DbSet.Include运算符，用于ef7接受字符串路径

问题描述

EF6具有DbSet.Include的重载，它接受一个字符串参数，该字符串参数表示以点分隔的相关对象列表，以返回查询结果。这对于在多级对象图中快速加载实体很有用。例如：

EF6 has an overload of DbSet.Include which accepts a string parameter representing a dot-separated list of related objects to return in the query results. It is useful for eager-loading entities in a multi-level object graph. For example:

var order = await _dbContext.Orders
    .Include(o => o.Customer)
    .Include("OrderDetails.Product") // dot-delimited path
    .SingleOrDefaultAsync(o => o.OrderId == id);

这将返回两个相关的订单明细，并通过生成一条SQL语句填充每个明细的Product属性。联接OrderDetail和Product表。

This will return both related order details and populate the Product property of each detail by generating a SQL statement that joins OrderDetail and Product tables.

我正在寻找一种使用EF7的方法，但是我没有看到 DbSet.Include 的重载。 >接受 string 路径参数。 EF7是否提供与EF6 API相同的结果？

I am looking a way to do this with EF7, but I don't see an overload of DbSet.Include which accepts a string path parameter. Does EF7 provide a way to achieve the same result as the EF6 API?

PS。我只是注意到问题已打开，看来它可以解决我的问题。

PS. I just noticed issue #1151 is open, and it looks like it may address my question.

推荐答案

您正确地认为正在跟踪这种情况。还有一些设计会议记录，总结了将在EF7中使用的API-。

You are correct that #1151 is tracking this scenario. There are also some design meeting notes that summarize the API that will be available in EF7 - https://github.com/aspnet/EntityFramework/wiki/Design-Meeting-Notes:-January-8,-2015.

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