When using the Flowscreen lightning component for Dependent picklists I am encountering an error. The components is configured:
- Object API Name – the object where the picklists reside
- Picklist 2 API Name aka the dependent picklist
- Picklist 1 API Name aka the controlling picklist
- Picklist 1 value is a variable set by the record lookup
- Picklist 2 value is a variable set by the record lookup
When Running the flow:
- The Controlling Picklist (Picklist 1 API Name) is populated by the Picklist 1 Value set by the variable from the lookup.
- The Dependent Picklist (Picklist 2 API Name) is not populated by the Picklist 2 value set in the lookup.
- There is an error displayed at the bottom of the flow:
"This page has an error. You might just need to refresh it. Error in
$A.getCallback() [Cannot read property 'User Account Reset(s)' of
null] Callback failed:
serviceComponent://ui.interaction.runtime.components.controllers.DependentPicklistsController/ACTION$getDependencies
Failing descriptor: {flowruntime:dependentPicklists}"
FYI – Winter 19 added Dependent picklists for Flowscreens as a lightning component.
Release Notes: https://releasenotes.docs.salesforce.com/en-us/winter19/release-notes/rn_forcecom_flow_design_screencmp_dependentpicklists.htm
Release Readiness Live: https://www.youtube.com/watch?v=PSams5o8O10
Best Answer
The solution is simple actually it seems the standard DependentPicklist attempts to cache the initial values if they come directly from the object you have queried. To fix this issue, simply create a assignment element with the dependent and controlling picklist values as a text variable and use those values in Picklist 1 value, Picklist 2 value and even Picklist 3 value.