Expression backed record- rf variables are mapped properly

Question

Generally when we use entity backed record, and when we click on particular record we can access that record data using "rf!". 
 But I am using expression backed record 
 example I have a record with company employee cdt which has company id as one column. 
 Suppose for instance i have three companies and their ids are {15,16,17}. But these companies can have many employees. 
 So after you select a company it will redirect you to summary dashboard, and I can use rf!companyId to get all the employees 
 If I use entity backed record am getting 16 if I click on a record whose company id is 16. but it is not happening in case of expression backed record. 
 
 Did someone faced similar challenges.

aloks0189 · Accepted Answer

Hi Shivam Gupta As per my understanding, i would like to say 2 things, 
 
1) On Grid view of record, for the Link (the column value on which you want to have link to drill-down), following will be the configuration 
 Label: rf!nameFieldWhichYouWantToDisplay 
 Record Type: rp!type 
 Identifier: rf!companyId (It's the column which you are treating as PK in CDT) 
 
2) Under Summary View: Call an interface which will have a rule Input of type Integer for companyId, and fetch list of employees by this rule Input on load using Web-API 
So under Record Summary you can call this rule as 
 
 rule!yourSummaryView(rp!id)

As i have tried the same and it's working great, hope this will work for you as well, if you configure the Record properly as mention in above steps.