在Entity Framework中使用代码优先dbcontext进行选择时出现EntitySqlException

Question

什么时候

var codeFirstRepositor = new Donors();
var list = codeFirstRepositor.CampaignReps.Select(c => c).ToList();

• 当我在CampaignRep类构造函数中放置一个断点时，根本不会调用它-异常似乎发生在对象实例化之前

语境

public class Donors : DbContext
{
    public Donors()
    {
        // Needed for WCF serialization to work
        Configuration.ProxyCreationEnabled = false;
    }
    public DbSet<CampaignRep> CampaignReps { get; set; }
}

EntitySqlException

'CampaignsReps' is not a member of Transient.collection[MyNameSpace.Donor(Nullable=True,DefaultValue=)]'. To extract a property of a collection element, use a subquery to iterate over the collection. Near escaped identifier, line 1, column 10.

此错误的原因是什么？

Answer 1

删除Select（c => c），然后重试。 另外，为什么还要在查询中添加呢？