How can I filter consul nodes using multiple tags in consul-template?

I have a number of consul nodes that look something similar to:

 [
    {
        "Address": "127.0.0.1",
        "Node": "foo",
        "ServiceAddress": "",
        "ServiceName": "api",
        "ServicePort": 8100,
        "ServiceTags": [
            "production",
            "blocking"
        ]
    },
    {
        "Address": "127.0.0.1",
        "Node": "foo",
        "ServiceAddress": "",
        "ServiceName": "api",
        "ServicePort": 8101,
        "ServiceTags": [
            "production",
            "nonblocking"
        ]
    }
]

Filtering by one tag is easy:

{{range service "production.api"}}
{{.Address}}
{{end}}

but how can I filter services within my consul-template by two tags at once?

Solution

As of consul-template v0.11.1 you can use the contains operator to do:

{{range service "production.api"}}
{{if .Tags | contains "nonblocking"}}
{{.Address}}
{{end}}
{{end}}

If you are using an older version you can take advantage of Go:

{{range service "api"}}
{{if and (.Tags.Contains "nonblocking") (.Tags.Contains "production")}}
{{end}}
{{end}}