Rest Integration With Postman

Step: 1

• For Rest Integration with using POSTMAN tool first you need to create the Connected app in your org.like shown in the below Image.

  

Step :2

• After saving the connected app you will be getting a Consumer key And Consumer Secret.

Step:3

• Now you need to install/ add postman chrome extension and register with your Google account.
• Then you need to copy Callback URL From connected app then paste the URL in postman url section as shown in below pic.
•  we need to write body section under Grant type
• syntax: grant_type=password&client_id=your_clientid_here&client_secret=your_client_secret_here&username=your_username&password=your_password_hereWithsecuritytoken 
• Client_id = Consumer Key, client_secret = Consumer secret,password = your password with securitytoken 
• Ex:  grant_type=password&client_id=3MVG9YDQS5WtC11rG9SGkhKCagCn2tK1zutzAjxjg0FiN9jt97YDsyW27HbUS2gjxWClYumtI7DrKYmZ5MFVy &client_secret=4464276243039650923&username=malleshmyakala@developer.com&password=Mallesh@25s2TZJjF8P9zLx1RAwTtNYNABD
• URL type should be POST, Then click on send.

• After hitting the send button you will be seeing the authentication code.
• when status code =  "200 ok" it means executed successfully 
• here we will get Access Token                                                                                 authentication code:                                                                                                                   {                                                                                                                                           "access_token":"00D6F000001O0Y4!ARAAQLbZ0_vR.ijv3sdsKAu6d5xF7Aj2Mmt2_nXQDNf1aPgfICSrIynLsqdlebVRY0de0bZTxspSFmhXYv0o6ftnzAIn8Mpd",                "instance_url": "https://manuyadav-dev-ed.my.salesforce.com",                                              "id": "https://login.salesforce.com/id/00D6F000001O0Y4UAK/0056F000006j2ohQAA", "token_type": "Bearer",                                                                                                 "issued_at": "1542617533665",                                                                                   "signature": "k8yPqZ9WRAzBGAiVLdsBrnmz8ZRN44wi26m5tlZl0BA="                              }
• Now we need to setup Content Type = "application/json" and Authentication= "Bearer access_token" in Headers Tab.                                                                                         Ex:Bearer 00D6F000001O0Y4!ARAAQLbZ0_vR.ijv3sdsKAu6d5xF7Aj2Mmt2_nXQDNf1aPgfICSrIynLsqdlebVRY0de0bZTxspSFmhXYv0o6ftnzAIn8Mpd

Step:4

 write the code for Rest API like below.

@RestResource(urlMapping='/AccountService/*')

Global class RestServiceTest {

    

    

    @httpPost

    global static string dopost(string accName, string Phone){

        Account acc = new Account();

      acc.Name = accName;

        acc.Phone=Phone;

        insert acc;

        

        return'Post method called successfully'+Acc.Id; 

    }

    

       @httpGet

    global static List<account> doGet(){

        

        RestRequest request = RestContext.request;

        

        string AccId=request.requestURI.substring(request.requestURI.lastindexOf('/')+1);

        system.debug('====accId===='+accId);

        list<account> lstAccs= [select id,name,phone from account where id=:accId];

        return lstAccs;

        

        }

    }

After writing the Code for Rest API then we need to create URL.

EX: https://manuyadav-dev-ed.my.salesforce.com/services/apexrest/AccountService

• https://manuyadav-dev-ed.my.salesforce.com/(This is your org URL)
• services/apexrest/(this is common service for postman)
• AccountService(this is urlMapping name in your Rest class @RestResource)      

enter  (Postman URL)  in post section in postman tool. write the JSON code in the body section. then hit send button.

.

If Status is "200 ok" then you will find  created account Id. as shown in the below pic

this is the process for creating the record using REST API service through POSTMAN tool.

• Now coming to GET process 
• Under the get type enter the URL
• EX: https://manuyadav-dev-ed.my.salesforce.com/services/apexrest/0016F00002zmISH                     https://manuyadav-dev-ed.my.salesforce.com (Your Org URL )                                                       /services/apexrest/   (Common service)                                                                                            0016F00002zmISH (This is account ID)
• Then just hit send button now you will be getting the particular account details as shown in below pic.

This is the process for getting the record details using REST API Service through Postman.

How to stop recursive trigger in salesforce

What is a Recursive Trigger :

A recursive trigger is one that performs an action, such as an update or insert, which invokes itself owing to,  say something like an update it performs.

How to avoid Recursive Trigger:

To avoid recursive triggers you can create a class with a static Boolean variable with default value true. In the trigger, before executing your code keep a check that the variable is true or not. Once you check make the variable false.

Example:

Apex Code:

public Class checkRecursive{
    private static boolean run = true;
    public static boolean runOnce(){
    if(run){
     run=false;
     return true;
    }else{
        return run;
 }
    }
}

 Trigger Code:

trigger updateTrigger on anyObject(after update) {
    if(checkRecursive.runOnce())
    {
    //write your code here            
    }
}

Example2:


Scenario: There is an after update trigger on account object. In the trigger, there is a date field we are checking the date is changed or not if it is changed we are doing some process.The trigger is executed five times in the transaction.
​



Apex Code:




public class ContactTriggerHandler
{
     public static Boolean isFirstTime = true;
}



Trigger Code:




trigger ContactTriggers on Contact (after update)

{
    Set<String> accIdSet = new Set<String>(); 
    if(ContactTriggerHandler.isFirstTime)
    {
        ContactTriggerHandler.isFirstTime = false;
         for(Contact conObj : Trigger.New)
  {
            if(conObj.name != 'Test') 
     {
                accIdSet.add(conObj.accountId);
            }
         }
   // any code here
    }
}

=====================================================================================


Apex Class Code:

public class checkRecursive {

     public static Set<Id> SetOfIDs = new Set<Id>();

}



Trigger Code:






trigger TestTrigger on Account (before insert) {

    if (Trigger.isAfter && Trigger.isInsert) {

        List<Account> accList = new List<Account>();

      for (Account test: Trigger.new) {

          If(!checkRecursive.SetOfIDs.contains(test.Id)){

              test.Name = 'helloworld'; 

              accList.add(test);

            checkRecursive.SetOfIDs.add(test.Id);

          }

      }

      insert  accList;

    }

}