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Zorluk: OrtaObject Relationships (Lookup, Master-Detail, Many-to-Many)

An administrator at a logistics company manages a custom data model where individual Package__c records are linked to a parent Delivery_Manifest__c object via a standard Lookup relationship. Management requests a field on Delivery_Manifest__c that automatically calculates the cumulative weight of all associated packages. When attempting to create a field on Delivery_Manifest__c, the Roll-Up Summary field type is disabled. Which configuration change must the administrator make to fulfill this requirement?

  1. Convert the existing Lookup field on Package__c into a Master-Detail relationship after ensuring all existing Package__c records have the Delivery_Manifest__c lookup field populated.Cevap
  2. B
    Create the Roll-Up Summary field on the child Package__c object and configure it to aggregate values onto the parent Delivery_Manifest__c record.
  3. C
    Change the Organization-Wide Default (OWD) sharing setting of Package__c to Controlled by Parent to enable Roll-Up Summary fields on the Lookup relationship.
  4. D
    Delete the existing Package__c records, create a Master-Detail relationship on Delivery_Manifest__c pointing to Package__c, and re-import the package data.

Cevap

Convert the existing Lookup field on Package__c into a Master-Detail relationship after ensuring all existing Package__c records have the Delivery_Manifest__c lookup field populated.
Declarative Roll-Up Summary fields require a Master-Detail relationship where the summarizing object acts as the master. Converting the Lookup relationship on the child object to a Master-Detail relationship enables Roll-Up Summary fields on the parent object, provided all existing child records contain populated parent lookup values prior to conversion.

Adım Adım Çözüm

1
Identify relationship requirements for declarative Roll-Up Summary fields in Salesforce.
Declarative Roll-Up Summary fields are only available on the parent object of a Master-Detail relationship, not on a standard Lookup relationship.
Salesforce platform rules strictly restrict declarative Roll-Up Summary field types to Master-Detail parent objects.
2
Evaluate the prerequisite for converting a Lookup relationship to a Master-Detail relationship.
All child records (Package__c) must have a value in the parent lookup field (Delivery_Manifest__c) before conversion.
Master-Detail relationships enforce mandatory parentage; null values are prohibited on detail records.
3
Convert the relationship field type and create the requested Roll-Up Summary field.
The field type on Package__c is converted to Master-Detail, allowing the administrator to create a SUM Roll-Up Summary field on Delivery_Manifest__c.
Once the Master-Detail relationship is established, the Roll-Up Summary field type becomes enabled on the parent object.

Anahtar Kavram

Roll-Up Summary Field Capabilities and Relationship Conversion Prerequisites
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Konular

Object Relationships (Lookup, Master-Detail, Many-to-Many)

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