Field not rendering properly on VF page...

I have developed page to display..object,itsfields,childobjects,relationships and childobjfields

right now i have a problem with to render the child object fields..when we do change in parent objects...
it should render by according to respective child object fields.

Class:

public with sharing class ConfigurationController {

   public Map <String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();
public String selectedObject {get; set;}
public String selectedField {get; set;}
    public String selectedChildobject {get; set;}
    public String selectedchildField {get; set;}
    public String Relationship {get; set;}

Public ConfigurationController(){
selectedObject = 'Account';
selectedChildobject = 'Account';
}

public List<SelectOption> getObjectNames(){
List<SelectOption> objNames = new List<SelectOption>();
List<String> entities = new List<String>(schemaMap.keySet());
entities.sort();
for(String name : entities)
{
objNames.add(new SelectOption(schemaMap.get(name).getDescribe().getName() ,schemaMap.get(name).getDescribe().getLabel() ));
}
return objNames;
    }

    public List<SelectOption> getObjectFields(){
Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();
Schema.SObjectType ObjectSchema = schemaMap.get(selectedObject);
Map<String, Schema.SObjectField> fieldMap = ObjectSchema.getDescribe().fields.getMap();
List<SelectOption> fieldNames = new List<SelectOption>();
for (String fieldName: fieldMap.keySet())
{
fieldNames.add(new SelectOption(fieldMap.get(fieldName).getDescribe().getLabel(),fieldMap.get(fieldName).getDescribe().getLabel()));
}
return fieldNames;
   }

   public List<SelectOption> getRelatedObjects(){
map<string,string> relatedObjectsMap = new map<string,string>();
system.debug('selectedObject :'+selectedObject);
list<Schema.Childrelationship> relatedObjectsList = Schema.getGlobalDescribe().get(selectedObject).getdescribe().getChildRelationships();
system.debug('relatedObjectsList :'+relatedObjectsList);
List<SelectOption> ChildobjNames = new List<SelectOption>();
for (Schema.Childrelationship relatedObject : relatedObjectsList) {
if(relatedObject.getChildSObject().getDescribe().isUpdateable()
&&
relatedObject.getChildSObject().getDescribe().getKeyPrefix()!=null
&&
!relatedObject.getChildSObject().getDescribe().isCustomSetting()
&&
relatedObject.getChildSObject().getDescribe().isCreateable()
)
            ChildobjNames.add(new SelectOption(relatedObject.getChildSObject().getDescribe().getName(),relatedObject.getChildSObject().getDescribe().getLabel()));
            system.debug('ChildobjNames :'+ChildobjNames);
    }
    return ChildobjNames;
}

public List<SelectOption> getRelationships(){
map<string,string> relatedObjectsMap = new map<string,string>();
system.debug('selectedObject :'+selectedObject );
list<Schema.Childrelationship> relatedObjectsList = Schema.getGlobalDescribe().get(selectedObject).getdescribe().getChildRelationships();
system.debug('relatedObjectsList :'+relatedObjectsList);
List<SelectOption> Relationships = new List<SelectOption>();
for (Schema.Childrelationship relatedObject : relatedObjectsList) {
    if(relatedObject.getChildSObject().getDescribe().isUpdateable()
&&
relatedObject.getChildSObject().getDescribe().getKeyPrefix()!=null
&&
!relatedObject.getChildSObject().getDescribe().isCustomSetting()
&&
relatedObject.getChildSObject().getDescribe().isCreateable()
)
            if(relatedObject.getRelationshipName() != null){
                Relationships.add(new SelectOption(relatedObject.getRelationshipName(),relatedObject.getRelationshipName()));
            }
            system.debug('Relationships :'+Relationships);
        }
    return Relationships;
}

public List<SelectOption> getChildObjectFields(){
Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();
system.debug('selectedChildobject :'+selectedChildobject);
Schema.SObjectType ObjectSchema = schemaMap.get(selectedChildobject);
Map<String, Schema.SObjectField> ChildfieldMap = ObjectSchema.getDescribe().fields.getMap();
List<SelectOption> ChildfieldNames = new List<SelectOption>();
for (String ChildfieldName: ChildfieldMap.keySet())
{
ChildfieldNames.add(new SelectOption(ChildfieldMap.get(ChildfieldName).getDescribe().getLabel(),ChildfieldMap.get(ChildfieldName).getDescribe().getLabel()));
}
return ChildfieldNames;
   }
}

Vf page:

<apex:page controller="ConfigurationController" sidebar="false">
<apex:form >
<apex:pageBlock >
<apex:pageBlockSection columns="2" title="ParentSection">

<apex:pageBlockSectionItem >
<apex:outputlabel value="Object:"/>
<apex:actionRegion >
<apex:selectList value="{!selectedObject}" size="1">
<apex:selectOptions value="{!ObjectNames}"/>
<apex:actionSupport event="onchange" rerender="myFields,childobj,relationship,childfields1"/>
</apex:selectList>
</apex:actionRegion>
</apex:pageBlockSectionItem>

<apex:pageBlockSectionItem >
<apex:outputlabel value="Fields:"/>
<apex:outputPanel id="myFields">
<apex:actionRegion >
<apex:selectList value="{!selectedField}" size="1">
<apex:selectOptions value="{!ObjectFields}"/>
</apex:selectList>
</apex:actionRegion>
</apex:outputPanel>
</apex:pageBlockSectionItem>

</apex:pageBlockSection>

<apex:pageBlockSection columns="3" title="ChildSection">

<apex:pageBlockSectionItem >
<apex:outputlabel value="ChildObjects:"/>
<apex:outputPanel id="childobj">
<apex:actionRegion >
<apex:selectList value="{!selectedChildobject}" size="1">
<apex:selectOptions value="{!RelatedObjects}"/>
<apex:actionSupport event="onchange" rerender="childfields"/>
</apex:selectList>
</apex:actionRegion>
</apex:outputPanel>
</apex:pageBlockSectionItem>

          <apex:pageBlockSectionItem >
<apex:outputlabel value="Relationships:"/>
<apex:outputPanel id="relationship">
<apex:actionRegion >
<apex:selectList value="{!Relationship}" size="1">
<apex:selectOptions value="{!Relationships}"/>
</apex:selectList>
</apex:actionRegion>
</apex:outputPanel>
</apex:pageBlockSectionItem>

<apex:pageBlockSectionItem >
<apex:outputlabel value="Fields:"/>
<apex:outputPanel id="childfields">
<apex:actionRegion >
<apex:selectList value="{!selectedchildField}" size="1">
<apex:selectOptions value="{!ChildObjectFields}"/>
</apex:selectList>
</apex:actionRegion>
        </apex:outputPanel>
</apex:pageBlockSectionItem>

</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>

February 17, 2015
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Best Answer chosen by App Development

Bhanu Mahesh
Hi,
Try below code

I did a modification on page while rendering rerender="myFields,childobj,relationship,childfields1"
there Id of childfields section is childfields

And I did modification in getRelatedObjects and getChildObjectFields methods

Controller:
public with sharing class ConfigurationController { public Map <String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe(); public String selectedObject {get; set;} public String selectedField {get; set;} public String selectedChildobject {get; set;} public String selectedchildField {get; set;} public String Relationship {get; set;} public String prevSelectedObj = ''; Public ConfigurationController(){ selectedObject = 'Account'; selectedChildobject = 'Account'; } public List<SelectOption> getObjectNames(){ List<SelectOption> objNames = new List<SelectOption>(); List<String> entities = new List<String>(schemaMap.keySet()); entities.sort(); for(String name : entities) { objNames.add(new SelectOption(schemaMap.get(name).getDescribe().getName() ,schemaMap.get(name).getDescribe().getLabel() )); } return objNames; } public List<SelectOption> getObjectFields(){ Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe(); Schema.SObjectType ObjectSchema = schemaMap.get(selectedObject); Map<String, Schema.SObjectField> fieldMap = ObjectSchema.getDescribe().fields.getMap(); List<SelectOption> fieldNames = new List<SelectOption>(); for (String fieldName: fieldMap.keySet()) { fieldNames.add(new SelectOption(fieldMap.get(fieldName).getDescribe().getLabel(),fieldMap.get(fieldName).getDescribe().getLabel())); } return fieldNames; } public List<SelectOption> getRelatedObjects(){ map<string,string> relatedObjectsMap = new map<string,string>(); system.debug('selectedObject :'+selectedObject); list<Schema.Childrelationship> relatedObjectsList = Schema.getGlobalDescribe().get(selectedObject).getdescribe().getChildRelationships(); system.debug('relatedObjectsList :'+relatedObjectsList); List<SelectOption> ChildobjNames = new List<SelectOption>(); for (Schema.Childrelationship relatedObject : relatedObjectsList) { if(relatedObject.getChildSObject().getDescribe().isUpdateable() && relatedObject.getChildSObject().getDescribe().getKeyPrefix()!=null && !relatedObject.getChildSObject().getDescribe().isCustomSetting() && relatedObject.getChildSObject().getDescribe().isCreateable() ) ChildobjNames.add(new SelectOption(relatedObject.getChildSObject().getDescribe().getName(),relatedObject.getChildSObject().getDescribe().getLabel())); system.debug('ChildobjNames :'+ChildobjNames); } if(selectedObject != prevSelectedObj){ if(ChildobjNames != null && ChildobjNames.size() > 0){ selectedChildobject = ChildobjNames[0].getValue(); } else { selectedChildobject = ''; } } return ChildobjNames; } public List<SelectOption> getRelationships(){ map<string,string> relatedObjectsMap = new map<string,string>(); system.debug('selectedObject :'+selectedObject ); list<Schema.Childrelationship> relatedObjectsList = Schema.getGlobalDescribe().get(selectedObject).getdescribe().getChildRelationships(); system.debug('relatedObjectsList :'+relatedObjectsList); List<SelectOption> Relationships = new List<SelectOption>(); for (Schema.Childrelationship relatedObject : relatedObjectsList) { if(relatedObject.getChildSObject().getDescribe().isUpdateable() && relatedObject.getChildSObject().getDescribe().getKeyPrefix()!=null && !relatedObject.getChildSObject().getDescribe().isCustomSetting() && relatedObject.getChildSObject().getDescribe().isCreateable() ) if(relatedObject.getRelationshipName() != null){ Relationships.add(new SelectOption(relatedObject.getRelationshipName(),relatedObject.getRelationshipName())); } system.debug('Relationships :'+Relationships); } return Relationships; } public List<SelectOption> getChildObjectFields(){ Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe(); system.debug('selectedChildobject :'+selectedChildobject); List<SelectOption> ChildfieldNames = new List<SelectOption>(); if(!String.isBlank(selectedChildobject)){ Schema.SObjectType ObjectSchema = schemaMap.get(selectedChildobject); Map<String, Schema.SObjectField> ChildfieldMap = ObjectSchema.getDescribe().fields.getMap(); for (String ChildfieldName: ChildfieldMap.keySet()) { ChildfieldNames.add(new SelectOption(ChildfieldMap.get(ChildfieldName).getDescribe().getLabel(),ChildfieldMap.get(ChildfieldName).getDescribe().getLabel())); } prevSelectedObj = selectedChildobject; } return ChildfieldNames; } }

Page:
<apex:page controller="ConfigurationController" sidebar="false"> <apex:form > <apex:pageBlock > <apex:pageBlockSection columns="2" title="ParentSection"> <apex:pageBlockSectionItem > <apex:outputlabel value="Object:"/> <apex:actionRegion > <apex:selectList value="{!selectedObject}" size="1"> <apex:selectOptions value="{!ObjectNames}"/> <apex:actionSupport event="onchange" rerender="myFields,childobj,relationship,childfields"/> </apex:selectList> </apex:actionRegion> </apex:pageBlockSectionItem> <apex:pageBlockSectionItem > <apex:outputlabel value="Fields:"/> <apex:outputPanel id="myFields"> <apex:actionRegion > <apex:selectList value="{!selectedField}" size="1"> <apex:selectOptions value="{!ObjectFields}"/> </apex:selectList> </apex:actionRegion> </apex:outputPanel> </apex:pageBlockSectionItem> </apex:pageBlockSection> <apex:pageBlockSection columns="3" title="ChildSection"> <apex:pageBlockSectionItem > <apex:outputlabel value="ChildObjects:"/> <apex:outputPanel id="childobj"> <apex:actionRegion > <apex:selectList value="{!selectedChildobject}" size="1"> <apex:selectOptions value="{!RelatedObjects}"/> <apex:actionSupport event="onchange" rerender="childfields"/> </apex:selectList> </apex:actionRegion> </apex:outputPanel> </apex:pageBlockSectionItem> <apex:pageBlockSectionItem > <apex:outputlabel value="Relationships:"/> <apex:outputPanel id="relationship"> <apex:actionRegion > <apex:selectList value="{!Relationship}" size="1"> <apex:selectOptions value="{!Relationships}"/> </apex:selectList> </apex:actionRegion> </apex:outputPanel> </apex:pageBlockSectionItem> <apex:pageBlockSectionItem > <apex:outputlabel value="Fields:"/> <apex:outputPanel id="childfields"> <apex:actionRegion > <apex:selectList value="{!selectedchildField}" size="1"> <apex:selectOptions value="{!ChildObjectFields}"/> </apex:selectList> </apex:actionRegion> </apex:outputPanel> </apex:pageBlockSectionItem> </apex:pageBlockSection> </apex:pageBlock> </apex:form> </apex:page>

Regards,
Bhanu Mahesh