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Maximum length

Input
value
Validate that value has at most 10 characters
validation:
maxLength

Ensure string does not exceed maximum length

source:value
parameters
maxLength

Maximum length allowed

Output
result
maxLength validation failed: hello world exceeds maximum length of 10
Pass
Pass
maxLength validation failed: HELLO WORLD exceeds maximum length of 10
Pass
maxLength validation failed: invalid value exceeds maximum length of 10

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 does not exceed maximum length.

Parameters

  • maxLength (Maximum Length, number, required) — Maximum length allowed. Examples: 10, 50, 100, 255.

Field selection

  • params.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.
  • params.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-maxLength",
  "kind": "validation:maxLength",
  "params": {
    "maxLength": 10
  }
}