mirror of
https://github.com/open-policy-agent/opa.git
synced 2026-08-24 09:15:31 -06:00
Charlie Egan
301efc6997
This commit extends the go and wasm implementations of object.get to allow a key to also be an array. When passed an array, each element in the array will be used as a key in turn. This allows values at deeply nested paths to be extracted from objects. It also supports getting indexes of nested arrays. The functionality was originally inspired by Ruby's Hash.dig function: https://ruby-doc.org/core-2.3.0_preview1/Hash.html#method-i-dig however we opted to include the behavior in object.get instead after being uncertain 'dig' was a commonly understood name. Signed-off-by: Charlie Egan <charlieegan3@users.noreply.github.com>
40 lines
938 B
Go
40 lines
938 B
Go
// Copyright 2020 The OPA Authors. All rights reserved.
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// Use of this source code is governed by an Apache2
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// license that can be found in the LICENSE file.
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// Package ref implements internal helpers for references
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package ref
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import (
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"errors"
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"strings"
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"github.com/open-policy-agent/opa/ast"
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"github.com/open-policy-agent/opa/storage"
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)
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// ParseDataPath returns a ref from the slash separated path s rooted at data.
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// All path segments are treated as identifier strings.
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func ParseDataPath(s string) (ast.Ref, error) {
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s = "/" + strings.TrimPrefix(s, "/")
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path, ok := storage.ParsePath(s)
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if !ok {
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return nil, errors.New("invalid path")
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}
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return path.Ref(ast.DefaultRootDocument), nil
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}
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// ArrayPath will take an ast.Array and build an ast.Ref using the ast.Terms in the Array
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func ArrayPath(a *ast.Array) ast.Ref {
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var ref ast.Ref
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a.Foreach(func(term *ast.Term) {
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ref = append(ref, term)
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})
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return ref
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}
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