如何在Firestore中使用对象将数据设置为数组 [英] How to set data to a Array with objects in Firestore
本文介绍了如何在Firestore中使用对象将数据设置为数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想要做的是将所有数据设置为Firestore中的数组，如下所示：
Firestore
What I want to do is to set all data to my array in Firestore, it would look something like this: Firestore
但是我所做的事情给了我这个错误：
But what I have done gives me this error:
*** Terminating app due to uncaught exception 'FIRInvalidArgumentException', reason: 'Unsupported type: _SwiftValue'
*** First throw call stack:
(
0 CoreFoundation 0x000000010b8d71e6 __exceptionPreprocess + 294
1 libobjc.A.dylib 0x000000010af6c031 objc_exception_throw + 48
2 test collectionview 0x00000001092e7dda -[FSTUserDataConverter parseScalarValue:context:] + 2169
3 test collectionview 0x00000001092e729c -[FSTUserDataConverter parseData:context:] + 792
4 test collectionview 0x00000001092e735b __42-[FSTUserDataConverter parseData:context:]_block_invoke + 94
5 CoreFoundation 0x000000010b87ac50 __NSArrayEnumerate + 592
6 test collectionview 0x00000001092e7122 -[FSTUserDataConverter parseData:context:] + 414
7 test collectionview 0x00000001092e65e3 __46-[FSTUserDataConverter parsedSetData:options:]_block_invoke + 346
8 libswiftCore.dylib 0x000000010e8a0af1 _T0s26_SwiftDeferredNSDictionaryC23enumerateKeysAndObjectsySi7options_ys9UnmanagedVyyXlG_AGSpys5UInt8VGtXB5usingtFTf4dgn_n + 289
9 libswiftCore.dylib 0x000000010e703b11 _T0s26_SwiftDeferredNSDictionaryC23enumerateKeysAndObjectsySi7options_ys9UnmanagedVyyXlG_AGSpys5UInt8VGtXB5usingtF + 17
10 libswiftCore.dylib 0x000000010e7040cb _T0s26_SwiftDeferredNSDictionaryC23enumerateKeysAndObjectsySi7options_ys9UnmanagedVyyXlG_AGSpys5UInt8VGtXB5usingtFTo + 43
11 test collectionview 0x00000001092e6303 -[FSTUserDataConverter parsedSetData:options:] + 467
12 test collectionview 0x00000001092dc0aa -[FIRDocumentReference setData:options:completion:] + 147
13 test collectionview 0x00000001092dbf1a -[FIRDocumentReference setData:] + 92
14 test collectionview 0x00000001091e8f85 _T019test_collectionview25NewExerciseViewControllerC08doneWithD6ActionySo15UIBarButtonItemCF + 7845
15 test collectionview 0x00000001091e91cc _T019test_collectionview25NewExerciseViewControllerC08doneWithD6ActionySo15UIBarButtonItemCFTo + 60
16 UIKit 0x000000010c46a3e8 -[UIApplication sendAction:to:from:forEvent:] + 83
17 UIKit 0x000000010ce6f209 __45-[_UIButtonBarTargetAction _invoke:forEvent:]_block_invoke + 154
18 UIKit 0x000000010ce6f142 -[_UIButtonBarTargetAction _invoke:forEvent:] + 154
19 UIKit 0x000000010c46a3e8 -[UIApplication sendAction:to:from:forEvent:] + 83
20 UIKit 0x000000010c5e57a4 -[UIControl sendAction:to:forEvent:] + 67
21 UIKit 0x000000010c5e5ac1 -[UIControl _sendActionsForEvents:withEvent:] + 450
22 UIKit 0x000000010c5e4a09 -[UIControl touchesEnded:withEvent:] + 580
23 UIKit 0x000000010c4df0bf -[UIWindow _sendTouchesForEvent:] + 2729
24 UIKit 0x000000010c4e07c1 -[UIWindow sendEvent:] + 4086
25 UIKit 0x000000010c484310 -[UIApplication sendEvent:] + 352
26 UIKit 0x000000010cdc56af __dispatchPreprocessedEventFromEventQueue + 2796
27 UIKit 0x000000010cdc82c4 __handleEventQueueInternal + 5949
28 CoreFoundation 0x000000010b879bb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
29 CoreFoundation 0x000000010b85e4af __CFRunLoopDoSources0 + 271
30 CoreFoundation 0x000000010b85da6f __CFRunLoopRun + 1263
31 CoreFoundation 0x000000010b85d30b CFRunLoopRunSpecific + 635
32 GraphicsServices 0x000000011147aa73 GSEventRunModal + 62
33 UIKit 0x000000010c469057 UIApplicationMain + 159
34 test collectionview 0x00000001091f19a7 main + 55
35 libdyld.dylib 0x000000010f1c6955 start + 1
36 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
我已经为自己的运动模型做了建模。像这样：
I have made a model for my "exercise" like this:
import Foundation
import Firestore
protocol DocumentSerializable {
init?(dictionary:[String:Any])
}
struct Exercise {
var title: String
var language: String
var translated: String
var uid: String
var userId: String
var dueDate: Int
var lastOpen: Int
var words: Array<Any>
var dictionary:[String:Any] {
return [
"title":title,
"language":language,
"translated":translated,
"uid":uid,
"userId":userId,
"dueDate":dueDate,
"lastOpen":lastOpen,
"words":words
]
}
}
extension Exercise : DocumentSerializable {
init?(dictionary: [String : Any]) {
guard let title = dictionary["title"] as? String,
let language = dictionary["language"] as? String,
let translated = dictionary["translated"] as? String,
let uid = dictionary["uid"] as? String,
let userId = dictionary["userId"] as? String,
let dueDate = dictionary["dueDate"] as? Int,
let lastOpen = dictionary["lastOpen"] as? Int,
let words = dictionary["words"] as? Array<Any>
else {return nil}
self.init(title: title, language: language, translated: translated, uid: uid, userId: userId, dueDate: dueDate, lastOpen: lastOpen, words: words)
}
}
以及类似单词的模型：
import Foundation
import Firestore
protocol DocumentSerializable2 {
init?(dictionary:[String:Any])
}
struct Word {
var translation: String
var word: String
var dictionary:[String:Any] {
return [
"translation":translation,
"word":word
]
}
}
extension Word : DocumentSerializable {
init?(dictionary: [String : Any]) {
guard let translation = dictionary["translation"] as? String,
let word = dictionary["word"] as? String
else {return nil}
self.init(translation: translation, word: word)
}
}
我已经尝试使用此代码来设置数据，并且它对所有数据都可以正常工作，除了单词part：
I have tried this code to set the data and it does work fine for all the data except for the words part:
let newExercise = Exercise(title: exerciseTitleTxt.text!, language: language1Txt.title(for: .normal)!, translated: language2Txt.title(for: .normal)!, uid: "test", userId: uid!, dueDate: dueDateMiliseconds, lastOpen: Date().millisecondsSince1970, words: wordsArray)
db.collection("exercises").document("test2").setData(newExercise.dictionary)
要将单词放入 wordsArray中，我是不是在这样做：
To get the words into the "wordsArray" am I doing like this:
let word = Word(translation: translationTxt.text!, word: wordTxt.text!)
wordsArray.append(word)
所以我自己的猜测是，我需要更改在练习中保存单词的方式模型，但我无法确定如何做到这一点。
So my own guess is that I need to change the way I am saving the words in the Exercise model but I can not wrap my head around how exactly I would do that.
感谢您的提前帮助！
推荐答案
这是因为您的 words 参数是Word对象的数组- Array< Word> 或 [Word] 。 Firebase不知道如何序列化它。您需要做的就是将单词数组转换为词典数组。
This is because your words parameter is an array of Word objects - Array<Word> or [Word]. Firebase doesn't know how to serialise it. What you need to do is convert your array of Words to an array of dictionaries.
var dictionary:[String:Any] {
return [
...
"words" : words.map({$0.dictionary})
]
}
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