Apex Developer Guide: Triggers and Execution Order

Questions and Answers

What happens before Salesforce executes server-side events when saving a record?

The new record field values are overwritten.

The original record is loaded from the database.

JavaScript validation runs in the browser. (correct)

Server-side validation checks are performed.

What is the initial action taken by Salesforce when executing requests related to an upsert statement?

Checks compliance with layout-specific rules.

Runs custom validation checks.

Loads the original record from the database. (correct)

Loads the new record field values.

What type of validation checks are performed on a request from a standard UI edit page?

System validation checks including layout-specific rules and required values. (correct)

Both layout-level requirements and custom validation rules.

Only compliance with layout-specific rules.

Only maximum field length and valid field formats.

Which of the following is NOT a type of validation check run by Salesforce for standard UI edit page requests?

Custom validation rules. Signup and view all the answers

What specific validation is performed only for requests from multiline item creation?

Custom validation rules. Signup and view all the answers

For which type of requests does Salesforce validate only foreign keys and restricted picklists?

Requests from Apex applications. Signup and view all the answers

What aspect of the record is affected by layout-specific rules during validation?

The required values based on field definitions. Signup and view all the answers

What does Salesforce ensure during the loading of new record field values?

They overwrite the old values from previous requests. Signup and view all the answers

What should a developer do to check the most current order of execution for an API version?

Refer to the Apex Developer Guide for that API version. Signup and view all the answers

Which system validation step does not rerun when a request comes from a standard UI edit page?

Layout-specific rules Signup and view all the answers

What occurs if a duplicate rule identifies a record as a duplicate and uses the block action?

The record is not saved, and no further actions are taken. Signup and view all the answers

During the execution sequence, after saving a record, which element is executed last?

Post-commit logic Signup and view all the answers

When a workflow rule triggers a field update, what will Trigger.old hold during the subsequent update trigger?

The initial value before any updates Signup and view all the answers

What happens if a DML call is made with partial success allowed during triggers?

Triggers are fired multiple times, maintaining state. Signup and view all the answers

Which automation does not execute in a guaranteed order during the save procedure?

Process Builder processes Signup and view all the answers

What occurs to a parent record if it contains a roll-up summary field during an update?

It undergoes evaluation and potential updates. Signup and view all the answers

If more than one trigger is defined on an object for the same event, what is guaranteed?

No guaranteed order of trigger execution. Signup and view all the answers

After executing workflow rules that result in field updates, which component is triggered next?

After update triggers Signup and view all the answers

Which statement about the execution of record-triggered flows is true?

They can run after the record has been saved. Signup and view all the answers

Study Notes

Triggers and Order of Execution in Salesforce

Salesforce executes a specific sequence of events when saving a record with insert, update, or upsert statements.
JavaScript validation occurs in the browser for dependent picklist fields before server-side execution.

Sequence of Events

Loads the original record from the database or initializes for upsert.
Loads new values from the request, overwriting the old record.
For standard UI edits, system validation checks include:
- Compliance with layout-specific rules.
- Required values at both layout and field-definition levels.
- Valid field formats and maximum length checks.

Validation Based on Source

Custom validation rules are triggered for requests from User objects or multiline item creation.
For other sources (Apex applications or SOAP API), only foreign keys and restricted picklists are validated.
Salesforce ensures that custom foreign keys do not reference the object itself prior to trigger execution.

Trigger Execution

Before executing triggers:
- Executes record-triggered flows configured to run before saving the record.
- Executes all before triggers.
Most system validations are repeated, except layout-specific rules after standard UI edits.
Duplicate rules are executed, blocking saves if the record is identified as a duplicate with the block action.

Saving and Post-Saving Events

The record is saved to the database, but the transaction isn’t committed yet.
After triggers and assignment, auto-response, and workflow rules are executed.
If workflow field updates occur, the record is updated again and validations are repeated.

Flow Automations

Salesforce Flow automations trigger in a non-guaranteed order post record saving.
Executing DML operations within processes or flows involves another save procedure for affected records.

Roll-Up Summary Fields

If the record includes a roll-up summary field, calculations and updates are performed on the parent record and potentially on the grandparent record if applicable.

Commit and Post-Commit Logic

All DML operations are committed to the database at the end of the process.
Post-commit actions may include sending emails, queued Apex jobs, and asynchronous flow paths.

Recursive Saves

During recursive saves, specific steps (assignment through roll-up summary calculations) are skipped.

Additional Considerations

Trigger.old holds the record state before the initial update, not the updated post-workflow value.
For DML calls allowing partial success, triggers are fired once during initial attempts and again in subsequent ones without resetting static class variables.
The order of execution for multiple triggers on the same event is not guaranteed.

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Description

Explore the intricate world of Apex triggers and the order of execution in Salesforce. This quiz delves into how Salesforce processes records during insert, update, or upsert statements, and the role of JavaScript validation for dependent picklist fields. Test your understanding and application of these crucial concepts in Apex development.