>

    </tr>

    <tr>

        <td>Select Model:</td>

        <td><cfselect name="model"

        bindOnLoad="false"

                bind="cfc:sitepneus.cars.getModel({year},{vendor})" /></td>

    </tr>

    <tr>

        <td>Select option:</td>

        <td><cfselect name="modification"

        bindOnLoad="false"

                bind="cfc:sitepneus.cars.getoption({year},{vendor},{model})" /></td>

    </tr>

</table>

<input type="Submit" value="Search">

</cfform>

</body>

</html>

************************************

CFC

************************************

<cfcomponent>

<cfset this.dsn = "MyDate">

<cfprocessingdirective pageEncoding="utf-8">

<!--------------- year ----------->

<cffunction name="getyear" access="remote" returntype="array">

    <cfset var yearQry = "">

    <cfquery name = "yearQry" dataSource = "#THIS.dsn#">

    SELECT DISTINCT year

    FROM tx_carmodels

    order by year DESC

    </cfquery>

    <!--- Values for the first - the default - select option --->

    <cfset yearArray[1][1]="">

    <cfset yearArray[1][2]="Select a year">

    <cfloop query="yearQry">

    <cfset yearArray[currentrow+1][1]=yearQry.year>

    <cfset yearArray[currentrow+1][2]=yearQry.year>

    </cfloop>

    <cfreturn yearArray>

</cffunction>

<!--------------- Vendor / Make ----------->

<cffunction name="getVendor" access="remote" returntype="array">

    <cfargument name="yr" required="true" type="string">

    <cfset var vendorQry = "">

    <cfset var vendorArray = arrayNew(2)>

    <cfquery name = "vendorQry" dataSource = "#THIS.dsn#">

    SELECT DISTINCT vendor

    FROM tx_carmodels

    WHERE year = '#arguments.yr#'

    order by vendor  

    </cfquery>

    <!--- Values for the first - the default - select option --->

    <cfset vendorArray[1][1]="">

    <cfset vendorArray[1][2]="Select a vendor">

    <cfloop query="vendorQry">

    <cfset vendorArray[currentrow+1][1]=vendorQry.vendor>

    <cfset vendorArray[currentrow+1][2]=vendorQry.vendor>

    </cfloop>

    <cfreturn vendorArray>

</cffunction>

  <!--------------- Model ----------->

<cffunction name="getModel" access="remote" returntype="array">

    <cfargument name="yr" required="true" type="string">

    <cfargument name="vendor" required="true" type="string">

    <cfset var modelQry = "">

    <cfset var modelArray = arrayNew(2)>

    <cfquery name = "modelQry" dataSource = "#THIS.dsn#">

    SELECT DISTINCT model

    FROM tx_carmodels

    WHERE year = '#arguments.yr#' AND vendor = '#arguments.vendor#'

    order by model 

    </cfquery>

    <!--- Values for the first - the default - select option --->

    <cfset modelArray[1][1]="">

    <cfset modelArray[1][2]="Select a model">

    <cfloop query="modelQry">

    <cfset modelArray[currentrow+1][1]=modelQry.model>

    <cfset modelArray[currentrow+1][2]=modelQry.model>

    </cfloop>

    <cfreturn modelArray>

</cffunction>

<!--------------- options ----------->

<cffunction name="getOption" access="remote" returntype="array">

    <cfargument name="yr" required="true" type="string">

    <cfargument name="vendor" required="true" type="string">

    <cfargument name="model" required="true" type="string">

    <cfset var optionQry = "">

    <cfset var optionArray = arrayNew(2)>

    <cfquery name = "optionQry" dataSource = "#THIS.dsn#">

    SELECT DISTINCT modification

    FROM tx_carmodels

    WHERE year = '#arguments.yr#' AND vendor = '#arguments.vendor#' AND model = '#arguments.model#'

    order by modification

    </cfquery>

    <!--- Values for the first - the default - select option --->

    <cfset optionArray[1][1]="">

    <cfset optionArray[1][2]="Select an option">

    <cfloop query="optionQry">

    <cfset optionArray[currentrow+1][1]=optionQry.modification>

    <cfset optionArray[currentrow+1][2]=optionQry.modification>

    </cfloop>

    <cfreturn optionArray>

</cffunction>

</cfcomponent>

************************************

CFM search-result.cfm

************************************

<html>

    <head>

    <title>Tire Result</title>

    <cfquery name = "getcar" dataSource = "MyData">

    SELECT *

    FROM tx_carmodels

    WHERE year = #year# AND vendor = '#vendor#' AND model = '#model#'

    </cfquery>

    <cfquery name = "gettires" dataSource = "MyData">

    SELECT *

    FROM tyrespecifications

    WHERE carmodel = #getcar.id#

    </cfquery>

    </head>

    <body>

<table>

<cfoutput query="gettires">

<tr>

<td>#Spectype#</td>

<td>#front_width#/#front_profile#R#front_diameter#</td>

</tr>

</cfoutput>

</table>

    </body>

</html>

To make it clearer Spectype was Default or Alternative. the rest was tire size #front_width#/#front_profile#R#front_diameter# in this case for

year/vendor/model/modification

2016/Acura/RDX/3.0i

would be :

DEFAULT235/60R18
ALTERNATIVE235/55R19
ALTERNATIVE255/50R19
ALTERNATIVE255/45R20

Thanks BKBK

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