Integer

Use integer validation for numeric fields that must contain whole numbers (Int, Int64, UInt, etc.).

Type Defaults

By default it uses Int.
Use integer(Int64.self) (or another integer type) when you need explicit type control.

gt

Strictly greater than the specified number.

Parameters

• num: T - exclusive lower bound
• message: ((T) -> LocalizedStringResource)? - optional custom error message builder

let greaterThan = FormCraftValidationRules()
  .integer()
  .gt(num: 10)

greaterThan.validate(value: 15) // ✅ is valid
greaterThan.validate(value: 5)  // ❌ is not valid

gte

Greater than or equal to the specified number.

Parameters

• num: T - inclusive lower bound
• message: ((T) -> LocalizedStringResource)? - optional custom error message builder

let greaterOrEqual = FormCraftValidationRules()
  .integer()
  .gte(num: 10)

greaterOrEqual.validate(value: 10) // ✅ is valid
greaterOrEqual.validate(value: 5)  // ❌ is not valid

lt

Strictly less than the specified number.

Parameters

• num: T - exclusive upper bound
• message: ((T) -> LocalizedStringResource)? - optional custom error message builder

let lessThan = FormCraftValidationRules()
  .integer()
  .lt(num: 100)

lessThan.validate(value: 50)   // ✅ is valid
lessThan.validate(value: 150)  // ❌ is not valid

lte

Less than or equal to the specified number.

Parameters

• num: T - inclusive upper bound
• message: ((T) -> LocalizedStringResource)? - optional custom error message builder

let lessOrEqual = FormCraftValidationRules()
  .integer()
  .lte(num: 100)

lessOrEqual.validate(value: 100) // ✅ is valid
lessOrEqual.validate(value: 101) // ❌ is not valid

positive

Positive number (greater than zero).

Parameters

• message: LocalizedStringResource? - error message if the value is not positive

let positive = FormCraftValidationRules()
  .integer()
  .positive()

positive.validate(value: 42)   // ✅ is valid
positive.validate(value: -10)  // ❌ is not valid

nonNegative

Zero or positive.

Parameters

• message: LocalizedStringResource? - error message if the value is negative

let nonNegative = FormCraftValidationRules()
  .integer()
  .nonNegative()

nonNegative.validate(value: 0)   // ✅ is valid
nonNegative.validate(value: -1)  // ❌ is not valid

negative

Negative number (less than zero).

Parameters

• message: LocalizedStringResource? - error message if the value is not negative

let negative = FormCraftValidationRules()
  .integer()
  .negative()

negative.validate(value: -5) // ✅ is valid
negative.validate(value: 5)  // ❌ is not valid

nonPositive

Zero or negative.

Parameters

• message: LocalizedStringResource? - error message if the value is positive

let nonPositive = FormCraftValidationRules()
  .integer()
  .nonPositive()

nonPositive.validate(value: 0)  // ✅ is valid
nonPositive.validate(value: 10) // ❌ is not valid

multipleOf

Checks that the value is divisible by the specified number.

Parameters

• num: T - divisor. If zero, validation fails
• message: ((T) -> LocalizedStringResource)? - optional custom error message builder

let multipleOf = FormCraftValidationRules()
  .integer()
  .multipleOf(num: 5)

multipleOf.validate(value: 20) // ✅ is valid
multipleOf.validate(value: 7)  // ❌ is not valid