There are several ways to execute Apex coding and programming on the Salesforce platform. The simplest one is using the Developer Console to execute code in an anonymous block. Let’s start by opening the console. Make sure your profile has the “Author Apex” permission enabled.
Full Answer
How do I run Salesforce apex programmatically?
You can access many features of the Salesforce user interface programmatically in Apex, and you can integrate with external SOAP and REST Web services. You can run Apex code using a variety of mechanisms. Apex code runs in atomic transactions. Develop your Apex code in a sandbox and debug it with the Developer Console and debug logs.
When should I use apex in Salesforce Lightning?
For example, when you want to customize a single-record data transaction, or perform multi-record operations on a single transaction, Apex is the best choice. An Apex method used in a Lightning web component must be static, public or global, and annotated with @AuraEnabled immediately before the method definition.
What can you do with apex?
Use Apex if you want to: Create Web services. Create email services. Perform complex validation over multiple objects. Create complex business processes that are not supported by workflow. Create custom transactional logic (logic that occurs over the entire transaction, not just with a single record or object).
How do I use apex commands?
Use the apex commands to create Apex classes, execute anonymous blocks, view your logs, run Apex tests, and view Apex test results. Creates an Apex class in the specified directory or the current working directory. If you don’t explicitly set the API version, it defaults to the current API version.
How do I use Apex repeat component?
apex:repeat is an iteration component that allows you to output the contents of a collection according to a structure that you specify....
How do I use Apex variable in Visualforce page?
A local variable that can be used as a replacement for a specified expression within the body of the component. Use
What is Pageblock in Salesforce?
An area of a page that uses styling similar to the appearance of a Salesforce detail page, but without any default content. This component supports HTML pass-through attributes using the "html-" prefix. Pass-through attributes are attached to the generated container
What is recordSetVar in Salesforce?
The recordSetVar attribute indicates that the page uses a list controller and the variable name of the record collection. This variable can be used to access data in the record collection.
How do you call APEX method in VisualForce page?
To call an Apex class from custom button or link on the object detail page, create a VisualForce page and call the Apex class method via the action attribute to make it work. Following is some sample code showing how to do that. The action method invoked when this page is requested by the server.
How do I pass parameters to a URL in Salesforce?
There are two ways to login and access into Salesforce from url.https://
What is Apex facet?
A placeholder for content that's rendered in a specific part of the parent component, such as the header or footer of an
What is Apex Param?
What is Pageblocking table?
apex:pageBlockTable is used to display list of data as a table within either an apex:pageBlock or apex:pageBlockSection component similar to a related list or list view in a standard Salesforce page.
What is StandardController in VF page?
A StandardController object that is automatically provided for standard and all custom objects, bindable to a Visualforce page component with the “standardController” attribute. It provides a reference to a single/list of record to a set of common actions for data processing and default navigation.
What is Apexpages StandardController?
StandardController objects reference the pre-built Visualforce controllers provided by Salesforce. The only time it is necessary to refer to a StandardController object is when defining an extension for a standard controller. StandardController is the data type of the single argument in the extension class constructor.
What is difference between controller and extension in Salesforce?
A controller extension is an Apex class that extends the functionality of a standard or custom controller. Use controller extensions when:You want to leverage the built-in functionality of a standard controller but override one or more actions, such as edit, view, save, or delete.
What is Apex in Salesforce?
Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on the Salesforce Platform server, in conjunction with calls to the API.
How to run Apex code?
Apex code runs in atomic transactions. Debugging, Testing, and Deploying Apex. Develop your Apex code in a sandbox and debug it with the Developer Console and debug logs. Unit-test your code, then distribute it to customers using packages. Apex Reference.
How to interact with Apex method?
There are two ways to interact with Apex methods from Lightning web components: either wire the method or call the method imperatively. Let’s consider both approaches.
When to call Apex?
Call Apex imperatively when you need to control the invocation of read operations, and when you modify records. To call Apex imperatively, you invoke Apex one time from a component’s JavaScript file instead of delegating control to the Lightning Web Components engine.
What is the apex method?
Lines 5–6: Initially, the Apex method provisions data to the contacts property, and stores that data in the LDS cache. Because $recordId is reactive, every time its value changes, the Apex method provisions new data, from either the cache or the server.
What to do if you use Trailhead in a different language?
If you use Trailhead in a language other than English, make sure that your hands-on org is set to the same language as the challenge instructions. Otherwise you may run into issues passing this challenge. Want to find out more about using hands-on orgs on Trailhead? Check out Trailhead Playground Management.
What is line 2 in Apex?
Line 2: We import the getRelatedContacts function from the AccountController Apex class. This points to the corresponding Apex method.
What happens in line 6 of Apex?
Lines 9–14: The imperative Apex call in line 6 returned a promise. If the Apex method call is successful, the promise is fulfilled and the then method runs. Otherwise, the promise is rejected and the catch method runs.
What lines are import field references?
Lines 2–4: We import field references, same as in the previous examples.
How to execute Apex code?
To execute your code interactively, run this command with no parameters. At the prompt, enter all your Apex code; press CTRL-D when you're finished. Your code is then executed in a single execute anonymous request.
Where is Apex class created?
Creates an Apex class in the specified directory or the current working directory. If you don’t explicitly set the API version, it defaults to the current API version. The .cls file and associated metadata file are created.
How many characters can you name an Apex trigger?
The name of the new Apex trigger. The name can be up to 40 characters and must start with a letter.
How many characters can an Apex class name be?
The name of the new Apex class. The name can be up to 40 characters and must start with a letter.
What happens if you don't supply apiversion?
If not supplied, the apiversion, template, and outputdir use default values.
Can you set the style of a li tag?
It's not possible to set the style of the li tag rendered by the <apex:dataList /> component using native tag attributes, as you've seen. In the style markup you can target the element using a parent/child declaration rather than targeting the li element itself.
Does Apex DataList have attributes?
apex:dataList doesn't appear to have any attributes that let you control the li tags it renders.
How to use Apex?
Other best practices for Apex include: 1 Bulkify your data manipulation language (DML) statements and use the built-in Limits methods. For more information about Limits methods, see the resources at the end of this unit. 2 Write comments with a good balance between quality and quantity (explain, but don't over-explain). Always provide documentation comments (method and class headers). Provide inline comments only when necessary to clarify complex code. 3 Avoid nesting loops within loops. 4 Avoid SOQL queries and DML statements inside loops. 5 Keep logic out of triggers. (Instead, use a trigger framework.) 6 Create relationships between objects to reduce your number of queries. 7 Avoid hard coded IDs and constants. 8 Increase readability by indenting code and breaking up long lines. 9 Break methods into multiple smaller methods if possible, making your code more modular and easier to read and maintain. 10 Last but not least: adhere to the security guidelines covered in the Develop Secure Web Apps trail. This includes declaring a sharing keyword for every class, and making efforts to prevent XSS and SQL injection.
How many Apex commands are there?
For more information on these and other best practices, see Apex Best Practices: The 15 Apex Commandments in the Resources section. If you are using Visual Studio Code as your IDE, consider using the Apex PMD extension (included in the Resources section) to automatically check your code for most best practices.
Why do developers write test classes?
When you write great code, you want to ensure that it doesn't interfere with your other great code, or get broken by great code you'll write in the future. That is why developers write test classes. The Salesforce documentation offers many test coverage best practices, so we won't reiterate those here. (For more information, see the Resources section.) What we will do, however, is encourage you to write your test classes as part of a process called test-driven development.
Do you need to use Apex?
Apex. The first rule of Apex is: You do not use Apex. Not when you don't need to. First, try to customize Salesforce by using the platform's built-in features, such as workflows, validation rules, and process builders. If you must use Apex code, aim for an 80:20 ratio of configuration to code. Other best practices for Apex include:
Do developers have to write comments?
Developers must write comments to explain their tests.
Where Is Apex Code Stored?
Where do I start, you ask? First things first, we need to figure out where we store our code. Code is stored in files. These files can be local (on your PC or Mac), in the cloud (your Salesforce org), or they can be saved locally and synced automatically to the cloud. How cool is that?
What is pseudocode in Salesforce?
Writing Pseudocode. The most important part of any project you participate in as a Salesforce Admin is planning. Planning helps you to understand the needs of your customers, organize your own thoughts, and predict issues that you may encounter while developing the application.
