Problem filtering null values from record

Rather than indexing, can you try applying the query filters using "not null" operator? This should ideally retrieve records that do not have null values.

the problem is that this is added data not in the record that i want to save after editing it

Here's an example with a map but the same logic applies.

a!localVariables(
  local!values: {
    a!map(id: 1, value: "1"),
    a!map(id: 2, value: "2"),
    a!map(id: 3, value: null)
  },
  reject(
    a!isNullOrEmpty,
    a!forEach(
      items: local!values,
      expression: if(
        a!isNotNullOrEmpty(fv!item.value),
        fv!item,
        null
      )
    )
  )
)

Another option that avoids that clunky (IMHO) way of trying to use foreach to filter a list.

a!localVariables(
  local!values: {
    a!map(id: 1, value: "1"),
    a!map(id: 2, value: "2"),
    a!map(id: 3, value: null)
  },
  index(
    local!values,
    where(
      a!forEach(
        items: local!values.value,
        expression: a!isNotNullOrEmpty(fv!item)
      )
    )
  )
)

Thank you