Problem creating a nested collection

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Posted on by forstera

331

Hello all,

I need to create a nested collection of teachers' schedules and display them in a nested gallery.
I've been trying to create my collection for over 2 days now, without success:
The idea is as follows:
I have a sharepoint list with a ProfName, DayNumber, PeriodNumber and Class column.
In my application I have a choice list to search for a teacher. When my choice list is modified, I trigger the event and fill my Occupation collection as follows:
Create a collection of 5x13 elements (5 days and for each 13 teaching periods).
For each item in my suite, I search my sharepoint list for the day number (Value1 in my list), period number and teacher name.
Here's where I'm at, without success:

ClearCollect(
TimeTable;
ForAll(
[1; 2; 3; 4; 5]; // Boucle sur les jours de la semaine (1 = Lundi; 5 = Vendredi)
With(
DayNumber: Value; // Capture la valeur du jour dans une variable de contexte
DayName: Switch(
Value;
1; "Lundi";
2; "Mardi";
3; "Mercredi";
4; "Jeudi";
5; "Vendredi"
)
};
{
Day: DayNumber;
JourNom: DayName;
ListPeriodes: ForAll(
Sequence(13); // Boucle sur les périodes (de 1 à 13)
With(
{
ClasseValue: LookUp(
SharepointList;
DayNumber = Day && PeriodNumber = Value; // Utilisation de JourValeur et PeriodeValeur
Class
)
};
{
Periode: Value;
Matiere: Blank();
Classe: If(IsBlank(ClasseValue); Blank(); ClasseValue);
Remplacant: Blank();
Annotation: Blank()
}
)
)
}
)
)
)

The first error message says : DayNumber is invalid because unknown ..

Here's the place where my collection should be used :

So any idea is very welcomed :)

Categories:

Power Apps component framework

All responses (6)

Answers (2)

Verified answer

forstera 331 on at

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Problem creating a nested collection

According to this example , it seems my variables should be declared in { }

With({parentRecord:LookUp(colCustomerOrder, Firstname="Sally")}, With({orderTable:parentRecord.Orders}, UpdateIf(orderTable, Product="DVDs", {Quantity:5}); Patch(colCustomerOrder, parentRecord, {Orders:orderTable}) ) )

So I tried to modify the structure like this and it seems to work ..

ClearCollect(

EmploiDuTemps;

ForAll(

[1; 2; 3; 4; 5];

With(

{

DayNumber: Value;

DayName: Switch(

Value;

1; "Lundi";

2; "Mardi";

3; "Mercredi";

4; "Jeudi";

5; "Vendredi"

)

};

{ Periods: ForAll(

Sequence(13; 1; 1);

With(

{

ClasseValue: LookUp(

ListeHoraires;

Colonne1 = "TR_NAN" &&

Colonne4 = DayNumber &&

Colonne5 = Value;

Colonne3

)

};

{

Periode: Value;

Classe: If(IsBlank(ClasseValue); Blank(); ClasseValue);

Matiere: Blank();

Remplacant: Blank();

Annotation: Blank()

}

)

);

Day: DayNumber;

JourNom: DayName

}

)

)

)
mmbr1606 13,191 Super User 2025 Season 1 on at

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Problem creating a nested collection

Well then u simply need to Update your Code with the modification u made
forstera 331 on at

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Problem creating a nested collection

yes, I used it and it seems to have worked at one point (at least this part) but I've made so many changes to my structure that I don't know when ;sorry

Here's the complete structure :
mmbr1606 13,191 Super User 2025 Season 1 on at

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Problem creating a nested collection

i guess it does say

daynumber is not recognized? didnt you use this in your original code too?

cheers
forstera 331 on at

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Problem creating a nested collection

Dear mmbr1606,

Thanks very much for your proposition. so I pasted it to my application but I get the following error in the Lookup function :

(I had to change the columns name to fit my sharepoint list)

Here's my sharepoint list :

I get some troubles with my dropBox so, for the while, I fix a value to test the whole structure :

But I get that :

DayNumber is unknown..

Thanks very much for your help :)
Verified answer

mmbr1606 13,191 Super User 2025 Season 1 on at

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Problem creating a nested collection

hey

can u try this approach:

ClearCollect( TimeTable, ForAll( [1, 2, 3, 4, 5], With( { DayNumber: Value, DayName: Switch( Value, 1, "Lundi", 2, "Mardi", 3, "Mercredi", 4, "Jeudi", 5, "Vendredi" ), Periods: ForAll( Sequence(13, 1, 1), With( { ClasseValue: LookUp( SharePointList, ProfName = DropdownTeacher.Selected.Value && DayNumber = DayNumber && PeriodNumber = Value, Class ) }, { Periode: Value, Classe: If(IsBlank(ClasseValue), Blank(), ClasseValue), Matiere: Blank(), Remplacant: Blank(), Annotation: Blank() } ) ) }, { Day: DayNumber, JourNom: DayName, ListPeriodes: Periods } ) ) );

if it worked please mark as verified answer,

cheers