c# - Entity Framework 不会包含()所有表

Question

我有一组简单的 3 个表，EF 知道它们是相关的...

在我的存储库中，我执行以下...

var result = localContext.LexiconTerms.Include(i=>i.Locale).Include(i=>i.Lexicon)

当我检查结果时 Lexicon 总是被填充并且 Locale 总是 null

现在，如果我查看生成的 SQL，我会看到这个......

SELECT 
    [Extent1].[Id] AS [Id], 
    [Extent1].[LexiconId] AS [LexiconId], 
    [Extent1].[ResourceId] AS [ResourceId], 
    [Extent1].[Value] AS [Value], 
    [Extent1].[LocaleId] AS [LocaleId], 
    [Extent1].[ResourceSet] AS [ResourceSet], 
    [Extent1].[Type] AS [Type], 
    [Extent1].[BinFile] AS [BinFile], 
    [Extent1].[TextFile] AS [TextFile], 
    [Extent1].[Filename] AS [Filename], 
    [Extent1].[Comment] AS [Comment], 
    [Extent1].[ValueType] AS [ValueType], 
    [Extent1].[Updated] AS [Updated], 
    [Extent2].[Name] AS [Name], 
    [Extent2].[LocaleCode] AS [LocaleCode], 
    [Extent3].[Id] AS [Id1], 
    [Extent3].[Name] AS [Name1], 
    [Extent3].[Description] AS [Description], 
    [Extent3].[DeletedOn] AS [DeletedOn]
    FROM   [Locale].[LexiconTerms] AS [Extent1]
    INNER JOIN [Locale].[Locale] AS [Extent2] ON [Extent1].[LocaleId] = [Extent2].[LocaleCode]
    INNER JOIN [Locale].[Lexicon] AS [Extent3] ON [Extent1].[LexiconId] = [Extent3].[Id]
    WHERE (N'Test1' = [Extent1].[ResourceId]) AND (N'UnitTest' = [Extent1].[ResourceSet]) AND (-2 = [Extent1].[LexiconId]) AND ([Extent1].[LocaleId] = @p__linq__0)

这清楚地表明 EF 正在获取数据。此外，在 SSMS 中运行 SQL，我可以看到所有 3 个表的所有适当值...

那么，我在做什么/不做什么是为了阻止 EF 填充一个相关对象而不是另一个？

我知道我可以通过创建 View 等方式解决这个问题，但我试图了解 EF 正在做什么。

编辑:我在 EF 中使用数据库优先。这些是 EF 生成的类...

public partial class Lexicon
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Lexicon()
    {
        this.LexiconTerms = new HashSet<LexiconTerm>();
    }

    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public Nullable<System.DateTime> DeletedOn { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<LexiconTerm> LexiconTerms { get; set; }
}

public partial class LexiconTerm
{
    public int Id { get; set; }
    public int LexiconId { get; set; }
    public string ResourceId { get; set; }
    public string Value { get; set; }
    public string LocaleId { get; set; }
    public string ResourceSet { get; set; }
    public string Type { get; set; }
    public byte[] BinFile { get; set; }
    public string TextFile { get; set; }
    public string Filename { get; set; }
    public string Comment { get; set; }
    public int ValueType { get; set; }
    public Nullable<System.DateTime> Updated { get; set; }

    public virtual Lexicon Lexicon { get; set; }
    public virtual Locale Locale { get; set; }
}

public partial class Locale
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Locale()
    {
        this.LexiconTerms = new HashSet<LexiconTerm>();
    }

    public string Name { get; set; }
    public string LocaleCode { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<LexiconTerm> LexiconTerms { get; set; }
}

Answer 1

您使用急切加载，所以您需要像这样更改您的代码。

var result = localContext.LexiconTerms.Include(i=>i.Locale.Lexicon) 

或

var result = localContext.LexiconTerms.Include("Locale.Lexicon") 

有用的文档

https://msdn.microsoft.com/en-us/data/jj574232.aspx