[SalesForce] How to display a list of all object types in Salesforce instance

I am trying to get a VisualForce page to display a SelectList of every object type in a Salesforce instance. Account, Contact, etc. I am using Schema.getGlobalDescribe()but am running into an issue where I am getting the error "System.SerializationException: Not Serializable: Schema.DescribeSObjectResult."

Here is my code. I am particularly puzzled because, without the commented out line, I am not actually using the Schema.DescribeSObjectResult object, only the SObjectType.

Controller:

public with sharing class searchController {

    //Properties
    public SelectOption[] objectSelect{
        get; set;
    }

    public String objName{get; set;}

    //Constructor
    public searchController()
    {
        Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();

        objectSelect = new SelectOption[]{};
        for(String name : schemaMap.keySet())
        {
            //objectSelect.add(new SelectOption(name, schemaMap.get(name).getDescribe().getLabel()));
            objectSelect.add(new SelectOption(name, name));
        }

        objName = objectSelect[0].getValue();
        filter = new FilterRule(objName);
    }


}

And my VisualForce page:

<apex:page controller="searchController">

<apex:form id="searchForm">
    <apex:pageBlock >
        <apex:pageBlockSection id="objSelectBlock" title="What are you Searching For?">
            <apex:selectList value="{!objName}">
                <apex:selectOptions value="{!objectSelect}"/>
            </apex:selectList>
        </apex:pageBlockSection> 
    </apex:pageBlock>
</apex:form>

Best Answer

You can't serialize describes. You will have to call describeGlobal at least once per transaction every time you need to use it.

Related Solutions

[SalesForce] Display all picklist values regardless of record types on Visualforce page

public with sharing class extension_user {
private String first_picklist_option = '- All -'; //first value to display in picklist
private final User user_object; //User sobject

public extension_user(ApexPages.StandardController stdController) {
    this.user_object = (User)stdController.getRecord();
}

//builds a picklist of values based upon the passed information
public List<selectOption> getPickValues(Sobject object_name, String field_name, String first_val) {
    List<selectOption> options = new List<selectOption>(); //new list for holding all of the picklist options
    if ( first_val != null ) { //if there is a first value being provided
        options.add(new selectOption(first_val, first_val)); //add the first option
    }
    Schema.sObjectType sobject_type = object_name.getSObjectType(); //grab the sobject that was passed
    Schema.DescribeSObjectResult sobject_describe = sobject_type.getDescribe(); //describe the sobject
    Map<String, Schema.SObjectField> field_map = sobject_describe.fields.getMap(); //get a map of fields for the passed sobject
    List<Schema.PicklistEntry> pick_list_values = field_map.get(field_name).getDescribe().getPickListValues(); //grab the list of picklist values for the passed field on the sobject
    for (Schema.PicklistEntry a : pick_list_values) { //for all values in the picklist list
        options.add(new selectOption(a.getLabel(), a.getValue()));  //add the value and label to our final list
    }
    return options; //return the List
}

//return the picklist options for User.TimeZoneSidKey
public List<selectOption> getTimeZones() {
    return getPickValues(user_object, 'TimeZoneSidKey', first_picklist_option);
}

//return the picklist options for User.LocaleSidKey
public List<selectOption> getLocales() {
    return getPickValues(user_object, 'LocaleSidKey', first_picklist_option);
}

}

<apex:page standardController="User" extensions="extension_user">
<apex:sectionHeader title="Visualforce Sample" subtitle="Describe for Picklist Values" help="/help/doc/user_ed.jsp?loc=help"></apex:sectionHeader>
<apex:form >
    <apex:pageBlock title="Criteria" mode="edit">
        <apex:pageBlockSection title="Information" columns="1">
            <apex:pageBlockSectionItem>
                <apex:outputLabel value="Time Zones" for="time_zones"></apex:outputLabel>
                <apex:selectList id="time_zones" size="1" title="Time Zones">
                    <apex:selectOptions value="{!TimeZones}"></apex:selectOptions>
                </apex:selectList>
            </apex:pageBlockSectionItem>
            <apex:pageBlockSectionItem>
                <apex:outputLabel value="Locales" for="locale"></apex:outputLabel>
                <apex:selectList id="locale" size="1" title="Locale">
                    <apex:selectOptions value="{!Locales}"></apex:selectOptions>
                </apex:selectList>
            </apex:pageBlockSectionItem>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:form>
 </apex:page>

[SalesForce] How to get Standard and Custom Object List in Apex class

Here is updated code that will give list of all objects excluding Share, history , Tag & feed. You can add extra condition to filter out other unnecessary sObjects.

List<string> SObjectList = new List<string>();

for(Schema.SObjectType objTyp : Schema.getGlobalDescribe().Values()){
   String name = objTyp.getDescribe().getName();
   // Exclude all the unwanted Sobjects e.g. History, Share etc..

 if((!name.containsignorecase('history') && !name.containsignorecase('tag')&&
    !name.containsignorecase('share') && !name.containsignorecase('feed')) || 
     name.toLowerCase().right(3) ==  '__c'){      
      SobjectList.add(name);
      System.debug( 'Name : ' + name);
  }

}

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