Record Changes

To perform tasks beyond rerendering the record when the record changes, handle the recordUpdated event. You can handle record loaded, updated, and deleted changes, applying different actions to each change type.

If a component performs logic that is record data specific, it must run that logic again when the record changes. A common example is a business process in which the actions that apply to a record change depending on the record’s values. For example, different actions apply to opportunities at different stages of the sales cycle.

Lightning Data Service notifies listeners about data changes only if the changed fields are the same as in the listener’s fields or layout.

Note

Example

Declare that your component handles the recordUpdated event.

1<force:recordData aura:id="forceRecord"
2    recordId="{!v.recordId}" 
3    layoutType="FULL"
4    targetRecord="{!v._record}"
5    targetFields="{!v.simpleRecord}"
6    targetError="{!v._error}"
7    recordUpdated="{!c.recordUpdated}" />

Implement an action handler that handles the change.

1({
2  recordUpdated: function(component, event, helper) {
3
4    var changeType = event.getParams().changeType;
5
6    if (changeType === "ERROR") { /* handle error; do this first! */ }
7    else if (changeType === "LOADED") { /* handle record load */ }
8    else if (changeType === "REMOVED") { /* handle record removal */ }
9    else if (changeType === "CHANGED") { /* handle record change */ }
10})

When loading a record in edit mode, the record is not automatically updated to prevent edits currently in progress from being overwritten. To update the record, use the reloadRecord method in the action handler.

1<force:recordData aura:id="forceRecord"
2    recordId="{!v.recordId}" 
3    layoutType="FULL"
4    targetRecord="{!v._record}"
5    targetFields="{!v.simpleRecord}"
6    targetError="{!v._error}"
7    mode=”EDIT”
8    recordUpdated="{!c.recordUpdated}" />

1({
2  recordUpdated : function(component, event, helper) {
3
4    var changeType = event.getParams().changeType;
5
6    if (changeType === "ERROR") { /* handle error; do this first! */ }
7    else if (changeType === "LOADED") { /* handle record load */ }
8    else if (changeType === "REMOVED") { /* handle record removal */ }
9    else if (changeType === "CHANGED") { 
10      /* handle record change; reloadRecord will cause you to lose your current record, including any changes you’ve made */ 
11      component.find("forceRecord").reloadRecord();}
12    }
13})

Lightning Components Developer Guide

Record Changes

Example