Linq2Db：如何在（批量）插入上包含導航屬性

Question

我正在嘗試使用批量插入功能。 我的 model 看起來像這樣：

public class Stockprice
{
    [Key]
    public int Id { get; set; }
    
    [Required]
    [LinqToDB.Mapping.Association(ThisKey = "StockId", OtherKey = "Id")]
    public Stock Stock { get; set; }
    
    //some more
}

public class MinuteStockprice : Stockprice { }

代碼插入代碼：

private async Task SavePrices<T>(List<Quote> quotes) where T : Stockprice, new()
{
    using var context = _factory.CreateDbContext();
    var connection = context.CreateLinqToDbConnection();
    connection.TraceSwitchConnection.Level = TraceLevel.Verbose;
    connection.OnTraceConnection = x => Console.WriteLine(x.SqlText);
    var stocks = new List<T>();
    foreach (var quote in quotes)
    {
        var price = new T { Stock = new Stock() { Id = _isinToStockId[quote.Isin] }, Ask = quote.Ask, Bid = quote.Bid, Time = quote.Time };
        stocks.Add(price);
        context.Stocks.Attach(price.Stock);
    }
    await connection.BulkCopyAsync(stocks);
    //await context.BulkCopyAsync(stocks);
}

不知道我錯過了什么，但它沒有插入 StockId。 這是生成的 Sql 的頭部：

INSERT INTO [MinuteStockprices]
(
        [Time],
        [Ask],
        [Bid]
)

如何在此處包含 StockId？

編輯

該表是這樣創建的：

CREATE TABLE "MinuteStockprices" (
    "Id" INTEGER NOT NULL CONSTRAINT "PK_MinuteStockprices" PRIMARY KEY AUTOINCREMENT,
    "StockId" INTEGER NOT NULL,
    "Bid" REAL NOT NULL,
    "Ask" REAL NOT NULL,
    "Time" TEXT NOT NULL,
    CONSTRAINT "FK_MinuteStockprices_Stocks_StockId" FOREIGN KEY ("StockId") REFERENCES "Stocks" ("Id") ON DELETE CASCADE
)

Answer 1

BulkCopy是低級命令，它插入到一張表中，並且只在一張表中。 如果您需要插入詳細信息，則必須單獨進行。

還要檢查 class 是否具有StockId屬性，因為不支持陰影屬性。