To read data from Salesforce, the Lightning web component can use the Reactive Wire service. The wire decorator is used to call an Apex method. In the following example, we call an Apex method using the wire decorator.
Full Answer
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.
Where does the Salesforce APEX method store data?
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.
How does Lightning Data Service handle data that's cached by Apex?
Note: Lightning Data Service is unaware of the data that's cached by Apex methods. When an LDS function updates a record, that update has no impact on data that was cached by an Apex method. Here’s an example of using @wire to call Apex. This code gets related contacts for an account.
How do I get data from Salesforce to lightning?
To read Salesforce data, Lightning web components use a reactive wire service. Use @wire in a component’s JavaScript class to specify an Apex method. You can @wire a property or a function to receive the data. To operate on the returned data, @wire a function.
Can Salesforce track your location?
Location Tracking: The location tracking feature supported by the Salesforce tracking software works amazingly towards tracking the current location of the sales agents, which is a prerequisite for keeping a track of their activities.
How do I find user location in Salesforce?
Using Salesforce to Track User's LocationFirst, let's create the object Sales Visit: ... Second, create an Apex Class (which performs like the Sales Visit but with a slightly different behavior): ... Create a Visualforce page that captures and sends the GPS coordinates of when the sales visit record is saved:More items...•
How do I use geolocation in Salesforce?
To use this feature, your administrator must enable the geo data integration rule for each object. For all other objects and editions, set values for latitude and longitude by using SOQL, Workbench, SOAP or REST API, or a geocoding service. You can then use address fields as locatable values.
Does Salesforce use GPS?
We keep it effortless and smart, using advanced GPS technology within Salesforce.
How do I query a geolocation field in Salesforce?
When using the GEOLOCATION function in SOQL queries, the geolocation field must precede the latitude and longitude coordinates. For example, DISTANCE(warehouse_location__c, GEOLOCATION(37.775,-122.418), 'km') works but DISTANCE(GEOLOCATION(37.775,-122.418), warehouse_location__c, 'km') doesn't work.
How do I turn off location tracking in Salesforce?
Individual mobile users can turn off location tracking for the Field Service mobile app from their phone's operating system settings. To exclude them from tracking at the admin level: From Setup, in the Quick Find box, enter Permission Sets , and then select Permission Sets.
Does Salesforce have geofencing?
You can use geofence messaging to message users arriving at an event or traveling to a new city. Note Use geofence locations with Location Entry and Location Exit message templates.
How do I create a Location field in Salesforce?
Creating a Geo-Location Field Data Type in Salesforce ObjectLogin to trailhead and Launch “trailhead playground” or “Developer Edition”Click the “Gear” icon and then click the “Setup” option.In the setup page, click the “Object Manager” at top of the page.More items...•
How do I enable geocode in Salesforce?
Steps to set up geocode clean rules:Login to the Salesforce org.Click on the Setup option upside right hand side.From Setup, enter Clean Rules in the Quick Find box, and select Clean Rules.Edit, next the geocode clean rule. ... Review the clean rule settings.Save the clean rule.Activate the clean rule.More items...
What is Salesforce maps?
Salesforce Maps is a location intelligence and map visualization tool that integrates with your Salesforce CRM, simplifying territory management. With Salesforce Maps you can create territories for your field sales reps and easily see the outcomes.
Do Salesforce flows work on mobile?
Salesforce for Android and iOS currently supports flows via the following methods only: Paused Flow Interviews app, which is made available via: Setup | Mobile Administration | Salesforce Navigation or via Lightning Setup: Apps | Mobile Apps | Salesforce | Salesforce Navigation. Flow Quick Action.
Usage
Before creating any location records, add at least one value to the Location Type picklist. LocationType is a required field.
Associated Objects
This object has the following associated objects. Unless noted, they are available in the same API version as this object.
Why use Apex?
Use Apex only if you need to customize your user interface to do more than what Lightning Data Service allows, such as using a SOQL query to select certain records. Apex provisions data that’s not managed and you must handle data refresh on your own.
What is Lightning Record Form?
The lightning:record*Form and force:recordData components are the easiest way to work with records. They are built on top of Lightning Data Service, which manages field-level security and sharing for you in addition to managing data loading and refresh. You can use these components for objects that are supported by User Interface API
What is a sobject in Lightning?
The term sObject refers to any object that can be stored in Lightning Platform. This could be a standard object, such as Account, or a custom object that you create, such as a Merchandise object. An sObject variable represents a row of data, also known as a record.
Can you use Apex in a scenario?
Use Apex only if you’re working with a scenario listed at Using Apex, You can call the Apex method imperatively, such as in response to a button click, as shown in the Loading Record Data from a Standard Object section.
What is an imported method in Apex?
The imported methods are functions that the component can call either via @wire or imperatively. Before you use an Apex method, make sure that there isn’t an easier way to get the data, for example, using a base Lightning component. See Data Guidelines.
What is system mode in Apex?
By default, Apex runs in system mode, which means that it runs with substantially elevated permissions, acting as if the user had most permissions and all field- and object-level access granted. Because these security layers aren’t enforced like they are in the Salesforce UI, you must write code to enforce them.
Can Apex mutate data?
Important Assume that Apex methods provision immutable data, even if it's possible to mutate the data today. It's a best practice to treat all data that a component receives as immutable. To mutate the data, make a shallow copy of the objects you want to mutate.
Apex in Lightning Web Components
We’ve covered the benefits of Lightning Data Service and how to use it, but sometimes, neither the lightning-record-*-form components nor the LDS wire adapters and functions suit a particular use case.
Use Apex Methods with Lightning Web Components
An Apex method used in a Lightning web component must be static, public or global, and annotated with @AuraEnabled immediately before the method definition. The @AuraEnabled annotation makes the Apex method available to Lightning components (both Lightning web components and Aura components).
Call Apex Methods from LWC
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.
Call Apex Imperatively
An alternative to calling Apex with @wire is to call Apex imperatively. 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.
Deploy a Lightning Web Component That Lists Records in a Table
Let’s work with an example that displays a list of existing Accounts in a lightning-datatable. We’ll use Apex and @wire to retrieve the records.
Hands-on Challenge
You’ll be completing this challenge in your own hands-on org. Click Launch to get started, or click the name of your org to choose a different one.