Filter gallery on multiple items

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Posted on by Dulat

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I have two data sources.

Data1 have columns Class and NoteNumber.

So notes can be repeated in different classes.

Class1	Note1
Class1	Note2
Class1
Class2	Note1
Class2	Note3

Data2 have NoteNumbers and NoteDescription

Note1	Description1
Note2	Description2
Note3	Description3

Gallery1 is filtered by dropdown by Class.

We would like to show all Notes and Description in Gallery2.

So when Class 1 is selected, Note1 and 2 with descriptions are shown.

Selection of Class2 will show Note1 and 3 with descriptions.

Inner join of two tables basically, where first one is filtered.

Can someone advise how to filter Gallery2 effectively?

Thanks in advance!

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Building Power Apps

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Faisal__Wasim 56 on at

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Re: Filter gallery on multiple items

Hi @Dulat ,
Currently the relation you're showing is One - Many (Notes - Class) but it should be the other way round so you can Filter the 2nd Gallery with something like:
Filter(NotesDataSource, Class = Gallery1.Selected.Class)

Do let me know if you see any challenges, I am always happy to help.

Regards,
Faisal

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Dulat 102 on at

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Re: Filter gallery on multiple items

Hi Faisal.

Thanks for reply. It is not completely clear to me - I am very new in PowerApps.
My Data2 doesn't have any Class column. Do I need to reshape my data sources?

My goal is view are like these:
If I filtered Gallery1 to show only Class1, then I want have Gallery2 showing:
Note1 Description1
Note2 Description2

If I have chosen Class2, then Gallery 2 should be:
Note1 Description1
Note3 Description3

Thanks,
Dulat

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Faisal__Wasim 56 on at

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Re: Filter gallery on multiple items

Hi,
Yes your Data should look something like this:

Class1 Note1
Class1 Note2
Class1
Class2 Note1
Class2 Note3

Data2 must have a Class Column
Note1 Description1 Class1, Class2
Note2 Description2 Class1
Note3 Description3 Class2

Then you can use :

Filter(NotesDataSource, Gallery1.Selected.Class in ClassColumn)

or if you can make the Class table like this:

Class1 Note1, Note2
Class2 Note1, Note3
then you can use:

Filter(NotesDataSource, Notes in Gallery1.Selected.NotesColumn)

SP is not a Relational DB so its a little confusing.

Do let me know if you see any challenges, I am always happy to help.

Regards,
Faisal

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Dulat 102 on at

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Re: Filter gallery on multiple items

Hi Faisal,

Thanks! It is more clear now.
Is it possible to use something like combobox as a transitional item?
Pull there values from first Gallery or Dataset based on filter, and then use these values as a filter for second Gallery?
Dulat

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Faisal__Wasim 56 on at

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Re: Filter gallery on multiple items

Yes, I believe it may be possible. The Formula would be just a little complex. Can you try something like:

Filter(NotesDataSource, Notes in Concat(Filter(Gallery1.AllItems,Class = ClassDropdown.Selected.Value),NotesColumn&","))

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Dulat 102 on at

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Re: Filter gallery on multiple items

Hi Faisal,
Thanks for the help.
I was not able to apply your code directly to the gallery, but adopted your code by making unvisible text label in between.
Concat(Filter( collection, 'CLASS' = Filter_class.Selected.Value ), 'NOTE', ", " ).
Then I was filtering my gallery using values in this text label.
Filter(Notes data, NOTES in LabelFilteredNotes)

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