ent/entc/gen/template/dialect/gremlin/select.tmpl

{{/*
Copyright 2019-present Facebook Inc. All rights reserved.
This source code is licensed under the Apache 2.0 license found
in the LICENSE file in the root directory of this source tree.
*/}}

{{/* gotype: entgo.io/ent/entc/gen.typeScope */}}

{{ define "dialect/gremlin/select" }}
{{ $builder := pascal $.Scope.Builder }}
{{ $receiver := $.Scope.Receiver }}

func ({{ $receiver }} *{{ $builder }}) gremlinScan(ctx context.Context, root *{{ $.QueryName }}, v any) error {
	var (
		res = &gremlin.Response{}
		traversal = root.gremlinQuery(ctx)
	)
	if fields := {{ $receiver }}.ctx.Fields; len(fields) == 1 {
		if fields[0] != {{ $.Package }}.FieldID {
			traversal = traversal.Values(fields...)
		} else {
			traversal = traversal.ID()
		}
	} else {
		fields := make([]any, len({{ $receiver }}.ctx.Fields))
		for i, f := range {{ $receiver }}.ctx.Fields {
			fields[i] = f
		}
		traversal = traversal.ValueMap(fields...)
	}
	query, bindings := traversal.Query()
	if err := {{ $receiver }}.driver.Exec(ctx, query, bindings, res); err != nil {
		return err
	}
	if len(root.ctx.Fields) == 1 {
		return res.ReadVal(v)
	}
	vm, err := res.ReadValueMap()
	if err != nil {
		return err
	}
	return vm.Decode(v)
}
{{ end }}