The Limits methods return the specific limit for the particular governor, such as the number of calls of a method or the amount of heap size remaining.
Because Apex runs in a multitenant environment, the Apex runtime engine strictly enforces a number of limits to ensure that runaway Apex doesn’t monopolize shared resources.
None of the Limits methods require an argument. The format of the limits methods is as follows:
There are two versions of every method: the first returns the amount of the resource that has been used while the second version contains the word limit and returns the total amount of the resource that is available.
Limits Methods:
The following are methods for Limits. All methods are static.
In this article I’ll demonstrate how to insert record in Salesforce object by using javascript, in VF page without any standard or custom controller or by apex class.
By using AJAX Toolkit we can do this task easily. There are two types of AJAX Toolkit one is synchronous and another one is asynchronous call.
Here is a simple example of data insert using Javascript in Visualforce page. In below example I’m using synchronous call.
These are the steps to insert data using Javascript:
Connecting to the AJAX Toolkit(By using login methods or getting Session_ID).
Embedding the API methods in JavaScript.
Processing the results.
Sample Code:
<apex:page id="pg">
<script src="/soap/ajax/20.0/connection.js" type="text/javascript"></script>
<script>
function insertAcc(){
// Getting Session ID.
sforce.connection.sessionId = "{!$Api.Session_ID}";
//Creating New Account Record.
var account = new sforce.SObject("Account");
//Getting Account Name from inputText.
account.Name = document.getElementById("pg:frm:pb:pbs:pbsi:txtName").value;
//Create method
var result = sforce.connection.create([account]);
//Getting result
if (result[0].getBoolean("success")) {
alert("New Account is created with id " + result[0].id);
}
else {
alert("failed to create new Account " + result[0]);
}
}
</script>
<apex:form id="frm">
<apex:pageBlock title="Insert Account" tabStyle="Account" id="pb">
<apex:pageBlockSection title="Account Name" columns="1" id="pbs">
<apex:pageBlockSectionItem id="pbsi">
<apex:outputLabel value="Name" />
<apex:inputText title="Name" id="txtName" />
</apex:pageBlockSectionItem>
</apex:pageBlockSection>
<apex:pageBlockButtons>
<apex:commandButton onclick="return insertAcc();" value="Save"/>
</apex:pageBlockButtons>
</apex:pageBlock>
</apex:form>
</apex:page>
Global Picklist or Picklist Value Set is an Universal Picklist Values, which can be applied to any custom picklist fields that you create both on standard and custom objects.
Lets take an example, I have an object called “Student” and “Student Application” in these two object I have to create a picklist field called “Language”. So, here I’ve created a “Picklist Value Set” and used it on both object “Student Application”.
Click Setup || App Setup || Create || Picklist Value Set || Click ‘New’
Create “Language” Picklist Value Set:
Create “Language” Picklist from Picklist Value Set in “Student” and “Student Application” object:
Check “Language” Picklist Value Set, where it is used:
Note: You can have up to 500 picklist global value sets in an org. Each global value set, or restricted picklist, can contain a mix of 1,000 active and inactive values. Unrestricted picklists can have up to 1,000 active values. There’s no limit on the number of custom picklists that use global picklist value sets.
Picklist Value Set Considerations:
Validation rules are still defined at the field level, and are not part of the Picklist Value Set definition. This means, you can have the Business Unit picklist field on Account to respect a validation rule; and the same field on the Contact object not.
It is possible to create a mutli-select picklist field using a Picklist Value Set definition. However, in such cases the “replace” functionality available on regular picklist fields are not available.
Also, a picklist field created based on a Picklist Value Set cannot be used as a dependent picklist. It can still be used as a controlling picklist field. This is a known and documented limitation.
//Create a new account called "Test Account" that we will create a link for later.
Account acc = new Account(Name = 'Test Account');
Insert acc;
//Get the base URL.
String baseURL = URL.getSalesforceBaseUrl().toExternalForm();
System.debug('Base URL: ' + baseURL);
//Get the URL for the current request.
String currentReqURL = URL.getCurrentRequestUrl().toExternalForm();
System.debug('Current request URL: ' + currentReqURL);
//Create the account URL from the base URL.
String accURL = URL.getSalesforceBaseUrl().toExternalForm() + '/' + acc.Id;
System.debug('URL of a particular account: ' + accURL);
//Get some parts of the base URL.
System.debug('Host: ' + URL.getSalesforceBaseUrl().getHost());
System.debug('Protocol: ' + URL.getSalesforceBaseUrl().getProtocol());
//Get the query string of the current request.
System.debug('Query: ' + URL.getCurrentRequestUrl().getQuery());
public class Child{
public String Name;
public Child(String name) {
this.Name = name;
}
}
Parent Class:
public class Parent{
public Child[] ChildRecords;
public String Name;
public Parent(String Name) {
this.Name = name;
ChildRecords = new Child[0];
}
}
Pass parameters to above class using below code:
//Select Account Id from Account Object
String accountId = '0012800001A4UgG';
//Select Account & Contact Records
Account acc = [SELECT Id, Name, (SELECT Id, Name FROM Contacts) FROM Account WHERE Id =: accountId];
//Create a parent record
Parent par = new Parent(acc.Name);
//Loop on Contacts
for(Contact con: acc.Contacts) {
par.childRecords.add(new Child(con.Name));
}
//Get the Json data
String jsonData = JSON.serialize(par);
System.debug('JsonData-' + jsonData);
Here is the debug log snapshot of Json data:
Note: This is the sample class. You can modify it as per your requirement.
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