Date Range validation

RE: Date Range validation

Stefan Helzle — Wed, 26 Apr 2023 15:04:28 GMT

This is a code snippet that checks one range against other ranges and returns true if there is an overlap.

a!localVariables(
  local!ranges: {
    a!map(start: date(2023, 1, 10), end: date(2023, 1, 20)),
    a!map(start: date(2023, 2, 12), end: date(2023, 3, 1)),
  },
  local!new: a!map(start: date(2023, 1, 15), end: date(2023, 2, 1)),
  a!forEach(
    items: local!ranges,
    expression: and(
      local!new.start <= fv!item.end,
      local!new.end >= fv!item.start
    )
  )
)

RE: Date Range validation

Druva — Wed, 26 Apr 2023 13:48:29 GMT

Hi Stefan,

In simple terms employee is applying for leave and if user want to apply for new leave or edit applied leave there should not be overlapping between existing leaves applied.

I just have UI with start date and end date, once user submits the form data is stored in database. while changing the dates in the ui again there should not be overlap.

RE: Date Range validation

Stefan Helzle — Wed, 26 Apr 2023 13:42:54 GMT

Operators in Appian can easily compare a value against a list of values. Depending on your exact requirement, this should be pretty simple.

a!localVariables(
  local!ranges: {
    a!map(start: date(2023, 1, 1), end: date(2023, 2, 1)),
    a!map(start: date(2023, 2, 1), end: date(2023, 3, 1)),
  },
  local!date: date(2023, 1, 15),
  {
    local!date >= local!ranges.start,
    local!date <= local!ranges.end
  }
)

RE: Date Range validation

Stefan Helzle — Wed, 26 Apr 2023 13:37:38 GMT

Ready to help. Can you share your existing code?