42 lines
907 B
Plaintext
42 lines
907 B
Plaintext
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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* @format
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*/
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// flowlint ambiguous-object-type:error
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'use strict';
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const invariant = require('invariant');
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const {DEFAULT_HANDLE_KEY} = require('./RelayDefaultHandleKey');
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/**
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* @internal
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*
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* Helper to create a unique name for a handle field based on the handle name, handle key and
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* source field.
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*/
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function getRelayHandleKey(
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handleName: string,
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key: ?string,
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fieldName: ?string,
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): string {
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if (key && key !== DEFAULT_HANDLE_KEY) {
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return `__${key}_${handleName}`;
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}
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invariant(
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fieldName != null,
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'getRelayHandleKey: Expected either `fieldName` or `key` in `handle` to be provided',
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);
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return `__${fieldName}_${handleName}`;
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}
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module.exports = getRelayHandleKey;
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