String does not match regex

Input

value

Validate that value does not match pattern '^[0-9]+$'

validation:

stringDoesNotMatchRegex

Ensure string field does not match regex pattern

source:value

parameters

pattern

Regex pattern that the field must not match

Output

result
Pass
Pass
Pass
String field "value" matches unwanted regex pattern "^[0-9]+$"
String field "value" matches unwanted regex pattern "^[0-9]+$"
String field "value" matches unwanted regex pattern "^[0-9]+$"

* Sample inputs run locally in your browser using the same operation logic as Fontana Flow.
Results are illustrative, not connected to a workflow.

Ensure string field does not match regex pattern.

Parameters

• pattern (Regex Pattern, string, required) — Regex pattern that the field must not match. Examples: "^test", ".*admin.*", "^\\d+$".

Field selection

• source — Field whose values this operation reads. Use a single field name, a comma-separated list of plain field paths (cash_flow_type, currency) from the multi-select UI, or a regex via Pattern mode. Omit to apply to all fields on the row.
• target — Optional output field. When omitted, the source field is updated in place. Hidden when more than one named source field is selected.

JSON Configuration

{
  "id": "op-stringDoesNotMatchRegex",
  "type": "validation",
  "action": "stringDoesNotMatchRegex",
  "params": {
    "pattern": "^[0-9]+$"
  },
  "testInputs": [
    "letters",
    "abc",
    "text only",
    "12345",
    "999",
    "007"
  ]
}

Related

• required