Firestore 查询问题

Question

我在运行此函数时遇到问题：

    static func getAllJokes(reset: Bool, completion: @escaping () -> Void) {
        Utilities.getDadJokes(reset: reset) {
            print("Dad Jokes Pass, array = \(DadJokes.dadJokes)")
            Utilities.getAssistantJokes(reset: reset) {
                print("Assistant Jokes Pass, array = \(AssistantJokes.assistantJokes)")
                Utilities.getKnockKnockJokes(reset: reset) {
                    print("Knock Knock Jokes Pass, array = \(KnockKnockJokes.knockKnockJokes)")
                    Utilities.getRandomJokes(reset: reset) {
                        print("Random Jokes Pass, array = \(RandomJokes.randomJokes)")
                        completion()
                    }
                }
            }
        }
    }

getDadJokes:

            db.collection("jokes").document("Dad Jokes").addSnapshotListener { document, error in
                //check for error
                if error == nil {
                    //check if document exists
                    if document != nil && document!.exists {
                        if let JokeNum = document!.get("JokeNum") as? Int {
                            self.countDadJokes = JokeNum
                            UserDefaults.standard.setValue(JokeNum, forKey: "countDadJokes")
                            print("DadJokeNum = \(self.countDadJokes)")
                        }
//                        var DadJokes.dadJokes.count = 1
                        print("count = \(DadJokes.dadJokes.count)/\(self.countDadJokes)")
                        print("countDadJoke = \(self.countDadJokes)")
                        self.jokes.removeAll()
                        if reset == true {
                            DadJokes.dadJokes.removeAll()
                        }
//                        for _ in 0...self.countDadJokes {
                        while DadJokes.dadJokes.count <= self.countDadJokes {
//                            print("count = \(DadJokes.dadJokes.count)/\(self.countDadJokes)")
                            if let Joke = document!.get("\(DadJokes.dadJokes.count + 1)") as? String {
                                print("DadJokeNum = \(self.countDadJokes)")
                                if Utilities.jokes.contains("\(Joke) - From Dad Jokes") {}else {
                                    Utilities.jokes.append("\(Joke) - From Dad Jokes")
                                    DadJokes.dadJokes.append(Joke)
                                    UserDefaults.standard.set(DadJokes.dadJokes, forKey: defaults.dadJokes.rawValue)
                                    Utilities.updateJokesDefaults()
                                    print("countDadJokesSaved = \(DadJokes.dadJokes.count)")
                                    print("DadJokesSaved = \(DadJokes.dadJokes)")
                                }
                                print("Dad Joke: \(Joke)")
                                //print("count = \(DadJokes.dadJokes.count)/\(self.countDadJokes)")
                                if DadJokes.dadJokes.count == self.countDadJokes {
                                    completion()
                                }
                            }
                        }
                    }
                }
            }

运行良好，但是当我运行 getAssistantJoke 时（同样的事情）：

            print("assistant get running")
            db.collection("jokes").document("Assistant Jokes").addSnapshotListener { document, error in
                //check for error
                if error == nil {
                    //check if document exists
                    if document != nil && document!.exists {
                        if let JokeNum = document!.get("JokeNum") as? Int {
                            self.countAssistantJokes = JokeNum
                            UserDefaults.standard.setValue(JokeNum, forKey: defaults.countAssistantJokes.rawValue)
                            print("DadJokeNum = \(self.countDadJokes)")
                        }
//                        var DadJokes.dadJokes.count = 1
                        print("count = \(AssistantJokes.assistantJokes.count)/\(self.countAssistantJokes)")
                        print("countAssistantJokes = \(self.countAssistantJokes)")
                        if reset == true {
                            AssistantJokes.assistantJokes.removeAll()
                        }
//                        for _ in 0...self.countDadJokes {
                        while AssistantJokes.assistantJokes.count <= self.countAssistantJokes {
//                            print("count = \(AssistantJokes.assistantJokes.count)/\(self.countAssistantJokes)")
                            if let Joke = document!.get("\(DadJokes.dadJokes.count + 1)") as? String {
                                print("AssistantJokeNum = \(self.countAssistantJokes)")
                                if Utilities.jokes.contains("\(Joke) - From Assistant Jokes") {}else {
                                    Utilities.jokes.append("\(Joke) - From Assistant Jokes")
                                    AssistantJokes.assistantJokes.append(Joke)
                                    UserDefaults.standard.set(AssistantJokes.assistantJokes, forKey: defaults.assistantJokes.rawValue)
                                    Utilities.updateJokesDefaults()
                                    print("countAssistantJokesSaved = \(AssistantJokes.assistantJokes.count)")
                                    print("AssistantJokesSaved = \(AssistantJokes.assistantJokes)")
                                }
                                print("Assistant Joke: \(Joke)")
//                                print("count = \(AssistantJokes.assistantJokes.count)/\(self.countAssistantJokes)")
                                if AssistantJokes.assistantJokes.count == self.countAssistantJokes {
                                    completion()
                                }
                            }
                        }
                    }
                }
            }
        }

它在 firebase 查询时停止。文件和一切都存在，因此，有什么问题？一切都存在，我真的很难过。我的目标是检索大量数据并显示一个随机主题。我觉得这应该比现在更容易。

这是我的 Firebase 设置：

Answer 1

我觉得这里的主要问题是您在 Firestore 中建模数据的方式。

您有一个名为 jokes 的集合，但随后有一个名为 Assistant Jokes、Dad Jokes 等的文档...

我认为更好的结构是让每个文档成为jokes 集合中的一个笑话。为每个笑话使用一个“自动 id”，然后在笑话文档中添加一个类型。

您必须在笑话列表旁边保留JokeNum，这一事实表明存在问题。

通过这种方式，您可以获取所有笑话或按特定类型过滤笑话等...

您的代码目前非常复杂，但我认为最好的方法是以有助于您的代码的方式构建数据。