Method Resolve

tools/search/simple_field_resolver.go:88–124

Resolve implements `search.Resolve` interface. Returns error if `field` is not in `r.allowedFields`.

(field string)

//
// Returns error if `field` is not in `r.allowedFields`.
func (r *SimpleFieldResolver) Resolve(field string) (*ResolverResult, error) {
	if !list.ExistInSliceWithRegex(field, r.allowedFields) {
		return nil, fmt.Errorf("failed to resolve field %q", field)
	}

	parts := strings.Split(field, ".")

	// single regular field
	if len(parts) == 1 {
		return &ResolverResult{
			Identifier: "[[" + inflector.Columnify(parts[0]) + "]]",
		}, nil
	}

	// treat as json path
	var jsonPath strings.Builder
	jsonPath.WriteString("$")
	for _, part := range parts[1:] {
		if _, err := strconv.Atoi(part); err == nil {
			jsonPath.WriteString("[")
			jsonPath.WriteString(inflector.Columnify(part))
			jsonPath.WriteString("]")
		} else {
			jsonPath.WriteString(".")
			jsonPath.WriteString(inflector.Columnify(part))
		}
	}

	return &ResolverResult{
		NullFallback: NullFallbackDisabled,
		Identifier: fmt.Sprintf(
			"JSON_EXTRACT([[%s]], '%s')",
			inflector.Columnify(parts[0]),
			jsonPath.String(),
		),
	}, nil
}