AND operator in range statement's where clause

support
1

Hi,

I would like to express the following, but I cannot figure out how the AND operator should be used:

{{ range first 5 (where .Site.Pages ".Params.author" "!=" nil AND ".Params.author" "in" "some text") }}
  {{ .Title }}
{{ end }}

Above, .Params.author is an array of strings. I have already checked the conditionals section here but I always get a syntax error. I have tried the following with no luck:

{{ range first 5 (where .Site.Pages (and (".Params.author" "!=" nil) (".Params.author" "in" "some text"))) }}
  {{ .Title }}
{{ end }}

This one also fails:

{{ range first 5 (where (and (.Site.Pages ".Params.author" "!=" nil) (.Site.Pages ".Params.author" "in" "some text"))) }}
  {{ .Title }}
{{ end }}

What would be the correct syntax?