Visualforce Developer Guide

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Introducing Visualforce
Tools for Visualforce Development
Getting a Quick Start with Visualforce
Customizing the Appearance and Output of Visualforce Pages
Standard Controllers
Standard List Controllers
Custom Controllers and Controller Extensions
Advanced Examples
Override Buttons, Links, and Tabs with Visualforce
Using Static Resources
Creating and Using Custom Components
Dynamic Visualforce Bindings
Dynamic Visualforce Components
Integrate Email with Visualforce
Visualforce Charting
Creating Maps with Visualforce
Render Flows with Visualforce
Templating with Visualforce
Developing Salesforce Apps with Visualforce
Adding Visualforce to a Salesforce AppExchange App
Using JavaScript in Visualforce Pages
Communicating Across the DOM with Lightning Message Service
Visualforce Best Practices
Standard Visualforce Component Reference
Appendices
Global Variables, Functions, and Expression Operators
Global Variables
$Action
$Api
$Asset
$Cache.Org
$Cache.Session
$Component
$ComponentLabel
$CurrentPage
$FieldSet
$Label
$Label.Site
$MessageChannel
$Network
$ObjectType
Object Schema Details Available Using $ObjectType
Field Schema Details Available Using $ObjectType
$Organization
$Page
$Permission
$Profile
$Resource
$SControl
$Setup
$Site
$System.OriginDateTime
$User
$User.UITheme and $User.UIThemeDisplayed
$UserRole
Functions
Expression Operators
Security Tips for Apex and Visualforce Development
Apex Classes Used in Visualforce Controllers
Execution Governors and Limits
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Object Schema Details Available Using $ObjectType

Use the $ObjectType global variable to access schema information about the objects in your organization. For example, to access the name, label, and accessibility of an object.

The information available using $ObjectType is a subset of the information available using the Apex describe result, the DescribeSObjectResult system object. This table describes the attributes available from the $ObjectType global variable.

Name Data Type Description
fields Special This attribute can’t be used by itself. Instead, fields should be followed by a field member variable name, and then a field attribute. For example,
{!$ObjectType.Account.fields.Name.Label}
fieldSets Special This attribute can’t be used by itself. Instead, fieldSets should be followed by a field set name, and used in an iteration component. For example, 
<apex:repeat 
    value="{!$ObjectType.Contact.FieldSets.properNames}" 
    var="f">
keyPrefix String The three-character prefix code for the object. Record IDs are prefixed with three-character codes that specify the object type. For example, accounts have a prefix of 001 and opportunities have a prefix of 006).

$ObjectType returns a value for objects that have a stable prefix. For object types that don’t have a stable or predictable prefix, this field is blank. Pages that rely on these codes can use this way of determining object types to ensure forward compatibility.
label String The object’s label, which often matches the object name. For example, an organization in the medical industry might change the label for Account to Patient. This label matches the one used in the Salesforce user interface.
labelPlural String The object’s plural label, which often matches the object name. For example, an organization in the medical industry might change the plural label for Account to Patients. This label matches the one used in the Salesforce user interface.
name String The name of the object.
accessible Boolean true if the current user can see this object, false otherwise.
createable Boolean true if the object can be created by the current user, false otherwise.
custom Boolean true if the object is a custom object, false if it’s a standard object.
deletable Boolean true if the object can be deleted by the current user, false otherwise.
mergeable Boolean true if the object can be merged with other objects of its type by the current user, false otherwise.
queryable Boolean true if the object can be queried by the current user, false otherwise
searchable Boolean true if the object can be searched by the current user, false otherwise.
undeletable Boolean true if the object can’t be undeleted by the current user, false otherwise.
updateable Boolean true if the object can be updated by the current user, false otherwise.