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Learning Salesforce Lightning Application Development
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If we have multiple custom components on a page with its own Apex controller, we can easily repeat SOQL queries.
Let's take a look at a scenario wherein multiple components have their own SOQL query, and there is no data sharing between components, as illustrated in the following diagram:
Lightning Data Service provides the following advantages:
The following diagram shows how the data flow is simplified with Lightning Data Service, with the ability to cache and share the data:
The force:recordData
component allows us to load the record from the Salesforce object, using recordId
. recordId
on the standard record page can be obtained by implementing the force:hasRecordId
interface, shown as follows:
<aura:component implements...