README.md

V011

The V011 analyzer reports when custom SchemaValidateFunc declarations can be replaced with validation.StringLenBetween().

Flagged Code

func validateExampleThing(v interface{}, k string) (ws []string, errors []error) {
  value := v.(string)

  if len(value) < 1 || len(value) > 255 {
    errors = append(errors, fmt.Errorf("%q must be between 1 and 255 characters: %q", k, value))
  }

  return
}

Passing Code

// directly in Schema
ValidateFunc: validation.StringLenBetween(1, 255),

// or saving as a variable
var validateExampleThing = validation.StringLenBetween(1, 255)

// or replacing the function
func validateExampleThing() schema.SchemaValidateFunc {
  return validation.StringLenBetween(1, 255)
}

Ignoring Reports

Singular reports can be ignored by adding the a //lintignore:V011 Go code comment at the end of the offending line or on the line immediately proceding, e.g.

//lintignore:V011
func validateExampleThing(v interface{}, k string) (ws []string, errors []error) {
  value := v.(string)

  if len(value) < 1 || len(value) > 255 {
    errors = append(errors, fmt.Errorf("%q must be between 1 and 255 characters: %q", k, value))
  }

  return
}