Checking for duplicates in an array or list

Hi, first thing you need to use touniformstring () as Danny said ,to make sure you are working on same type of data. Apart from this why are you indexing fv!index from fv!items? I think you need to correct this too.

Hi Gopal,

I am trying the check for duplicates. 

Should I use the column name directly instead of fv!index?

Thanks

If you are storing supplier name in fv!item.description then you should use this field only to check whether value provided by user exists in local! suppliers or not.i assume you have list of suppliers in local!suppliers then your expression should be like below,

WhereContains(touniformstring (local! suppliers),fv!item.description)

also it would be "local!suppliers.description", since local!suppliers is apparently a dictionary containing a "description" field that's the target of the text field in question.

Hi Mike,

I tried that too. 

I am getting this error: 

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!forEach [line 39]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function 'wherecontains' parameter 1 [line 51]: Invalid index: Cannot index property 'description' of type Text into type List of Variant

 validations: {
                  if(
                    count(
                      wherecontains(
                        touniform(local!suppliers.description),
                        fv!item.description
                      )
                    ) > 1,
                    "Supplier already exists",
                    {}
                  )
                },

I tried with and without nouniformstring().

I was working on it yesterday and it worked. Don't what I changed to get the error today.

Thanks

There is typo in your code. "touniform"

If the dictionary is empty then the ".description" property might not evaluate correctly before an initial entry is added.

Also the function is "touniformstring()", not "touniform()" like you have in your code currently.

Additionally, whereContains() requires the unique item (and/or item(s)) you're trying to find the positions of in the longer/original array, to be listed first in the function, not second.

And if your local!suppliers is a generic dictionary, the .description property will probably need to be typecast because whereContains() is picky about types.

Thus, it would be properly written like this:

wherecontains(
  tostring(fv!item.description),
  touniformstring(local!suppliers.description)
)

I whipped up my own version of this real quick and it appears to be working fine.

a!localVariables(
  
  local!suppliers: {},
  
  a!gridLayout(
    headerCells: {
      a!gridLayoutHeaderCell(label: "Description")
    },
    
    rows: a!forEach(
      local!suppliers,
      a!gridRowLayout(
        contents: {
          a!textField(
            value: fv!item.description,
            saveInto: fv!item.description,
            validations: if(
              count(
                wherecontains(
                  tostring(fv!item.description),
                  touniformstring(local!suppliers.description)
                )
              ) > 1,
              "Supplier already exists",
              ""
            )
          )
        }
      )
    ),
    
    addRowLink: a!dynamicLink(
      label: "Add",
      saveInto: a!save(
        local!suppliers,
        append(
          local!suppliers,
          {
            id: 1,
            description: ""
          }
        )
      )
    )
  )
)

Hi Mike,

That's great!

But sadly, isn't working for me still. 

a!localVariables(
  local!QRSuppliers: a!queryEntity(
    entity: cons!BC_SUPPLIER_DSE,
    query: a!query(
      selection: a!querySelection(
        columns: {
          a!queryColumn(field: "supplierId"),
          a!queryColumn(field: "description"),
          a!queryColumn(field: "displayOrder"),
          a!queryColumn(field: "isActive"),
          a!queryColumn(field: "createdDate"),
          a!queryColumn(field: "createdBy"),
          a!queryColumn(field: "modifiedDate"),
          a!queryColumn(field: "modifiedBy"),
          
        }
      ),
      pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
    ),
    fetchTotalCount: true
  ).data,
  local!deletedSuppliers,
  local!addedSuppliers,
  local!suppliers: local!QRSuppliers,
  a!formLayout(
    label: "Manage Supplier",
    contents: {
      a!gridLayout(
        headerCells: {
          a!gridLayoutHeaderCell(label: "Supplier Name"),
          a!gridLayoutHeaderCell(label: "Active"),
          a!gridLayoutHeaderCell(label: "")
        },
        columnConfigs: {
          a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 3),
          a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 3),
          a!gridLayoutColumnConfig(width: "ICON")
        },
        rows: a!forEach(
          items: local!suppliers,
          expression: a!gridRowLayout(
            contents: {
              a!textField(
                label: "Supplier Name",
                value: fv!item.description,
                saveInto: fv!item.description,
                validations: if(
                  count(
                    wherecontains(
                      tostring(fv!item.description),
                      touniformstring(local!suppliers.description)
                    )
                  ) > 1,
                  "Supplier already exists",
                  ""
                ),
                required: true

Where am I making the mistake?

Thanks

It's hard to tell without knowing what the value of local!suppliers is, which apparently depends on the result of your initial query.  It looks, though, as if the data rows you're getting back don't contain a ".description" property.  The error message we're seeing here is the standard error message received when you try to take a dot property from a dictionary/CDT for a property it doesn't have.

To circumvent this, we can try to get the dot property safely by using the property() function, i.e.

touniformstring(property(local!suppliers, "description", {}))

At last, It worked. 

Thank you so much Mike and others for help. 

Have a good day

At last, It worked. 

Thank you so much Mike and others for help. 

Have a good day