Question

使用相关记录中的值更新新商机列表的正确方法是什么。

for (Opportunity opps:Trigger.new){
[SELECT Id, CorpOwner__r, Contact__r,(SELECT Id, AccountLocation from Account)]
o.CorpOwner__r =Account.Id; o.AccountLocation = opps.Account.AccountLocation; 
insert opps

您是否通过__r后缀调用查找字段？您是否可以在插入操作之前执行操作并仍然查看Opportunity.CorpOwner__r与CorpOwner__r帐户记录中的值的关系，或者由于尚未创建记录，该关系是否不存在？什么是适当的批处理方式呢？

Answer 1

这里展示了许多概念的可能性：

trigger UpdateOpptyWithAccountInfo on Opportunity (before insert) {

    // Keep this SOQL query out of the FOR loop for better efficiency/batching
    Map<Id, Account> relatedAccounts = new Map<Id, Account>(
      [SELECT Id, AccountLocation__c
       FROM Account
       WHERE Id IN
         (SELECT AccountId
         FROM Opportunity
         WHERE Id = :Trigger.new)
     ]
   );

   for (Opportunity o : Trigger.new) {

     /* Find each opportunity's Account in the map we queried for earlier
      * Note: there's probably a more efficient way to use a Map of Opportunity IDs to Account objects...
      * This works fine and could be more readable.
      */
     for (Account a : relatedAccounts.values()) {

       if (a.Id == o.AccountId) {

         // Once you've found the account related to this opportunity, update the values
         o.CorpOwner__c = a.Id;
         o.AccountLocation__c = a.AccountLocation__c; 
       }
     }
   }

   // We're still inside an `insert` trigger, so no need to call `insert` again.
   // The new fields will be inserted along with everything else.

}

如果您正在建立对象之间的关系，请使用__c后缀：

o.CorpOwner__c = a.Id;  // Associate Account `a` as Opportunity `o`'s CorpOwner

如果您要查找相关对象上的字段，则可以使用__r：

System.debug(o.CorpOwner__r.Name);  // Print Opportunity `o`'s CorpOwner's name

Apex代码，用相关对象的值更新新机会

1 个答案: