For Lightning components, Salesforce added a new Feature - Lightning Data Service (LDS) in its Winter ‘17 release. We can use LDS in our Lightning components to perform various CRUD operations like create, read, update or delete a record without the use of any Apex code. This automatically gives us enhanced performance and UI consistency.
One of the biggest advantages of Lightning Data Service is that it ensures UI consistency across Lightning components. This works best when combined with the Salesforce Lightning Design System (SLDS) , which provides standardized styles, layouts, and components. By following SLDS guidelines, developers can build Lightning components that not only perform well with LDS but also maintain a consistent and modern user experience.
As in Visualforce pages, we use ‘Standard Controller’ for basic CRUD operations, similarly, LDS can be used in Lightning components. LDS serves as the ‘data layer’ for Lightning. Without LDS, every Lightning component makes separate calls to the server to fetch the relevant data. This results in reduced performance, and sometimes: inconsistencies in data.
Lightning Data Service identifies all the requests to the server which relate to the same record data and then sends a single shared data request to the server which updates all the relevant components. This method automatically gets rid of data inconsistencies. When one component updates a record, other components using the same record are notified and refreshed. LDS also saves the data in cache so that if the user gets disconnected and is working offline, it automatically syncs the data as soon as the connection is up.
- Minimizing XMLHttpRequests (XHRs).
- Save record data on the client in cache, enabling proactive cache population.
- Eliminates data inconsistencies.
- Gives notifications when a record’s data is changed.
- Sharing a record’s data between different components.
LDS has largely simplified the coding aspect of Lightning components. No Apex controller code is required as all the code used to access the record’s data is consolidated within the LDS component. This results in lowering the complexity of components, and therefore, quality and performance increases.
To use Lightning Data Service in a component, we have to include force:recordData tag. Then, we set the recordId, mode, layoutType or Fields attributes. All these attributes work to specify the record’s ID, the list of fields which need to be queried and the attribute to which this record is to be assigned.
Here, an important point to note is that force:recordData doesn’t provide any UI elements to the component, it is just a simple medium to communicate with the server.
Different Aura methods are provided which can be used in the component’s JavaScript controllers. These methods help in doing modifications on the available record:
- reloadRecord()
- getNewRecord()
- deleteRecord()
- saveRecord()
In real-world Lightning components, Lightning Data Service is often used together with custom buttons and JavaScript actions. For example, clicking a button can trigger LDS methods such as saveRecord() or deleteRecord() without requiring Apex controllers. This approach simplifies development and keeps logic client-side. To understand how UI actions integrate with Lightning components, refer to Lightning and JavaScript Buttons, which explains how buttons can invoke JavaScript logic in Lightning Experience.
- For now, LDS doesn’t support all the objects. For a list of supported objects, please refer to Lightning Data Service Considerations
- Lightning Data Service can only be used in Lightning Experience and Salesforce app. It cannot be used in Lightning components for Visualforce pages or other containers.
- LDS only supports one operation in one transaction. To perform more operations in a single transaction, we have to use Apex code.
Lightning Data Service plays an important role in Sales Cloud by powering responsive and efficient Lightning components for objects such as Leads, Accounts, and Opportunities. Sales teams benefit from real-time data updates, reduced server calls, and consistent UI behavior across the platform. To explore how Lightning components and LDS support sales processes end to end, visit the Salesforce Sales Cloud page.
https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/data_service.htm
If you have any query regarding Lightning Data Service or if you want to discuss your requirements regarding the same, please connect with Astrea IT Services at sales@astreait.com
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