Question

我有一套简单的3个表，EF知道这些表是相关的......

在我的存储库中，我执行以下内容......

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

当我检查结果时，总是填充Lexicon并且Locale始终为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个表的所有适当的值......

那么，我在做什么/不这样做是阻止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视图来解决这个问题，但我试图了解EF正在做什么。

修改我在EF中使用Database First。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

您急切地加载所以您需要像这样更改您的代码。

<?php
//$today = date("F j, Y, g:i a");                 // March 10, 2001, 5:16 pm
//$today = date("m.d.y");                         // 03.10.01
//$today = date("j, n, Y");                       // 10, 3, 2001
//$today = date("Ymd");                           // 20010310
//$today = date('h-i-s, j-m-y, it is w Day');     // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
//$today = date('\i\t \i\s \t\h\e jS \d\a\y.');   // it is the 10th day.
//$today = date("D M j G:i:s T Y");               // Sat Mar 10 17:16:18 MST 2001
//$today = date('H:m:s \m \i\s\ \m\o\n\t\h');     // 17:03:18 m is month
//$today = date("H:i:s");                         // 17:16:18

echo $today;
?>

OR

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

这是有用的文件

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

实体框架不会包含（）所有表格

1 个答案: