OK gurus of PowerApps -- need your wisdom once again.Details:Data source is a Sharepoint list.Screen1 has a very complex On Visible event that builds

LO AND BEHOLD - after MUCH wailing and gnashing of teeth - I figured out what the problem was. I was right! There was no problem with my c

Solved: Question about On Visible after Back()

OK gurus of PowerApps -- need your wisdom once again.

Details:

Data source is a Sharepoint list.
Screen1 has a very complex On Visible event that builds a collection used to display a report in a gallery on Screen 1.
User can click on a detail line in the report on Screen 1 and be taken to the edit form for the selected item in Screen 2.
User makes a changes to the item on the edit form in Screen 2 and a submit form posts the change. The On Success fires for the form which executes a Back(), displaying Screen 1 again.
All is well EXCEPT that the change made in the edit form is not being reflected in the gallery on Screen 1.
I tried using a Navigate to return to Screen 1 instead of a Back and the result was the same.
I also tried issuing a refresh on the SP list I updated prior to doing the Back and the result was the same.
If I try to re-edit the same item, I get an item not found on Screen 2 because I am matching on the text to find the correct item in the SP list that matches the item in the collection. (This is what I would expect to happen). If I cancel out of Screen 2 (which executes a ResetForm then a Back), the data in the gallery IS in fact refreshed.

Questions:

Isn't the On Visible supposed to fire each time Screen 1 becomes visible?
Do I need to also patch the collection with the change at the same time I process the Submit form? I would not have expected to do this as I would have thought the On Visible would simply rebuild with the latest information when I did the Back.
What else can I do to insure the gallery reflects the change when I return to Screen 1?

Thanks in advance!

Categories:

General Questions

I can find no conditionals or errors which would prevent the update. I have used a label to verify that the On Visible IS being invoked -- but the collection is NOT being updated when returning from the update on Screen 2. I have tried forcing a refresh of the list when leaving Screen 2, but Screen 1 still does not update. I have tried returning to Screen 1 with a Navigate rather than a Back, but Screen 1 still does not update. Yet when I exit from Screen 1 to the Home Page and invoke Screen 1 again, it DOES update.

Here's the On Visible code:

Set(
 RptPopUpVisible,
 false
);
Set(StartDate,DateAdd(dpWeekEndDate.SelectedDate,-6));
Clear(multiList);
// Skeleton structure of what is about to happen:
//
// ForAll(shaped and grouped Data, 
// collect-departments into multiList; 
// ForAll(projects in department groups, 
// collect-projects into multiList; 
// ForAll(stones in project groups, 
// collect-Accomp into multiList
// )
// )
// )
ForAll(
 //We need to group two levels - one for the inner accomplishments grouped by Department and Project (records are the (Accomp)lishments)
 //We need to compare a few things in the later levels, so we also need to add the department and project in the 
 // appropriate places - this will speed up the lookups in the ForAlls
 SortByColumns(
 GroupBy(
 SortByColumns(
 AddColumns(
 GroupBy(
 AddColumns(
 SortByColumns(
 Filter(
 PA,
 Archive = false
 ),
 "Title"
 ),//Sort the list so Accomplishments (PA) are in order
 "dep",
 DepartmentName.Value,
 "proj",
 ProjectName.Value
 ),//AddColumns - Put the dep and proj on the records of all milestones
 "dep",
 "proj",
 "accomp"
 ),// LEVEL 2 GroupBy - group by the department and project and give us a table of accomp
 "depL2",
 dep
 ),// AddColumns add the department at LEVEL 2 as well (but a different name)
 "proj"
 ),// SortBy Project Column
 "depL2",
 "Projects"
 ),// LEVEL 1 GroupBy - finally group by the Department with a table of projects
 "depL2"
 ),// SortByColumns - Sort by Department Column
 //The stage is set....Now lets collect some records 
 // DEPARTMENTS
 // Here we are on the outside of the groups - we have a Department column and a table column of Project Records
 // REMEMBER: we are in a ForAll function - this is the FIRST statement of the ForAll...a Collect function
 Collect(
 multiList,
 //Every record in our final collection should have a DataLevel (used only during this compilation, a DepLevel, which is the caclulated Department
 //level, a Project Level - a calculation of the project level, and a milestonelevel - also calculated
 {
 DataLevel: 1,
 // we use the datalevel for our filter statements only, this is level 1
 DeptLevel: CountRows(Filter(multiList, DataLevel = 1)) + 1,
 //count the number of rows in our collection that are at this datalevel, we should be the next one
 ProjLevel: 0,
 // we're at the department level now, so all records have 0 project
 PALevel: 0,
 // we're at the department level now, so all records have 0 PA
 myDept: depL2,
 //and of course, the real data...the department name at this point is all we care about
 sortKey: Text(CountRows(Filter(multiList, DataLevel = 1))+ 1,"[$-en-US]000") & "000" & "000"
 }
 );
 
 // PROJECTS 
 // Now lets collect with the Departments' Projects - here we go into the Projects tables of the group
 // REMEMBER: we are in a ForAll function - this is the SECOND (and last) statement of the outer ForAll...this final statement is a ForAll 
 // Here we are working with the Projects table column from the outer group LEVEL 1
ForAll(
 Projects,
 Collect(
 multiList,
 {
 DataLevel: 2,
 // we use the datalevel for our filter statements only, this is level 2
 DeptLevel: LookUp(multiList, myDept = dep).DeptLevel,
 // in this level, we look up the department level for this department that was collected before
 ProjLevel: CountRows(Filter(multiList, DataLevel = 2)) + 1,
 // count the number of rows in our collection that are at this datalevel, we are the next one
 PALevel: 0,
 //we're at the project level now, so 0 PA
 myDept: depL2,
 //and of course, the real data...the department name
 myProject: proj,
 // and the project name
 sortKey: Text(LookUp(multiList, myDept = dep).DeptLevel,"[$-en-US]000") & Text(CountRows(Filter(multiList, DataLevel = 2)) + 1,"[$-en-US]000") & "000"
 }
 );
 Collect(
 multiList,
 {
 DataLevel: 3,
 // we use the datalevel for our filter statements only, this is level 2
 DeptLevel: LookUp(multiList, myDept = depL2).DeptLevel,
 // in this level, we look up the department level for this department that was collected before
 ProjLevel: CountRows(Filter(multiList,DataLevel = 2)), // we look up the project level for this project that was collected before
 PALevel: 1, //we're at the project level now, so 0 PA
 myDept: depL2, //and of course, the real data...the department name
 myProject: proj, // and the project name
 PA: "Accomplishments",
 PAType: " ",
 sortKey: Text(LookUp(multiList,myDept = depL2).DeptLevel,"[$-en-US]000") & Text(CountRows(Filter(multiList, DataLevel = 2)),"[$-en-US]000") & "001"
 }
 );
 
 // ACCOMPLISHMENTS 
 // we are in the Projects grouping...so let's grab the Accomp as well now
 // REMEMEBER: We are the second statement in the Last statement of the outer ForAll
 // Here we are working with the Accomp table column from the inner group LEVEL 2
ForAll(
 Projects[@accomp],
 Collect(
 multiList,
 {
 DataLevel: 3, // we use the datalevel for our filter statements only, this is level 3
 DeptLevel: LookUp(multiList, myDept = dep).DeptLevel, // in this level, we look up the department level for this department that was collected before
 ProjLevel: CountRows(Filter(multiList, DataLevel = 2)),
 // we look up the project level for this project that was collected before
 //now count the rows that are associated with the dept and proj - we are the next one.
 PALevel: CountRows(Filter(multiList, myDept = depL2 && myProject = proj && DataLevel = 3)),
 // And finally, all the real data that we need for the final list
 myDept: depL2,
 myProject: proj,
 PA: Title,
 PAD: AdditionalDetail,
 PAType: "A",
 RptDate: StatusDate,
 ID: ID,
 sortKey: Text(LookUp(multiList, myDept = dep).DeptLevel,"[$-en-US]000") & Text(CountRows(Filter(multiList, DataLevel = 2)),"[$-en-US]000") & 
 Text(CountRows(Filter(multiList, myDept = depL2 && myProject = proj && DataLevel = 3)),"[$-en-US]000")
 }
 )//end of accomp Collect 
 )// end of accomp ForAll 
 )// end of Projects ForAll
);
// end of grouped ForAll
//REPEAT THE ENTIRE PROCESS FOR NEXT STEPS BUT ONLY WRITE OUT THE NEXT STEPS HEADER AND DATALEVEL 3 RECORDS
 //We need to group two levels - one for the inner next steps grouped by Department and Project (records are the Steps)
 //We need to compare a few things in the later levels, so we also need to add the department and project in the 
 // appropriate places - this will speed up the lookups in the ForAlls
ForAll(
 SortByColumns(
 GroupBy(
 SortByColumns(
 AddColumns(
 GroupBy(
 AddColumns(
 SortByColumns(
 Filter(
 NextSteps,
 Archive = false
 ),
 "Title"
 ),//Sort the list so NextSteps are in order
 "dep",
 DepartmentName.Value,
 "proj",
 ProjectName.Value
 ),//AddColumns - Put the dep and proj on the records of all NextSteps
 "dep",
 "proj",
 "Steps"
 ),// LEVEL 2 GroupBy - group by the department and project and give us a table of Steps
 "depL2",
 dep
 ),// AddColumns add the department at LEVEL 2 as well (but a different name)
 "proj"
 ),// SortBy Project Column
 "depL2",
 "Projects"
 ),// LEVEL 1 GroupBy - finally group by the Department with a table of projects
 "depL2"
 ),// SortByColumns - Sort by Department Column
 //The stage is set....Now lets collect some records 
 // PROJECTS 
 // Now lets collect with the Departments' Projects - here we go into the Projects tables of the group
 // REMEMBER: we are in a ForAll function - this is the SECOND (and last) statement of the outer ForAll...this final statement is a ForAll 
 // Here we are working with the Projects table column from the outer group LEVEL 1
 ForAll(
 Projects,
 Collect(
 multiList,
 {
 DataLevel: 3,
 // we use the datalevel for our filter statements only, this is level 2
 DeptLevel: LookUp(multiList,myDept = depL2).DeptLevel,
 // in this level, we look up the department level for this department that was collected before
 ProjLevel: LookUp(multiList, myDept = depL2 && myProject = proj && DataLevel = 2).ProjLevel,
 // we look up the project level for this project that was collected before
 PALevel: CountRows(Filter(multiList, myDept = depL2 && myProject = proj && DataLevel = 3)),
 //we're at the project level now, so 0 PA
 myDept: depL2,
 //and of course, the real data...the department name
 myProject: proj,
 // and the project name
 PA: "Next Week",
 PAType: " ",
 sortKey: Text(LookUp(multiList, myDept = depL2).DeptLevel,"[$-en-US]000") & 
 Text(LookUp(multiList, myDept = depL2 && myProject = proj && DataLevel = 2).ProjLevel,"[$-en-US]000") & 
 Text(CountRows(Filter(multiList, myDept = depL2 && myProject = proj && DataLevel = 3)),"[$-en-US]000")
 }
 );
 
 // NEXT STEPS/NEXT WEEK 
 // we are in the Projects grouping...so let's grab the Steps as well now
 // REMEMEBER: We are the second statement in the Last statement of the outer ForAll
 // Here we are working with the Steps table column from the inner group LEVEL 2
ForAll(
 Projects[@Steps],
 Collect(
 multiList,
 {
 DataLevel: 3,
 // we use the datalevel for our filter statements only, this is level 3
 DeptLevel: LookUp(multiList, myDept = dep).DeptLevel,
 // in this level, we look up the department level for this department that was collected before
 ProjLevel: LookUp(multiList, myDept = depL2 && myProject = proj && DataLevel = 2).ProjLevel,
 // we look up the project level for this project that was collected before
 //now count the rows that are associated with the dept and proj - we are the next one.
 PALevel: CountRows(Filter(multiList,myDept = depL2 && myProject = proj && DataLevel = 3)),
 // And finally, all the real data that we need for the final list
 myDept: depL2,
 myProject: proj,
 PA: Title,
 PAD: AdditionalDetails,
 PAType: "N",
 RptDate: StatusDate, 
 ID: ID,
 sortKey: Text(LookUp(multiList, myDept = dep).DeptLevel,"[$-en-US]000") & 
 Text(LookUp(multiList, myDept = depL2 && myProject = proj && DataLevel = 2).ProjLevel,"[$-en-US]000") & 
 Text(CountRows(Filter(multiList, myDept = depL2 && myProject = proj && DataLevel = 3)),"[$-en-US]000")
 }
 )//end of Steps Collect 
 )// end of Steps ForAll 
 )// end of Projects ForAll
);
// end of Group ForAll

The OnSelect that applies the update on screen 2 is:

Patch(Audit,Defaults(Audit),{Title:"Next Steps",UpdateDate:Now(),DepartmentName:{Id:LookUp(Department, Dept in Title,ID),
Value: Dept,'@odata.type':"#Microsoft.Azure.Connectors.SharePoint.SPListExpandedReference"}, 
ProjectName:{Id:LookUp(Projects, Proj in Title,ID),
Value: Proj,'@odata.type':"#Microsoft.Azure.Connectors.SharePoint.SPListExpandedReference"}});
SubmitForm(EditNext);Patch(Department,First( Filter( Department, Title = Dept ) ), { DataLastUpdt: Today() } )

And the Success event for the form is simply: