Write Apex Code

Write Apex Code

Use the Apex extension for VS Code to access code-editing features such as code completion, go to definition, view outlines of Apex classes and triggers, refactoring, and find syntactic errors in your code.

Code-Completion

The Apex extension provides context-sensitive suggestions when you’re working in an Apex class or trigger. As you type, auto-completion will list members such as, methods or variables. The auto-completion list also displays the documentation for the suggestions. Use these keys:

  • Ctrl+space to view code-completion suggestions
  • Arrow keys to navigate between the suggestions
  • Enter key to select from the suggestions

Animation showing code completion of PropertyController

If you want to change how suggestions are pre-selected, see IntelliSense - Suggestion selection.

Code Snippets

Code snippets are available for scaffolding class and interface definitions, a variety of statements such as loops and conditional statements etc. When you’re working in an Apex class or trigger, run Insert Snippet from the Command Palette to view the available snippets. You can also view these code snippets as code-completion suggestions.

If you want to define your own code snippets, read Snippets in Visual Studio Code.

Code Smartness for SObjects

To ensure that the code smartness feature correctly prompts completion suggestions, you must refresh the SObject definitions. Run the SFDX: Refresh SObject Definitions command from the Command Palette.

You can preview, view, or go to definitions of:

  • User-defined Apex
    • Classes (from definitions of extending classes)
    • Constructors
    • Interfaces (from definitions of implementing classes)
    • Methods
    • Properties
    • Variables (local and class variables)
  • Standard objects
    • Fields (standard and custom fields)
    • Object definitions
  • Custom objects
    • Fields
    • Object definitions

When you refresh SObject definitions, the extension uses the default org to generate Apex classes. These classes represent the standard and custom objects that the current user has access to. We recommend that you don’t edit these representative Apex classes because these classes are intended to be read-only. If they’re modified, it may impact the auto-completion suggestions. Also, the changes are lost when you refresh the SObject definitions.

Whenever you refresh SObject definitions, the representative Apex classes are deleted and regenerated. You can modify the SObjects either by updating the objects’ .object-meta.xml and .field-meta.xml files; Or by making changes declaratively in the default org. After modifying the SObjects, make sure to sync your local project and the default org.

When you launch the Salesforce CLI Integration extension (which is part of the Salesforce Extension Pack) for the first time and the salesforcedx-vscode-apex.enable-sobject-refresh-on-startup setting is enabled, SFDX: Refresh SObject Definitions command is executed automatically if your project doesn’t contain any Apex classes. After you add or edit standard or custom objects or their fields, make sure to run this command.

Go To Definitions

Apex extension provides go to definition support for user-defined Apex such as classes and methods, standard objects, and custom objects.

  • To preview a definition, press and hold Ctrl (Windows or Linux) or Cmd (macOS) and hover over the item whose definition you want to see.
  • To view a definition, right-click the item and select Peek Definition, or press Alt+F12.
  • To jump to the location of a definition, right-click the item and select Go to Definition, or press F12.

Previewing, viewing, and jumping to a definition

Find All References

You can find all references to user-defined Apex such as Classes, Class variables, Enums, Interfaces, Methods, and Properties. To find references, select an item and press Shift+F12; Or right-click the item and select Find All References. The reference results are displayed in the left pane of the editor window.

Outline View

The Apex outline view shows the structure of the Apex class or trigger that’s open in the editor.

  • To view the list of the symbols in the file, press Ctrl+Shift+O (Windows or Linux) or Cmd+Shift+O (macOS).
  • To go to one of the symbols, select it from the list.

Outline view, showing the symbols in an Apex class

The Explorer in the Side Bar also provides an Outline view to assist you while working on your project.

Syntax Errors

Any syntax errors such as a missing semi-colon or a bracket are marked with a red squiggly line in the editor. The Problems panel also lists the syntax errors. To go to the source file with the syntax error, double-click the error.

Problems view, showing a missing semicolon in an Apex class

Quick Fix

When you reference a method that isn’t declared in your source, use the Quick Fix widget to automatically declare the method.

Declare Missing Methods quick fix can be invoked in the following ways:

  • When you click the name of an undeclared method, a lightbulb appears on the left side of the editor window. Click the lightbulb and then click Create method ‘yourMethod’ in ‘yourClass‘ to make the quick fix.

GIF showing declare missing methods quick fix invocation via lightbulb

  • Hover over the method name and click Quick Fix in the pop-up window. Then, click Create method ‘yourMethod’ in ‘yourClass‘ to make the quick fix.

GIF showing declare missing methods quick fix invocation via window popup

Note: Keyboard shortcut for the Quick Fix widget is Cmd+. in macOS and Ctrl+. in Windows and Linux.

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