mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-10 22:45:59 +05:45
wu-hui
9b0d5a3b1a
* Commit with failed optional test case. * Integration Test and cleanup * swiftformat * better doc formatting * addressing comments * rename to SelfDocumentID * Addressing Comments * fix comment
42 lines
1.4 KiB
Swift
42 lines
1.4 KiB
Swift
/*
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* Copyright 2019 Google
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import Foundation
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import FirebaseFirestore
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extension DocumentSnapshot {
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/// Retrieves all fields in a document and converts them to an instance of
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/// caller-specified type. Returns `nil` if the document does not exist.
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///
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/// See `Firestore.Decoder` for more details about the decoding process.
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///
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/// - Parameters
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/// - type: The type to convert the document fields to.
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/// - decoder: The decoder to use to convert the document. `nil` to use
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/// default decoder.
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public func data<T: Decodable>(as type: T.Type,
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decoder: Firestore.Decoder? = nil) throws -> T? {
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var d = decoder
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if d == nil {
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d = Firestore.Decoder()
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}
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if let data = data() {
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return try d?.decode(T.self, from: data, in: reference)
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}
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return nil
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}
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}
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