I am creating new record using <lightning:recordEditForm>  and i am not able to populate lookup field onload finction. 
I tried below things but both are not working: 
1.

<lightning:inputField aura:id="caseLookup" type='String' fieldName ="Case__c" value="00842156"/>

2.

<lightning:inputField aura:id="caseLookup" fieldName ="Case__c"/>

Controller: 

onload : function(component, event, helper) { var parentId = component.get("v.parentId"); // requires inputFields to have aura:id component.find("caseLookup").set("v.value", "00842156"); },

Please help me here, I can do it using custom component but i want to use this. Or let me know if i can use something else to create new record of any object. 

prepopulate lookup field in lightning:recordeditform with lightning:inputfield

Hi All,
i am tryying to display account table in the component using table,td,tr
in this 1st coloum i need to display arrow and use expand and collapse for the remaining fields to display.

expected output:


Can any one help me to complete component.