golang ent template: Create Node By Required field method

node.tmpl.go

{{define "node"}}

// ...

{{range $node := $.Nodes}}    
    {{$requiredFieldIndices := xrange 0}}
    {{range $index, $field := $node.Fields}}
        {{if and (not $field.Optional) (not $field.Default) (not $field.Immutable) -}}
            {{$requiredFieldIndices = append $requiredFieldIndices $index}}
        {{end}}
    {{end}}

    {{$requiredEdgeIndices := xrange 0}}
    {{range $index, $edge := $node.Edges}}
        {{if and (not $edge.Optional) -}}
            {{$requiredEdgeIndices = append $requiredEdgeIndices $index}}
        {{end}}
    {{end}}

    func ({{$r}} {{$createTypePtr}}) SetRequiredFields(
        {{range $index := $requiredFieldIndices -}}
            {{$field := index $node.Fields $index -}}
            {{if $field.Unique}}{{camel (printf "%s%s" "unique_" $field.BuilderField)}}{{else}}{{camel $field.BuilderField}}{{end}} {{$field.Type}},
        {{end -}}
        {{- range $index := $requiredEdgeIndices -}}
            {{- $e := index $node.Edges $index -}}
            {{$idsParams := print (singular $e.BuilderField | camel) "IDs"}}{{if $e.Unique}}{{$idsParams = print (camel $e.BuilderField) "ID"}}{{end}}
            {{$idsParams}} {{if not $e.Unique}}[]{{end}}{{$e.Type.ID.Type}},
        {{- end}}
    ) {{$createTypePtr}} {
        {{- range $index := $requiredFieldIndices}}
            {{$field := index $node.Fields $index -}}
            {{$r}}.Set{{$field.StructField}}(
                {{- if $field.Unique}}{{camel (printf "%s%s" "unique_" $field.BuilderField)}}{{else}}{{camel $field.BuilderField}}{{end -}}
            )
        {{- end -}}
        {{- range $index := $requiredEdgeIndices -}}
            {{- $e := index $node.Edges $index -}}
            {{$op := "add"}}{{if $e.Unique}}{{$op = "set"}}{{end}}
            {{$idsFunc := print (pascal $op) (singular $e.Name | pascal) "IDs"}}{{if $e.Unique}}{{$idsFunc = print (pascal $op) (pascal $e.Name) "ID"}}{{end}}
            {{- $idsParams := print (singular $e.BuilderField | camel) "IDs"}}{{if $e.Unique}}{{$idsParams = print (camel $e.BuilderField) "ID"}}{{end -}}
            {{- $r}}.{{$idsFunc}}({{$idsParams}}{{if not $e.Unique}}...{{end}})
        {{- end}}

        return {{$r}}
    }
    
    // ...
{{end}}

// ...

{{end}}