Get an element of a struct array by attribute value in a Golang template-CodePudding

I want to display the value of a certain WooCommerce product custom attribute in a Golang template.

type Produkt struct {
   ...
   Attributes []struct {
        ID        int      `json:"id"`
        Name      string   `json:"name"`
        Position  int      `json:"position"`
        Visible   bool     `json:"visible"`
        Variation bool     `json:"variation"`
        Options   []string `json:"options"`
   }
   ...
}

An actual json object looks like this:

{
   ...
   "attributes": [
   {},
   {
      "id": 2,
      "name": "Hersteller",
      "position": 5,
      "visible": true,
      "variation": false,
      "options": [
        "Lana Grossa"
      ]
    },
   {}
   ],
   ... 
}

So from this example I want to find the first element of the 'Options' array (Lana Grossa) of the element with the name = "Hersteller" of the attributes array.

I tried to adapt the syntax to get an element by index, but could not get it to work...

<input type="text" value="{{ (index (value .Produkt.Attributes.Name eq "Hersteller").Options 0) }}"/>
<input type="text" value="{{ (index (Name .Produkt.Attributes eq "Hersteller").Options 0) }}"/>
<input type="text" value="{{ (index (.Produkt.Attributes.Name["Hersteller"]).Options 0) }}"/>

Any hint is greatly appreciated

CodePudding user response：

There is no simple way to do this with templates. You have to first find the entry you need, and then look at its contents

{{$name := "" }}
{{ range .Product.Attributes }}
{{if eq .Name "Hersteller"}}
   {{$name = (index .Options 0)}}
{{end}}
{{ end }}
<input type="text" value="{{$name}}"/>