Question

到目前为止，我的存储库中有以下代码：

public MyRepo(ILog logger)
{
    this.Logger = logger;

    var mongoUrlBuilder = new MongoUrlBuilder(ConfigurationManager.ConnectionStrings["MyContext"].ConnectionString);
    this.MongoClient = new MongoClient(mongoUrlBuilder.ToMongoUrl());
    this.MongoDatabase = this.MongoClient.GetDatabase("MyDB");
    this.UserCollection = this.MongoDatabase.GetCollection<MyModel>("pro");
}

这就是我使用unity DI容器的方式：

var container = new UnityContainer();

container.RegisterType<IMyModel, MyModel>();

RegisterTypes(container);
return container;

如何使用unity DI来注入MongoDb？

我要问的主要原因是因为我希望能够模拟mongoDb并对其进行测试。这些要求要求我使用Unity DI和MongoDb。

更新

最终，我选择了以下内容。我添加了一个看起来像这样的Db上下文类：

public class MongoDbContext
    {
        public const string CONNECTION_STRING_NAME = "DBContext";
        public const string DATABASE_NAME = "MyDb";

        private static readonly IMongoClient Client;
        private static readonly IMongoDatabase Database;

        static MongoDbContext()
        {
            var connectionString = ConfigurationManager.ConnectionStrings[CONNECTION_STRING_NAME].ConnectionString;
            Client = new MongoClient(connectionString);
            Database = Client.GetDatabase(DATABASE_NAME);
        }

        public IMongoCollection<TEntity> GetCollection<TEntity>()
        {
            return Database.GetCollection<TEntity>(typeof(TEntity).Name.ToLower() + "s");
        }
    }

在MongoRepository中使用它：

      public class MyRepository<TModel> : IGenericMongoRepository<TModel> where TModel : BaseModel
        {
            private MongoDbContext MongoDbContext = null;

            public Exception OperationException { get; set; }
            private ILog Logger;

            public MyRepository(ILog logger)
            {
                this.Logger = logger;
                this.MongoDbContext = new MongoDbContext();
            }
      public async Task<TModel> Add(TModel item)      
        {
            try
            {
                IMongoCollection<TModel> collection = this.GetCollection<TModel>();
                await collection.InsertOneAsync(item);
                return item;
            }
        catch (Exception e)
        {
        }
    }
}

Answer 1

您可以重构repo以将mongo数据库作为可注入依赖项

private IMongoDatabase database;
private ILog Logger;
private IMongoCollection<MyModel> UserCollection;

public MyRepo(ILog logger, IMongoDatabase database) {
    this.Logger = logger;
    this.database = database;
    this.UserCollection = database.GetCollection<MyModel>("pro");
}

然后可以将实例的创建移动到组合根

//Create the database instance
var mongoUrlBuilder = new MongoUrlBuilder(ConfigurationManager.ConnectionStrings["MyContext"].ConnectionString);
var client = new MongoClient(mongoUrlBuilder.ToMongoUrl());
var database = client.GetDatabase("MyDB");

var container = new UnityContainer();
container.RegisterType<IMyModel, MyModel>();
// Register existing object instance
container.RegisterInstance<IMongoDatabase>(database);

RegisterTypes(container);
return container;

使用unity depencendy injection

1 个答案: