{{appName}} (LDS)

• Data-Layer for Lightning (similar to Visualforce standard controller)
• Developers no longer have to write your own controller code
• All the data access code is contained within the LDS component force:recordData
• Significantly reducing the complexity of Lightning apps and pages

Combine Multiple data-requests on same record to single data-request

LDS Goals

• Minimize XMLHttpRequests (XHRs)
• Fetch records once, reducing network transfers, app server load, and database server load
• Cache record data on the client, separate from component metadata
• Share record data across components
• Enable progressive record loading, caching, and merging more fields and layouts into the cache
• Enable proactive cache population
• Promote consistency by using only one instance of the record data across multiple components
• Create notifications when record data changes

How to use LDS? - force:recordData

• input attributes:
  • recordId: Id of the sObject Record to load
  • mode: determines the behavior of notifications and what operations are available to perform with the record:
    • VIEW
    • EDIT
  • layoutType: to adapt to layout definitions:
    • FULL
    • COMPACT
  • fields: which fields in the record to query. example: "Name,BillingCity,BillingState"
• output attributes:
  • targetRecord: the attribute that will be populated with the loaded record
  • targetFields: populated with the simplified view of the loaded record
  • targetError: populated with any errors

Example

             
    ({
      handleRecordUpdated: function(component, event, helper) {
          var eventParams = event.getParams();
          if(eventParams.changeType === "LOADED") {
              // record is loaded (render other component which needs record data value)
              console.log("Record is loaded successfully.");
          } else if(eventParams.changeType === "CHANGED") {
              // record is changed
          } else if(eventParams.changeType === "REMOVED") {
              // record is deleted
          } else if(eventParams.changeType === "ERROR") {
              // there’s an error while loading, saving, or deleting the record
          }
      }
  })