Cascading, but independent, comboboxes filtering/filling each other

[camarant]

Hi, I need some help with the following case: 

I have a modal (img below), with 4 comboboxes (Control names in order: insertComboPrograma, insertComboProjeto, insertComboInternalProduct (changed bc of company policy) and insertComboDescInternalProduct (changed bc of company policy)), the datasource is a SP list and all fields are Text.

My data has the following properties:

• Programa: is a column with values that repeat itself, that i'm filtering with Distinct
• Projeto: is a columns with values that also repeat itself , but also has some unique ones that i'm filtering with Distinct;
• InternalProduct: is my internal company ID of the product, it is formed by strings and numbers;
• Descrição InternalProduct: detailed description of my internal company ID product;
• I also have a column with a unique ID, called ID.

The behavior that i'm looking for, is the following: 

1. If user start by insertComboPrograma, it filters the subsequent combobox, with respective values, however the order does not matter, if he wants to jump, from Programa, directly into the insertComboInternalProduct, it should also finish the filtering of remanescent comboboxes and fill them, in case the result is a single value;
2. If user starts by insertComboProjeto, it should filter, show the respective values, and fill the comboboxes, in case there's only one result;
3. If user starts by insertComboDescInternalProduct, it should filter, show values and fill in case of a single result;
4. Same behavior for insertComboDescInternalProduct.

Summary: it really does not matter the order of choice, the program needs to always fill the fields, if the result is a single value for each combo.  

At this point, I am able to filter the data correctly and show the distinct values, however I can't figure it out a way to force the DefaultSelectedItem to respect my rules. Right now, this is what I have in my properties trigger. Most of my code is similar, but with only a few changes, bases on my intermediate knowledge that i've acquired with not much resource/time: 

Items of insertComboPrograma:

Sort(

    Distinct(

        Filter(

            colInternalProduct,

            IsBlank(varProjeto) || Projeto = varProjeto,

            IsBlank(varInternalProduct) || InternalProduct = InternalProduct,

            IsBlank(varDescricaoInternalProduct) || Descricao_InternalProduct = varDescricaoInternalProduct,

            Ativo = 1

        ),

        Programa

    ),

    Value,

    SortOrder.Ascending

).Value

OnChange of insertComboPrograma:

/* ----------------- getIDVALUE ----------------*/

UpdateContext(

    {getValueForID:

        LookUp(

            colInternalProduct,

            ID in Filter(colInternalProduct,

                        Programa = insertComboPrograma.Selected.Value ||

                        Projeto = insertComboProjeto.Selected.Value ||

                        InternalProduct = insertComboInternalProduct.Selected.InternalProduct ||

                        Descricao_InternalProduct = insertComboDescInternalProduct.Selected.Value).ID &&

                        Ativo = 1, ID

                    )

    }

);

/* ----------------- getPROJETO ----------------*/

UpdateContext(

    {getProjetoValue:

        LookUp(

            colInternalProduct,

            Projeto = LookUp(colInternalProduct, getValueForID = ID, Projeto),

            Projeto

        )

    }

);

/* -------------------- getInternalProduct ---------------------*/

UpdateContext(

    {getInternalProductValue:

        LookUp(

            colInternalProduct,

            InternalProduct = LookUp(colInternalProduct, getValueForID = ID, InternalProduct),

            InternalProduct

        )

    }

);

/* -------------------- getDESCRICAOInternalProduct ---------------------*/

UpdateContext(

    {getDescricaoInternalProductValue:

        LookUp(

            colInternalProduct,

            Descricao_InternalProduct = LookUp(colInternalProduct, getValueForID = ID, Descricao_InternalProduct),

            Descricao_InternalProduct

        )

    }

);

Items of insertComboProjeto:

Sort(

    Distinct(

        Filter(

            colInternalProduct,

            IsBlank(varProjeto) || Projeto = varProjeto,

            IsBlank(varInternalProduct) || InternalProduct = InternalProduct,

            IsBlank(varDescricaoInternalProduct) || Descricao_InternalProduct = varDescricaoInternalProduct,

            Ativo = 1

        ),

        Projeto

    ),

    Value,

    SortOrder.Ascending

).Value

OnChange of insertComboProjeto:

/* ----------------- getIDVALUE ----------------*/

UpdateContext(

    {getValueForID:

        LookUp(

            colInternalProduct,

            ID in Filter(colInternalProduct,

                        Programa = insertComboPrograma.Selected.Value ||

                        Projeto = insertComboProjeto.Selected.Value ||

                        InternalProduct = insertComboInternalProduct.Selected.InternalProduct ||

                        Descricao_InternalProduct = insertComboDescInternalProduct.Selected.Value).ID &&

                        Ativo = 1, ID

                    )

    }

);

/* ----------------- getPROGRAMA ----------------*/

UpdateContext(

    {getProgramaValue:

        LookUp(

            colInternalProduct,

            Programa = LookUp(colInternalProduct, getValueForID = ID, Programa),

            Programa

        )

    }

);

/* -------------------- getInternalProduct ---------------------*/

UpdateContext(

    {getInternalProductValue:

        LookUp(

            colInternalProduct,

            InternalProduct = LookUp(colInternalProduct, getValueForID = ID, InternalProduct),

            InternalProduct

        )

    }

);

/* -------------------- getDESCRICAOInternalProduct ---------------------*/

UpdateContext(

    {getDescricaoInternalProductValue:

        LookUp(

            colInternalProduct,

            Descricao_InternalProduct = LookUp(colInternalProduct, getValueForID = ID, Descricao_InternalProduct),

            Descricao_InternalProduct

        )

    }

);

Items of insertComboInternalProduct:

Sort(

    Distinct(

        Filter(

            colInternalProduct,

            IsBlank(varProjeto) || Projeto = varProjeto,

            IsBlank(varInternalProduct) || InternalProduct = InternalProduct,

            IsBlank(varDescricaoInternalProduct) || Descricao_InternalProduct = varDescricaoInternalProduct,

            Ativo = 1

        ),

        InternalProduct

    ),

    Value,

    SortOrder.Ascending

).Value

OnChange of insertComboInternalProduct:

/* ----------------- getIDVALUE ----------------*/

UpdateContext(

    {getValueForID:

        LookUp(

            colInternalProduct,

            ID in Filter(colInternalProduct,

                        Programa = insertComboPrograma.Selected.Value ||

                        Projeto = insertComboProjeto.Selected.Value ||

                        InternalProduct = insertComboInternalProduct.Selected.InternalProduct ||

                        Descricao_InternalProduct = insertComboDescInternalProduct.Selected.Value).ID &&

                        Ativo = 1, ID

                    )

    }

);

/* ----------------- getPROGRAMA ----------------*/

UpdateContext(

    {getProgramaValue:

        LookUp(

            colInternalProduct,

            Programa = LookUp(colInternalProduct, getValueForID = ID, Programa),

            Programa

        )

    }

);

/* ----------------- getPROJETO ----------------*/

UpdateContext(

    {getProjetoValue:

        LookUp(

            colInternalProduct,

            Projeto = LookUp(colInternalProduct, getValueForID = ID, Projeto),

            Projeto

        )

    }

);

/* -------------------- getDESCRICAOInternalProduct ---------------------*/

UpdateContext(

    {getDescricaoInternalProductValue:

        LookUp(

            colInternalProduct,

            Descricao_InternalProduct = LookUp(colInternalProduct, getValueForID = ID, Descricao_InternalProduct),

            Descricao_InternalProduct

        )

    }

);

Items of insertComboDescInternalProduct:

Sort(

    Distinct(

        Filter(

            colInternalProduct,

            IsBlank(varProjeto) || Projeto = varProjeto,

            IsBlank(varInternalProduct) || InternalProduct = InternalProduct,

            IsBlank(varDescricaoInternalProduct) || Descricao_InternalProduct = varDescricaoInternalProduct,

            Ativo = 1

        ),

        Descricao_InternalProduct

    ),

    Value,

    SortOrder.Ascending

).Value

OnChange of insertComboDescInternalProduct:

/* ----------------- getIDVALUE ----------------*/

UpdateContext(

    {getValueForID:

        LookUp(

            colInternalProduct,

            ID in Filter(colInternalProduct,

                        Programa = insertComboPrograma.Selected.Value ||

                        Projeto = insertComboProjeto.Selected.Value ||

                        InternalProduct = insertComboInternalProduct.Selected.InternalProduct ||

                        Descricao_InternalProduct = insertComboDescInternalProduct.Selected.Value).ID &&

                        Ativo = 1, ID

                    )

    }

);

/* ----------------- getPROGRAMA ----------------*/

UpdateContext(

    {getProgramaValue:

        LookUp(

            colInternalProduct,

            Programa = LookUp(colInternalProduct, getValueForID = ID, Programa),

            Programa

        )

    }

);

/* ----------------- getPROJETO ----------------*/

UpdateContext(

    {getProjetoValue:

        LookUp(

            colInternalProduct,

            Projeto = LookUp(colInternalProduct, getValueForID = ID, Projeto),

            Projeto

        )

    }

);

/* -------------------- getInternalProduct ---------------------*/

UpdateContext(

    {getInternalProductValue:

        LookUp(

            colInternalProduct ,

            InternalProduct = LookUp(colInternalProduct, getValueForID = ID, InternalProduct),

            InternalProduct

        )

    }

);

DefaultSelectedItems for all combos are similar, only changing the variable name: one thing that haven't been able to figure it out, is which comparison i should do to fill the combo, i've tried using the comoboboxname.Selected.Value, it also didn't workout for me. One more thing to pay attention as well: when i change the DefaultSelected to another combo, let's say insertComboInternalProduct,  i change my variable to not reference the combo itself (e.g. for insertComboInternalProduct i use varProjeto, varPrograma and varDescInternalProduct, same goes for the others);

The example below is from my insertComboPrograma control: 

If(

    IsBlank(varProjeto || varInternalProduct || varDescricaoInternalProduct),

        [],

        [getProgramaValue]          

)

Note: I know that, in order to not repeat the code i should create a collection with the necessary data, if that is the case i will do it, but i wanna try this way first. 

Seconde note: with my OnChange features, i was able to autofill the combobox, however, even if a set a default value for my variables, it still keeps the last selection, even if a set a Blank() value in my reset form toggle, it also keeps filtering on it's own, but i'm sure that this happens because of the LookUp. 

My toggle has the same values for OnCheck and OnUncheck:

UpdateContext({getProgramaValue: Blank()});

UpdateContext({getProjetoValue: Blank()});

UpdateContext({getInternalProductValue: Blank()});

UpdateContext({getDescricaoInternalProductValue: Blank()});

In here, I also had the Reset() function to reset my combos to their default value, but it still wasn't working, bc it kept filtering on it's own, i have no idea how and why. 

If you need more information on my case or if something got a weird explanation, just tell me what it is, cause i'm about to go crazy with this one. 

FYI: i've done a lot of research here at the forum, but couldn't find any case similar to mine, if someone has a link that might refer to something similar, please let me know. 

[camarant]

hi guys, any help would be much appreciated 😄

[Dorinda]

I have this exact same issue, I would apprciate some help with this as well

[camarant]

hi dorinda, i actually managed to find a "kinda simple" solution, here it goes:

1 - i've created the following script and placed it on my "OnStart" property of the app, one for each combo as the original image shows, since my data for these columns the user can't update or delete inside the app it wont make any differece, but if yours does, try to use it within the "OnVisible" of your screen and the refresh the collection when a button is pressed or some data is inserted, depends on each case.

ClearCollect(colDefaultItem1Ativos, SortByColumns(Distinct(Filter(yourTable, Ativo = 1, item1), item1), "Value",SortOrder.Ascending));

ClearCollect(colDefaultItem2Ativos, SortByColumns(Distinct(Filter(yourTable, Ativo = 1, item2), item2), "Value",SortOrder.Ascending));

ClearCollect(colDefaultItem3Ativos, SortByColumns(Distinct(Filter(yourTable, Ativo = 1, item3), item3), "Value" ,SortOrder.Ascending));

ClearCollect(colDefaultItem4Ativos, SortByColumns(Distinct(Filter(yourTable, Ativo = 1, item4), item4),"Value",SortOrder.Ascending));

2 - Now for the comboboxes:

2.1 - For the first combobox:

• on property "OnChange" i've placed the following Here i've created a variable to store the option selectected by the user

OnChange: UpdateContext({varPrograma: insertComboPrograma.Selected.Value});

And with that variable, i'll fetch only the remaining items that has item1 as well, sort of a select item1, item2, item3, item 4 from table where item1 = microsoft. With that a collection named dataBasedOnFilter is created

OnChange: If(IsEmpty(dataBasedOnFilter),

ClearCollect(

dataBasedOnFilter,

Filter(yourTable,

item1 = varItem1 &&

Ativo = 1,

item1 ,item1 , item3, item4

)

)

);

then, using the collection created on the above step, i've placed the following code on "Items" property, which basically verifies if theres any value inside my collection, created from the OnChange, if no, it shows the collection created on "OnStart", if yes, it simply fetch the values using distinct, to exclude any values repetition

Items: If( IsEmpty(dataBasedOnFilter),

colDefaultItem1Ativos,

Distinct(dataBasedOnFilter, item1)

)

2.2 - Follow the exact same logic for the remaining combos, create a variable using update context, compare the value selected within that variable and fetch all columns that you need, because if you don't you'll be stuck on a loop, that happened to me hahahaha. One thing that this approach also helps, is if there's one value for each selection, the app will fill it by itself without user interacting much. 

Hope this helps, any questions, just let me know and i'll try to help 

[Dorinda]

Thank you for the code, I think my issue is a bit more complex because I have a large dataset in SharePoint which I cannot use because of delegation issues.  I am trying to have each of my 7 independant comboboxes filter off each other and also filter the gallery.  Nothing I have tried has worked I an so stuck on this issue.  I tried the collection but it was not filtering correctly.  Thank you anyway.