Validation Rules

Be aware that all standard rules just skip checking empty values.
So, empty string will pass next validation - "first_name: { min_length: [10] }". We have special rules "required" and "not_empty" to check that value is present.
This allows us to use the same rules for not required fields.

first_name: { min_length: [10] } # name is optional. We will check length only if "first_name" was passed
first_name: [ 'required', { min_length: [10] } ] # check that the name is present and validate length

Standard rules that should be supported by every implementation:

• Common Rules
  • required
  • not_empty
  • not_empty_list
  • any_object
• String Rules
  • string
  • eq
  • one_of
  • max_length
  • min_length
  • length_between
  • length_equal
  • like
• Numeric Rules
  • integer
  • positive_integer
  • decimal
  • positive_decimal
  • max_number
  • min_number
  • number_between
• Special Rules
  • email
  • url
  • iso_date
  • equal_to_field
• Metarules
  • nested_object
  • list_of
  • list_of_objects
  • list_of_different_objects
  • or
• Modifiers (previously - "Filter rules")
  • trim
  • to_lc
  • to_uc
  • remove
  • leave_only
  • default