Map<string,list<product2>> use in visual force page to display records

Hi All,

I am trying to display Product2 record based on product family and on selection of particular family want to prepopulate few fields like product family opportunity etc to a custom object edit detail page. i did some programing but getting the following error

Map key null not found in map
Error is in expression '{!map_productfamily[allpr]}' in component <apex:pageBlockTable> in page qualification

My code
VF
<apex:page id="p" standardcontroller="Qualification__c" extensions="Qualification" standardStylesheets="true" tabStyle="Qualification__c">

<apex:form id="frm">

<apex:pageblock id="allprods" title="Available Products" rendered="{!bool_nshow}">
               <apex:pageblocktable id="allprods" value="{!map_productfamily}" var="allpr">
                   
                    <apex:repeat value="{!map_productfamily[allpr]}" var="allpro" >
                    <apex:column headervalue="Product Family" rowspan="">
                        <apex:outputfield value="{!allpro.Product_Family__c}">
                    </apex:outputfield></apex:column>

                    <apex:column headervalue="Segment">
                        <apex:outputfield value="{!allpro.Segment__c}">
                    </apex:outputfield></apex:column>
                    <apex:column headervalue="Sub Segment">
                        <apex:outputfield value="{!allpro.Sub_Segment__c}">
                    </apex:outputfield></apex:column>

                    <apex:column headervalue="Active">
                        <apex:outputfield value="{!allpro.IsActive}">
                    </apex:outputfield></apex:column>
                    </apex:repeat>

                </apex:pageblocktable>

    <apex:actionStatus id="reload" style="align:center;" >
        <apex:facet name="start">
            <apex:image value="/img/loading.gif" title="Processing..."/>
        </apex:facet>
        <apex:facet name="stop"></apex:facet>
    </apex:actionStatus>

</apex:pageblock>

<apex:pageblock id="selectprods" title="Products available Under selected Family" rendered="{!bool_show}">
               <apex:pageblocktable id="allprods" value="{!list_pp}" var="allpro">
                   

                    <apex:column headervalue="Product Name">
                        <apex:outputfield value="{!allpro.Name}">
                    </apex:outputfield></apex:column>

                    <apex:column headervalue="Segment">
                        <apex:outputfield value="{!allpro.Segment__c}">
                    </apex:outputfield></apex:column>
                    <apex:column headervalue="Sub Segment">
                        <apex:outputfield value="{!allpro.Sub_Segment__c}">
                    </apex:outputfield></apex:column>

                    <apex:column headervalue="Active">
                        <apex:outputfield value="{!allpro.IsActive}">
                    </apex:outputfield></apex:column>


                </apex:pageblocktable>


     <apex:actionStatus id="disablebtn">
     <apex:facet name="stop">
           <apex:commandButton value="Back" onClick="BackActionFunc();" status="disablebtn" disabled="false" reRender="disablebtn"/>
     </apex:facet>
     <apex:facet name="start">
      <apex:commandButton value="Processing..." onClick="BackActionFunc();" status="disablebtn" disabled="true" reRender="disablebtn"/>                </apex:facet>
    </apex:actionStatus>


    <apex:actionStatus id="reload" style="align:center;" >
        <apex:facet name="start">
            <apex:image value="/img/loading.gif" title="Processing..."/>
        </apex:facet>
        <apex:facet name="stop"></apex:facet>
    </apex:actionStatus>



</apex:pageblock>
<apex:actionFunction name="BackActionFunc" action="{!setBoolean}" rerender="frm,allprods,selectprods" />

</apex:form>
</apex:page>

Apex:

/************************************************************************************
Opportunity Product field mapping during new qualification creation
Created By:Pravin
Created Date:10/06/2014
*************************************************************************************/
global class Qualification{
    private list<OpportunityLineItem> list_opplineitem;
    public list<Product2> list_product{get;set;}
    public boolean bool_show{get;set;}
    public boolean bool_nshow{get;set;}
    public list<Product2> list_pp{get;set;}
    public map<string,list<Product2>> map_productfamily=new map<string,list<Product2>>();
    public map<string,list<Product2>> getmap_productfamily(){
        return map_productfamily;
    }
    string str_oppname;
    Id opidd;
    set<Id>    set_prodid=new set<Id>();
    public Qualification(ApexPages.StandardController controller) {
    bool_show=false;
    bool_nshow=true;
    system.debug('>>contbool_nshow>>>>'+bool_nshow);
    list_opplineitem= [SELECT Id,Product2Id FROM OpportunityLineItem
                   WHERE OpportunityId = :ApexPages.currentPage().getParameters().get('oppid')];
                   system.debug('????'+list_opplineitem);

    str_oppname=[select id,name from opportunity where id = :ApexPages.currentPage().getParameters().get('oppid')].Name;
    opidd= ApexPages.currentPage().getParameters().get('oppid');

    /*******************************************************************/
        for(OpportunityLineItem ol: list_opplineitem){
            set_prodid.add(ol.Product2Id);
        }
        list_product=[select Id,Name,Product2.Family,Product_Family__r.Name,Product_Family__c,IsActive,Segment__c,Sub_Segment__c from Product2 where id IN:set_prodid/* order by Product2.Family ASC*/];
        system.debug('>>>'+list_product);
        for(product2 pp:list_product){
        if(pp.Product_Family__r.Name!=null && pp.Product_Family__r.Name!=''){
            if(map_productfamily.containskey((string)pp.Product_Family__r.Name)){
                list<Product2> temp_p=map_productfamily.get(pp.Product_Family__r.Name);
                temp_p.add(pp);
                map_productfamily.remove(pp.Product_Family__r.Name);
                map_productfamily.put((string)pp.Product_Family__r.Name,temp_p);
            }
            else{

                map_productfamily.put((string)pp.Product_Family__r.Name,new list<product2>{pp});
            }
        }

        }

    /*********************************************************************/

    //if(list_opplineitem.size()>0)
    //findproductfamily(list_opplineitem);

    }

    public void findproductfamily(list<OpportunityLineItem> list_litem){

        for(OpportunityLineItem ol: list_litem){
            set_prodid.add(ol.Product2Id);
        }
        list_product=[select Id,Name,Product2.Family,Product_Family__c,IsActive,Segment__c,Sub_Segment__c from Product2 where id IN:set_prodid/* order by Product2.Family ASC*/];
        system.debug('>>>'+list_product);

    }

   Public pagereference selectprod(){
        system.debug('>>>>>>');
        string fmlyname;
        string segname;
        string subsegname;
        Id fmlyid;
        Id segid;
        Id subsegid;
        String selproductid = System.currentPagereference().getParameters().get('prodid');
        system.debug('>>>>>>'+selproductid);
        list<Product2> pp=[select Product2.Family,Product_Family__c,Product_Family__r.Name,Sub_Segment__c,Sub_Segment__r.Name,Segment__c,Segment__r.Name,IsActive from Product2 where Id=:selproductid];
        if(PP.size()>0){
            fmlyid=pp[0].Product_Family__c;
            fmlyname=pp[0].Product_Family__r.Name;
            segid=pp[0].Segment__c;
            segname=pp[0].segment__r.Name;
            subsegid=pp[0].Sub_Segment__c;
            subsegname=pp[0].sub_segment__r.Name;
        }
        PageReference newocp = new PageReference('/a0X/e?CF'+system.Label.Id_of_Opportunity_field_on_Qualification+'='+str_oppname+'&CF'+system.Label.Id_of_Opportunity_field_on_Qualification+'_lkid='+opidd+'&CF'+system.Label.Id_of_Product_Family_field_on_Qualification+'='+fmlyname+'&CF'+system.Label.Id_of_Product_Family_field_on_Qualification+'_lkid='+fmlyid+'&CF'+system.Label.Id_of_Segment_field_on_Qualification+'='+segname+'&CF'+system.Label.Id_of_Segment_field_on_Qualification+'_lkid='+segid+'&CF'+system.Label.Id_of_Sub_Segment_field_on_Qualification+'='+subsegname+'&CF'+system.Label.Id_of_Sub_Segment_field_on_Qualification+'_lkid='+subsegid+'&retURL=/apex/Qualification?oppid='+ApexPages.currentPage().getParameters().get('oppid')+'');
        newocp.setRedirect(true);
        return newocp;
   }

    Public void selectprodfam(){

        bool_show=true;
        bool_nshow=false;

        system.debug('>>fambool_nshow>>>>'+bool_nshow);
        String selproductid = System.currentPagereference().getParameters().get('prodid');
        Product2 pp=[select Product2.Family,Product_Family__c,Product_Family__r.Name,Sub_Segment__c,Sub_Segment__r.Name,Segment__c,Segment__r.Name from Product2 where Id=:selproductid limit 1];
       list_pp=[select Name,Product2.Family,Product_Family__c,Product_Family__r.Name,Sub_Segment__c,Sub_Segment__r.Name,Segment__c,Segment__r.Name,IsActive from Product2 where Product_Family__c=:pp.Product_Family__c And id IN:set_prodid];

   }

   public Pagereference setBoolean(){
       system.debug('>>setbool_nshow>>>>'+bool_nshow);
       bool_nshow=true;
        bool_show=false;
        PageReference returl = new PageReference('/apex/Qualification?oppid='+opidd);
        returl.setRedirect(true);
        return returl;
   }

webservice static string findLineItem(Id oppid){
list<Opportunitylineitem> list_opplineitem=[select id from Opportunitylineitem where OpportunityId =: oppid];
system.debug('>>>>>>'+list_opplineitem);
if(list_opplineitem.size()>0){
return 'true';
}
else
return 'false';

}

}

looking for a quick reply on this.

October 9, 2014
·
Answer
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Shashikant Sharma
First you could remove this statement :

map_productfamily.remove(pp.Product_Family__r.Name);

when you put any value to map it overwrites the value for key.

To fix the issue try this :

map_productfamily.put((string)pp.Product_Family__r.Name,temp_p);

put a null check over it that :

if( (string)pp.Product_Family__r.Name != null ) {
map_productfamily.put((string)pp.Product_Family__r.Name,temp_p);
}

put this check to all places where you are filling the map.

October 12, 2014
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Map<string,list<product2>> use in visual force page to display records

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