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IPC_ahaas
Super User
Super User

Filtering Using Table Relationships

I have two tables:

 

WoodLength 

Length WoodType 
40  
60  

 

WoodType

Type
CB
EB
RB

 

I thought I could have a reference column inside WoodLength with comma separated values for each WoodType associated.

After multiple tries not being able to get that to work, I added multiple (duplicate) entries in WoodLength for each WoodType

 

WoodLength

Length WoodType
40 CB
40 EB
60 CB
60 EB
80 RB

 

So while this works in data form, I can't seem how to get it to work in my app.

I have VarCreateBundleSelectedWoodType in my app, and when I try to use a Gallery to filter WoodLength items against it

 

 

Filter(WoodLengths,WoodType = VarCreateBundleSelectedWoodType)

 

 

it doesn't work and doesn't give me a good reason why.

I'd really like to know the proper way to setup this relationship before making the app work.

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
dpoggemann
Most Valuable Professional
Most Valuable Professional

Hi @IPC_ahaas ,

My thought is you should do the following here to handle your business need.  

 

Option 1

Two tables with N:N relationship

  1. Wood Length - this would only have the wood lengths available, no column on this table for the Wood Type
  2. Wood Type - this would only have the list of the possible wood types, no wood length on this table
  3. Setup a N:N relationship between the two tables in Dataverse

This configuration will allow you to identify multiple Wood Types with multiple lengths that are valid.

 

Option 2

Setup 3 tables, with one of them being intersect table.  This is the model I usually go with because I need metadata on the relationship vs. just having the N:N relationship.

  1. Setup table for Wood Types (same as option 1)
  2. Setup table for Wood Lengths (same as option 1)
  3. Setup intersect table called Wood Type Length (or something like that) that would contain two lookup fields (required), first to Wood Type table and the other to Wood Length table.  This will allow you to identify additional metadata fields on this table for the Wood Type / Length selection.
Hope this helps. Please accept if answers your question or Like if helps in any way.
Thanks,
Drew

View solution in original post

4 REPLIES 4
dpoggemann
Most Valuable Professional
Most Valuable Professional

Hi @IPC_ahaas ,

My thought is you should do the following here to handle your business need.  

 

Option 1

Two tables with N:N relationship

  1. Wood Length - this would only have the wood lengths available, no column on this table for the Wood Type
  2. Wood Type - this would only have the list of the possible wood types, no wood length on this table
  3. Setup a N:N relationship between the two tables in Dataverse

This configuration will allow you to identify multiple Wood Types with multiple lengths that are valid.

 

Option 2

Setup 3 tables, with one of them being intersect table.  This is the model I usually go with because I need metadata on the relationship vs. just having the N:N relationship.

  1. Setup table for Wood Types (same as option 1)
  2. Setup table for Wood Lengths (same as option 1)
  3. Setup intersect table called Wood Type Length (or something like that) that would contain two lookup fields (required), first to Wood Type table and the other to Wood Length table.  This will allow you to identify additional metadata fields on this table for the Wood Type / Length selection.
Hope this helps. Please accept if answers your question or Like if helps in any way.
Thanks,
Drew

Option 1 sounds like what I thought I was doing. Making a relationship between the two tables I assumed was handled via a lookup style column. So, I'm probably just doing this wrong.

 

Option 2 sounds good too, but when I consider the other tables I need to make (Wood Width, Wood Thickness) as separate relationships to Wood Type as well, I worry I'd have a lot of intersect tables and I'd get lost in my own data.

dpoggemann
Most Valuable Professional
Most Valuable Professional

Hi @IPC_ahaas ,

Looking at what you have above, not sure on that... In #1 you do not add the related lookup columns to either of the tables, you create the N:N relationship and Microsoft maintains this relationship table behind the scenes.  Create Many-to-many table relationships in Microsoft Dataverse using Power Apps portal - Power Apps ...

Hope this helps. Please accept if answers your question or Like if helps in any way.
Thanks,
Drew
IPC_ahaas
Super User
Super User

Thanks @dpoggemann, I'm going with Option 2 so I can see the table that houses the relationship matches between the other two tables.

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