gohugoio/hugo · error

must not provide more arguments than Resource and hash…

Error message

must not provide more arguments than Resource and hash algorithm

What it means

Thrown by resources.Fingerprint when more than two arguments are supplied. The function accepts at most a hash algorithm and a Resource (in that order), so three or more arguments is a usage error.

Solutions

1. Limit to at most two arguments: either {{ resources.Fingerprint $r }} or {{ resources.Fingerprint "sha512" $r }}.
2. Remember the algorithm, if given, must be the FIRST argument.
3. Fingerprint resources individually, not as a batch.

Example fix

// before
{{ resources.Fingerprint $r "sha512" $opts }}
// after
{{ resources.Fingerprint "sha512" $r }}

{{ resources.Fingerprint "sha512" $r }}

When it happens

Trigger: Calling {{ resources.Fingerprint $r "sha512" $extra }} or any form with three or more arguments. Also passing an options map or multiple resources.

Common situations: Misremembering the argument order and adding extras; copy-paste from another resources function that takes more args; passing a slice of resources.

Related errors

• must provide a Resource object
• must provide an URL and optionally an options map
• must provide a Resource and optionally an options map
• must provide one or more Resource objects to concat
• resources.PostProcess cannot be used in a deferred template

AI-assisted analysis of gohugoio/hugo@52c9bd7908 (2026-08-09). Data as JSON: /api/errors/490244e80710e3e0. Report an issue: GitHub.

Appendix: source

Thrown at tpl/resources/resources.go:270

	data := args[1]

	r, ok := args[2].(resources.ResourceTransformer)
	if !ok {
		return nil, fmt.Errorf("type %T not supported in Resource transformations", args[2])
	}

	return ns.templatesClient.ExecuteAsTemplate(ctx, r, targetPath, data)
}

// Fingerprint transforms the given Resource with a MD5 hash of the content in
// the RelPermalink and Permalink.
func (ns *Namespace) Fingerprint(args ...any) (resource.Resource, error) {
	if len(args) < 1 {
		return nil, errors.New("must provide a Resource object")
	}

	if len(args) > 2 {
		return nil, errors.New("must not provide more arguments than Resource and hash algorithm")
	}

	var algo string
	resIdx := 0

	if len(args) == 2 {
		resIdx = 1
		var err error
		algo, err = cast.ToStringE(args[0])
		if err != nil {
			return nil, err
		}
	}

	r, ok := args[resIdx].(resources.ResourceTransformer)
	if !ok {
		return nil, fmt.Errorf("%T can not be transformed", args[resIdx])
	}

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