Skip to content

Instantly share code, notes, and snippets.

Created Jan 12, 2018
What would you like to do?
(Table as table, Parent as text, Child as text, Qty as text) =>
/* Debug parameters
Table = tblBOM,
Parent = "ProductAssemblyID",
Child = "ComponentID",
Qty = "PerAssemblyQty",
ChgTypeKeyCols = Table.Buffer(Table.TransformColumnTypes(Table,{{Parent, type text}, {Child, type text}})),
ReplaceNulls = Table.ReplaceValue(ChgTypeKeyCols ,null,"",Replacer.ReplaceValue,{Parent}),
MissingParents = List.Buffer(List.Select(List.Difference(List.Distinct(Table.Column(ReplaceNulls , Parent)), List.Distinct(Table.Column(ReplaceNulls , Child))), each _ <> "")),
CleanTable = Table.Buffer(Table.Combine({ReplaceNulls , #table({Child, Parent}, List.Transform(MissingParents, each {_, ""}))})),
// Start the iteration with the top-parents only
SelectTopParents = Table.SelectRows(CleanTable , each Record.Field(_, Parent)=""),
Custom1 = SelectTopParents,
// Add Path-column where the necessary 2 fields: Child and Qty are collected
AddPath = Table.AddColumn(Custom1, "Path", each #table({"Path_", "Qty_"}, {{Record.Field(_, Child), Record.Field(_, Qty)}})),
// Combine Parent and Child of the BOM-table as long as there are still new children in the next iteration step & write the elements into the Path-table
ResolveBOM = List.Generate(()=>
[Result=AddPath, Level=0],
each Table.RowCount([Result]) > 0,
each [ Result = let
A = Table.NestedJoin(ChgTypeKeyCols,{Parent},[Result],{Child},"NewColumn",JoinKind.Inner),
B = Table.ExpandTableColumn(A, "NewColumn", {"Path"}, {"PathOld"}),
C = Table.AddColumn(B,"Path", each Table.Combine({[PathOld], #table({"Path_", "Qty_"}, {{Record.Field(_, Child), Record.Field(_, Qty)}})}))
in C,
Level = [Level]+1 ]),
ConvertToTable = Table.FromList(ResolveBOM, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
ExpandBOM1 = Table.ExpandRecordColumn(ConvertToTable, Table.ColumnNames(ConvertToTable){0}, {"Level", "Result"}, {"Level", "Result"}),
ExpandBOM2 = Table.ExpandTableColumn(ExpandBOM1, "Result", Table.ColumnNames(ExpandBOM1[Result]{1})),
// Add a couple of fields/columns needed for the reports
AddFields = Table.AddColumn(ExpandBOM2, "NewFields", each [
TotalQty = List.Product([Path][Qty_]),
SpacedPath = Text.Repeat(" | ", [Level])&Record.Field(_, Child),
PathItems = [Path][Path_],
PathExplode = Text.Combine(PathItems, "/"),
// PathWhereUsed = Text.Combine(List.Reverse(PathItems), "/"),
TopParentProduct = PathItems{0} ]),
ExpandNewFields = Table.ExpandRecordColumn(AddFields, "NewFields", Record.FieldNames(AddFields[NewFields]{0})),
// Create column indicating if item is purchase item
PurchaseItems = Table.Buffer(Table.FromColumns({List.Difference(List.Distinct(Table.Column(ChgTypeKeyCols, Child)), List.Distinct(Table.Column(ChgTypeKeyCols, Parent)))})),
MergePurchaseItem = Table.NestedJoin(ExpandNewFields,{Child},PurchaseItems,{Table.ColumnNames(PurchaseItems){0}},"NewColumn",JoinKind.LeftOuter),
ExpandPurchaseItem = Table.ExpandTableColumn(MergePurchaseItem, "NewColumn", {Table.ColumnNames(PurchaseItems){0}}, {"PurchaseItem"}),
Cleanup1 = Table.RemoveColumns(ExpandPurchaseItem,{"PathOld", "Path", "PathItems"}),
Cleanup2 = Table.TransformColumnTypes(Cleanup1,{{Qty, type number}, {"TotalQty", type number}})
Copy link

mohamedabdelaziz15 commented Aug 21, 2019

Hi Imke,
After copying the query and pressing invoke it keep telling me that error:
Expression.Error: We cannot convert the value “tblBOM” to type Table.
What should I do?
Thanks in advance.

Copy link

ImkeF commented Nov 18, 2019

Sorry @mohamedabdelaziz15 , just recognized your comment now: You have to remove the quotes from the table name in the first function argument. so Query1(tblBOM... instead of Query1("tblBOM"...

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment