在 app.seeting 文件中添加多个 MongoDb 集合以及如何从服务 class 中调用和使用它们

Question

我有多个集合，例如一个用于用户、课程、行动计划和疾病的集合，我如何将它们添加到 appsettings.json 以及如何在使用它们时在服务 class 中单独调用它们

appsetting.json 文件

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "DatabaseSettings": {
    "ConnectionString": "mongodb://localhost:27017",
    "DatabaseName": "local",
    "CollectionName": "startup_log"
  }
} 

启动文件

services.AddScoped<DataInterface, DataService>();
services.Configure<AppDbConfig>(Configuration.GetSection("DatabaseSettings"));

AppDbConfig Class

public class AppDbConfig
    {
    public string ConnectionString { get; set; } = null!;
    public string DatabaseName { get; set; } = null!;
    public string CollectionName { get; set; } = null!;
    }

数据服务Class

private readonly IMongoCollection<startup_log> startupLogs;
    public DataService(IOptions<AppDbConfig> settings)
    {
    MongoClient client = new MongoClient(settings.Value.ConnectionString);
    IMongoDatabase database = client.GetDatabase(settings.Value.DatabaseName);
    startupLogs = database.GetCollection< startup_log >(settings.Value.CollectionName);
    }

启动日志文件

public class startup_log
    {
        [BsonId]
        [BsonRepresentation(BsonType.ObjectId)]
        public string Id { get; set; }
        [BsonElement("hostname")]
        public string HostName { get; set; } = null!;
        [BsonElement("startTime")]
        public DateTime StartTime { get; set; } 
        [BsonElement("startTimeLocal")]
        public string StartTimeLocal { get; set; } = null!;
    }

Answer 1

为了支持不同的集合，您可以在您的配置中重命名 CollectionName 属性 并为您需要支持的每个集合创建一个 属性，例如

public class AppDbConfig
{
  public string ConnectionString { get; set; } = null!;
  public string DatabaseName { get; set; } = null!;
  public string StartupLogsCollectionName { get; set; } = null!;
  public string OtherCollectionName { get; set; } = null!;
}

---

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "DatabaseSettings": {
    "ConnectionString": "mongodb://localhost:27017",
    "DatabaseName": "local",
    "StartupLogsCollectionName": "startup_log",
    "OtherCollectionName": "otherDocs"
  }
} 

在您的 DataService 中，您可以在设置服务时使用不同的集合名称：

private readonly IMongoCollection<startup_log> startupLogs;
private readonly IMongoCollection<OtherType> otherColl;

public DataService(IOptions<AppDbConfig> settings)
{
  MongoClient client = new MongoClient(settings.Value.ConnectionString);
  IMongoDatabase database = client.GetDatabase(settings.Value.DatabaseName);
  startupLogs = database.GetCollection<startup_log>(settings.Value.StartupLogsCollectionName);
  otherColl = database.GetCollection<OtherType>(settings.Value.OtherCollectionName);
}