Need to explicitly call PrecomputeMessages() when using custom RequestBody

[guneyizol]

huma/validate.go

Line 543 in 6019e80

for _, k := range s.propertyNames {

When using a custom RequestBody in a huma.Operation given to the huma.Register function, s.propertyNames field is only populated when the PrecomputeMessages() method is explicitly called on the Schema given to a MediaType.

Example:

// Schema definition
// ...

schema.PrecomputeMessages()

huma.Register(
        api,
        huma.Operation{
	        OperationID:   "post-user-attributes",
	        Method:        http.MethodPost,
	        Path:          "/",
	        Description:   "upsert the given attributes for the given user, validating using the given appKey's attributes",
	        Summary:       "upsert attributes",
	        DefaultStatus: http.StatusOK,
	        RequestBody: &huma.RequestBody{
		        Description: "My custom request schema",
		        Required:    true,
		        Content: map[string]*huma.MediaType{
			        "application/json": {
				        Schema: schema,
			        },
		        },
	        },
        },
// handler omitted

If this is a feature, I believe that it should be explicitly documented.

Thanks 🙏

[danielgtaylor]

@guneyizol nice catch, this is probably a bug. I'll try and get a fix up to ensure we always precompute at registration.