Dax Expression for Dynamic Row level security

[Anonymous]

Hi I have the following model below which is linked via the Level 4 ID(highlighted in red). In order to avoid a many to many relationship i have created a bridge table(ruf contract bridge). i have already created a dynamic RLS on the corporate RLS Access table(picture 2) however i am wondering what dax expression do i need to create for the bridge table in order for this to filter the UK & ROI Monthly Debt tables i have? 

Picture 1

[v-shex-msft]

Hi @Anonymous,

You can also consider directly using the Dax expression to lookup values from the 'user' mapping table and extract the result to apply the filter on the bridge table. (it can be used without fact relationship)
Then you can set the RLS filter expression on the bridge table let other related tables with 'both' direction relationships enable RLS filters to tables. (notice: you need to ensure the RLS filter table and other table relationships direction are 'both' to expand the filter effects or it will be only enabled RLS on the filter table itself)

Regards,

Xiaoxin Sheng

[Anonymous]

Hi thanks for your response, Yes i understand that would be the easy fix and would work however was wondering about the other way to do it via DAX in which can filter these tables. 

[d_gosbell · Accepted solution]

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@Anonymous wrote:

Hi thanks for your response, Yes i understand that would be the easy fix and would work however was wondering about the other way to do it via DAX in which can filter these tables. 

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So if you want the harder to implement solution with worse performance you could probably do something like the following on the 'RUF Contract Bridge' table. 

'RUF Contract Bridge'[Level 4] in CALCULATETABLE( VALUES('Corporate RLS Access'[Level 4]), 'Corporate RLS Access'[Email] = USERPRINCIPALNAME() )

[d_gosbell]

Just change the filter direction of the relationship between the 'Corporate RLS Access' table and the 'RUF Contract Bridge' table to be bi-directional (so the arrows go both ways). And then your existing RLS filters will flow through to the other related tables.