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 Two objects Parent__c and Child__c are there. Child__c has look up to Parent__c. click here to see the full question ?

Child__c has two fields Amount and quantitiy. In parent display total amount and total quantity of all the related child records.

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Solution

Prerequisite

Please follow the below steps to proceed with this example.

S.No	Component
	Follow the order as mentioned below to create the components
	Configuration
1	Create New App App Label: Sample App Name Sample Note: Enable security for all the profiles.
2	Create New Custom Object Singular Label: Parent Plural Label: Parents Object Name: Parent Standard Field: Field Label Parent No: Data Type: Auto Number Display Format: P-{00000}
3	Create New Custom Object Singular Label: Child Plural Label: Childs Object Name: Child Standard Field: Field Label Child No: Data Type: Auto Number Display Format: C-{00000}

1. Scenario: Child__c and Parent__c are the two custom objects and the relationship between them is Look-up relationship. click here to see the full question.

Child__c has a look-up relationship with the object Parent__c. In case of look-up relationship, if we delete the parent objects records then in child object only that look-up value will be removed. Here the requirement is whenever user delete the parent records then all the related child records should be deleted (entire record).

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Solution

pop-uptext

/* Description:
   * ============
   * Apex Trigger to delete the related child object records upon
   * deleting the parent object record in case of look up
   * relationship *
   * Author:
   * ========
   * www.srinusfdc.com  
   */
trigger ParentTrigger on Parent__c (before delete) {
    /*Assume that parent__c is a field api name( look up to parent object) in child object.*/
    delete [select id from Child__c where parent__c in: trigger.old];
    /*Note: trigger.old will be automatically converted to set of ids 
    by salesforce (alternative: trigger.oldMap.keyset()).*/
}