Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

The ultimate Microsoft Fabric, Power BI, Azure AI & SQL learning event! Join us in Las Vegas from March 26-28, 2024. Use code MSCUST for a $100 discount. Register Now

Reply
Scocal123
Helper I
Helper I

Crossfilter and row level security

Hello,

 

I have the following model for a report:

Scocal123_1-1670323115087.png

I've been asked to implement RLS and I'm having some trouble figuring out the correct method. 

 

In my original model table 1 does not exist and is not required. Table 1 is added for RLS amd contains a list of users email addresses, and the IDs which represent the rows I want the fact table, table 2, to filter to. One ID can be accessed my multiple users in table 1 which is why it is a many>many relationship. The RLS is setup to use Userprinciple name to filter table 1 and subsequently table 2. This element seems to work fine, as I can see when RLS is applied, table 2 does filter to the correct IDs the person in table 1 has access to. Due to table 2 being the fact table and on the many of the many>one side, it does not pass these filters through to the associated dimension tables. 

 

I have been reading into this as it is new to me, and thought I could use crossfilter within my measures to make the filters flow through to the dimension tables. As an example, for a measure that counts the rows in table 3 I thought I could try something like the below to count the total rows in table 3, but only for the rows which match those filtered in table 2:

 

CountRowsTable3 = CALCULATE(

                        COUNTROWS(Table3),

                        CROSSFILTER('Table2'[ColumnA],Table3[ColumnA],Both)

 

When I do this calc I still get the total number of rows in table 3 without the RLS applied. 

 

Grateful for any steers on the best way to do this, or if I am down totally the wrong track happy to be told so too!

Thank you

3 REPLIES 3
v-shex-msft
Community Support
Community Support

Hi @Scocal123,

I'd like to suggest you check the relationship direction to confirm these filter effect can correctly apply through these table relationship mappings.(single direction relationship only work on one side, you may need to modify some of them to both direction)

What is the Direction of Relationship in Power BI? - RADACAD

Regards.
Xiaoxin SHeng

Community Support Team _ Xiaoxin
If this post helps, please consider accept as solution to help other members find it more quickly.

Thank you for the response.

I have tried your suggestion. In the example above, when I use 'View as role' to check the RLS, I can see that table 1 filters to 2 rows with 2 IDs which is correct. These 2 IDs from table 1 succesfsully filter table 2. I have set the relationship direction to 'both' between table 2 and 3, but it does not perform any filters on table 3 and I am struggling to understand why. Any advice would be appreciated. 

Kind Regards

HI @Scocal123,

It sounds strange, I'd like to suggest you extract these three table to a standalone report to exclude other filter effects and try again.

Regards,

Xiaoxin Sheng

Community Support Team _ Xiaoxin
If this post helps, please consider accept as solution to help other members find it more quickly.

Helpful resources

Announcements
Fabric Community Conference

Microsoft Fabric Community Conference

Join us at our first-ever Microsoft Fabric Community Conference, March 26-28, 2024 in Las Vegas with 100+ sessions by community experts and Microsoft engineering.

February 2024 Update Carousel

Power BI Monthly Update - February 2024

Check out the February 2024 Power BI update to learn about new features.

Fabric Career Hub

Microsoft Fabric Career Hub

Explore career paths and learn resources in Fabric.

Fabric Partner Community

Microsoft Fabric Partner Community

Engage with the Fabric engineering team, hear of product updates, business opportunities, and resources in the Fabric Partner Community.

Top Solution Authors