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sonali vermasonali verma 

No relationship

Hi
I have 2 custom objects say Book1 and Book2 and I insert exactly same records in both the objects.
There is no relaitonship between Book1 and Book2.
Both objects have same fields Name and price respectively.
My requirement is when I update a record in Book1, then it should update the matching record in Book2.

I am stuck at the update level, pls help me out
here is the code 
public class Book1Scenarios
{
  
  Book2__c book2=new Book2__c();      

//Insert is working
  public void Create(List<Book1__c> book1)
  {
    for(Book1__c b1: book1)
    {
      book2.Name=b1.Name;
      book2.price__c=b1.price__c;
      
    }
    
    insert book2;
   } 
   

// update operation.
   public void UpdateRecord(List<Book1__c> oldbook1)
   {
    List<Book2__c> oldbook2=[select Name,price__c from Book2__c];
    
    for(Book1__c b1:oldbook1)
    {
      for(Book2__c b2:oldbook2)
      {
         if((b1.Name == b2.Name) && (b1.price__c == b2.price__c))
         {
            b2.Name=b1.Name;
            b2.price__c=b1.price__c;
         }
      }
    }
    Database.update(oldbook2);
   }
   
}


trigger trg_Book1Scenarios on Book1__c (after Insert)
{
   Book1Scenarios b1=new Book1Scenarios();
   
   if (trigger.isInsert)
   {
    b1.create(Trigger.New);
   }
   
  if (trigger.isUpdate)
  {
    b1.UpdateRecord(Trigger.Old);
  }

   
}

sonali verma
divya

 
srivanisrivani
Hi,
You are not updating with new values.
from trigger pass trigger.oldMap and trigger.new like
b1.UpdateRecord(Trigger.OldMap,trigger.new);

Change code inside class as follows:
public void UpdateRecord(Map<Id,Book1__c> oldmap,List<Book1__c> newbooklist1)
   {
    List<Book2__c> book2list=[select Name,price__c from Book2__c]; 
    
    for(Book1__c b1:newbooklist1)
    {
      for(Book2__c b2:book2list)
      {
         if((oldmap.get(b1.Id).Name == b2.Name) && (oldmap.get(b1.Id).price__c == b2.price__c))
         {
            b2.Name=b1.Name;
            b2.price__c=b1.price__c;
         }
      }
    }
    Database.update(book2list);
   }
bhuvana dasbhuvana das
Hi sonali verma,
Please check the below code, hope this will work.

Helper class:
============
public class BookHelper {
    public Static map<String,Book2__c> bookMap = new Map<String,Book2__c>();
    public static void CreateBooks(List<Book1__c> books){
        List<Book2__c> books2 = new List<Book2__c>();
        for(Book1__c bk1 : books){
            Book2__c b2 = new Book2__c();
            b2.Name = bk1.name;
            b2.Price__c = bk1.Price__c;
            bookMap.put(bk1.Name,b2);
            books2.add(b2);
        }
        insert books2;
    }
    public static void UpdateBooks2(List<Book1__c> bks1){
       for(Book1__c b1 : bks1){
            if(bookMap.get(b1.name).name==b1.name){
                bookMap.get(b1.Name).Price__c=b1.Price__c;
            }
        }
        update bookMap.values();
    }
}

=======
Trigger:
=======

trigger booksTrigger on Book1__c (after insert, after update) {
    if(Trigger.isAfter){
        if(Trigger.isInsert)
            BookHelper.CreateBooks(Trigger.new);
        if(Trigger.isUpdate)
            BooKHelper.UpdateBooks2(Trigger.old);
    }
}

=======
Test class
=======

@isTest
public class TestBooksTrigger {
    @isTest static void createbooks1(){
        List<Book1__c> newBooks = new List<Book1__C>();
        for(Integer i=0; i<200; i++){
            Book1__c b1 = new Book1__c(Name = 'TestBook1_' +i, Price__c = i);
            newBooks.add(b1);
        }
        insert newBooks;
        List<Book1__C> updateBoks = new List<Book1__C>();
        List<Book1__c> newBooksList = [Select name FROM Book1__C WHERE ID IN:newBooks];
        for(Book1__c b1 : newBooksList){
            b1.Price__c = 120;
                updateBoks.add(b1);
            }
        update updateBoks;
        }
}
sonali vermasonali verma
Hi bhuvana
The problem I am facing is after we edit record in book1,  bookMap will not contain any values.
so the condition    " if(bookMap.get(b1.name).name==b1.name)  "   fails, hence it doesn't update.


thanks
sonali
 
bhuvana dasbhuvana das
Hi Sonali,

Assuming that there is unique name, by using apex we can like this as shown below:

Trigger:
-------------

trigger booksTrigger on Book1__c (after insert, after update) {
   BookHelper bhelp = new BookHelper();
    public List<Book2__C> books2 = new List<Book2__C>();
    public Map<String,Book2__C> newbook2Map = new Map<String,Book2__C>();
    if(Trigger.isAfter){
        if(Trigger.isInsert)
            bhelp.CreateBooks(Trigger.new);
        if(Trigger.isUpdate)
            bhelp.UpdateBooks2(Trigger.new);
    }
}

Helper class
----------------

public class BookHelper {
 
   public map<String,Book2__c> bookMap;
   public map<String,Book2__c> newbookMap;
   public List<Book2__c> book2List;
    
    public BookHelper(){
        bookMap = new Map<String,Book2__c>();
    }
    public void CreateBooks(List<Book1__c> books){
        List<Book2__c> books2 = new List<Book2__c>();
        for(Book1__c bk1 : books){
            Book2__c b2 = new Book2__c();
            b2.Name = bk1.name;
            b2.Price__c = bk1.Price__c;
            books2.add(b2);
        }
        insert books2;
    }
    
// update operation.
   public void UpdateBooks2(List<Book1__c> oldbook1)
   {
       newbookMap = new map<String,Book2__c>(); 
       book2List = [Select id,name FROM Book2__c];
       for(Book2__c b2 : book2List){
           newbookMap.put(b2.name,b2);
       }
    for(Book1__c b1:oldbook1)
    {
        if(newbookMap.get(b1.name).name.equals(b1.name)){
            newbookMap.get(b1.name).Price__c = b1.Price__c;
        } 
    }
    Database.update(newbookMap.values());
   }
}


However we can do this by using process builder.