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Question 81/84
Refer to the code snippet below:
As part of an Integration development effort, a developer is tasked to create an Apex method mat solely relies on the use of foreign identifiers In order to relate new contact records to existing Accounts in Salesforce. The account object contains a field marked as an external ID, the API Name of this field is Legacy_Id_c.
What Is the most efficient way to instantiate the parentAccount: variable on line 02 to ensure the newly created contact is properly related to the Account?
As part of an Integration development effort, a developer is tasked to create an Apex method mat solely relies on the use of foreign identifiers In order to relate new contact records to existing Accounts in Salesforce. The account object contains a field marked as an external ID, the API Name of this field is Legacy_Id_c.
What Is the most efficient way to instantiate the parentAccount: variable on line 02 to ensure the newly created contact is properly related to the Account?
Recent Comments (The most recent comments are at the top.)
The most efficient way to instantiate the parentAccount variable on line 02 to ensure the newly created contact is properly related to the Account is:
A. Account parentAccount = new Account(Legacy_Id_c = externalIdentifier);
This option allows the developer to use the external ID field as a foreign key, which means that they can create a record and relate it to another existing record in a single step instead of querying the parent record ID first. To do this, the developer needs to set the foreign key field to an instance of the parent sObject that only has the external ID field specified⁶.
The other options are not efficient for the following reasons:
- Option B is incorrect because it creates a new instance of the parent sObject and assigns the external identifier to its ID field, which will not work as expected. The ID field is a system-generated field that cannot be manually assigned or modified. The developer should use the external ID field instead.
- Option C is incorrect because it queries the parent record ID using SOQL, which consumes more resources and time than using the external ID field. It also has a syntax error, as it tries to assign a list of records to a single record variable.
- Option D is incorrect because it queries the parent record ID using SOQL, which consumes more resources and time than using the external ID field. It also assigns the entire parent record to the foreign key field, which is unnecessary and may cause errors.
https://salesforce.stackexchange.com/questions/151478/what-are-best-practices-for-upserting-objects-with-foreign-key-members-i-e-ref.
https://help.salesforce.com/s/articleView?id=000385174&language=en_US&type=1.
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_dml_nested_object.htm.
https://help.salesforce.com/s/articleView?id=000383278&language=en_US&type=1.
https://help.salesforce.com/s/articleView?id=000383207&language=en_US&type=1....