Strange range behaviour: only some commands within range being executed

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1

I am working on a page template that requires me to loop over a JSON file. For some reason, the instructions within the range are only sometimes being executed, and I can see no reason for it.

I’ve trimmed the loop down to this:

{{ warnf "No of locations: %v" ( len $.Site.Data.locations ) }}                   
{{ range $key, $value := $.Site.Data.locations }}                       
    {{ warnf "Current location: %v" $key }}                             
    {{ warnf "Second log" }}                                            
{{ end }}

And then, when I run Hugo, I get the following terminal output:

image

i.e., the loop is correctly iterating through all of the values, but the second instruction is only executing the first time.

The more complex loop I’m actually trying to do is

{{ .Scratch.Set "maxItems" 1 }}
{{ .Scratch.Set "numOfItems" 1 }}

{{ warnf "No of locations: %v" ( len $.Site.Data.locations ) }}
{{ range $key, $value := $.Site.Data.locations }}
    {{ $childPosts := where $.Site.Pages ".Params.locations" "intersect" ( slice $key ) }}
    {{ warnf "Current location: %v" $key }}
    {{ warnf "Child posts: %v" $childPosts }}
    {{ .Scratch.Set "numOfItems" ( len $childPosts ) }}
    {{ if ( gt ( .Scratch.Get "numOfItems" ) ( .Scratch.Get "maxItems" ) ) }}
        {{ warnf "Updating maxItems" }}
        {{ .Scratch.Set "maxItems" ( .Scratch.Get "numOfItems" ) }}
        {{ warnf "New maxItems: %d" .Scratch.Get "maxItems" }}
    {{ end }}
{{ end }}
{{ warnf "maxItems: %v" ( .Scratch.Get "maxItems" ) }}

which produces the following terminal output:

image
image579×567 129 KB

Again, it isn’t running all of the commands on every iteration, but no issues are raised.

I’m using hugo v0.111.3-5d4eb5154e1fed125ca8e9b5a0315c4180dab192+extended linux/amd64

In that second console screenshot you can see some other warnings peppered throughout from other templates. Does this suggest that the problem is some sort of multi-thread/concurrency issue?

2

errorf or warnf will evaluate a format string, then output the result to the ERROR or WARNING log (and only once per error message to avoid flooding the log). - errorf and warnf | Hugo

You could output more meaningful message with args, something like this.

{{ warnf "Second log: %s" $key }}
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