lightning data service: eliminate your need to load records through controllers
TRANSCRIPT
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Loading data without Apex/SOQL in Lightning Components Lightning Data Service: Eliminate Your Need to Load Records Through Controllers
Carolyn Grabill SMTS Software Engineer [email protected] @CarolynCodes
Kevin Venkiteswaran PMTS Software Engineer [email protected] @kevinv11n
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Safe Harbor
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Agenda
• The Problem
• The <force:record> Component
• Demonstration + Code
• <force:record> in the Lightning Experience
• Roadmap
• Questions
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The Problem Many components need access to the same data
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Data re-use across components
Highlights and Details components display data from the same Opportunity record
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Multiple SOQL calls for the same data
Highlights cmp
Name: Acme Anvils Phone: (123) 456-7890
Details cmp
Name: Acme Anvils Phone: (123) 456-7890 Address: 123 Main St Amount: $500 Owner: Wile E. Coyote
Component controller
Apex controller SOQL
Component controller
Apex controller
SOQL
Client Server
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Multiple SOQL calls for the same data
Highlights cmp
Name: Acme Anvils Phone: (123) 456-7890
Details cmp
Name: Acme Anvils Phone: (123) 456-7890 Address: 123 Main St Amount: $500 Owner: Wile E. Coyote
Component controller
Apex controller SOQL
Component controller
Apex controller
SOQL
Client Server Lots of custom code!
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The <force:record> component
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<force:record> Standard component in “force” namespace (#SafeHarbor)
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Shared Record Cache
<force:record recordId=“001x00123” fields=“Id,Name” />
Client
Server
Fetches record
Auto SOQL
Automatic record loading
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Multiple SOQL calls for the same data
Highlights cmp
Name: Acme Anvils Phone: (123) 456-7890
Details cmp
Name: Acme Anvils Phone: (123) 456-7890 Address: 123 Main St Amount: $500 Owner: Wile E. Coyote
Component controller
Apex controller SOQL
Component controller
Apex controller
SOQL
Client Server
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<force:record> handles loading records
Highlights cmp
Name: Acme Anvils Phone: (123) 456-7890
Details cmp
Name: Acme Anvils Phone: (123) 456-7890 Address: 123 Main St Amount: $500 Owner: Wile E. Coyote
force:record controller
force:record
controller
<force:record>
Shared Record Cache
Consolidated requests
Client Server
<force:record>
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<force:record>
No server trip on cache hits!
Highlights cmp
Name: Acme Anvils Phone: (123) 456-7890
Details cmp
Name: Acme Anvils Phone: (123) 456-7890 Address: 123 Main St Amount: $500 Owner: Wile E. Coyote
force:record controller
force:record
controller
Shared Record Cache
Client Server
<force:record>
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<aura:component controller="MyApexController">
<aura:attribute name="recordId" type="String" /> <aura:attribute name="record" type="SObject" /> <aura:handler name="change” value="{!v.recordId}”
action="{!c.getRecord}"/> <ui:inputText label="Record Name"
value="{!v.record.Name}"/> </aura:component>
Simple refactor - BEFORE Lightning Component Apex Controller
public with sharing class MyApexController {
@AuraEnabled public static <SObject> getRecord(String recordId) {
return [SELECT Id, Name FROM <SObject> WHERE Id = :recordId];
}
}
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<aura:component>
<aura:attribute name="recordId" type="String" /> <aura:attribute name="record" type="SObject" /> <force:record recordId="{!v.recordId}"
targetRecord="{!v.record}" fields="Id, Name"/>
<ui:inputText label="Record Name"
value="{!v.record.Name}"/> </aura:component>
Simple refactor - AFTER Lightning Component No Apex Controller Needed
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• No Apex or SOQL
• Performance boost from client cache
• Data available offline
• Data consistency across components
• Automatic record refresh from server
• Automatic notification when record changes
• Components can be entity-agnostic
Benefits of <force:record> over custom record loading
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Demonstration
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Campground custom object
Two important fields:
• Name
• Location
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<force:record> in Lightning Experience
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Opportunity List Opportunity Record + hover on parent Account
Account Record
<force:record> in record browsing flow
Same Opportunity record in list view and highlights
Same Account record in preview and highlights components
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Page load time improved Experienced page time (milliseconds) before and after highlights component refactored to use <force:record>
0
200
400
600
800
1000
1200
1400
1600
Opportunities Accounts Users
Before <force:record>
After <force:record>
EPT
(ms)
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• No Apex or SOQL
• Performance boost from client cache
• Data available offline
• Data consistency across components
• Automatic record refresh from server
• Automatic notification when record changes
• Components can be entity-agnostic
Benefits of <force:record> over custom record loading
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Roadmap
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• More optimizations to record loading
• Proactive loading of records
• Advanced record loading with Aura method load()
• Deleting records with Aura method delete()
Future of <force:record>
• Saving records with Aura method save()
• Securely storing draft records when offline
• Supporting lists of records
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Thank you
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Questions?