实体框架 TT 模板 -> 基于外键 ID 的导航属性名称

Question

我有下表：

CREATE TABLE Phone(
PhoneId INT IDENTITY (1, 1) NOT NULL,
CONSTRAINT PK_Phone PRIMARY KEY CLUSTERED (PhoneId ASC))

CREATE TABLE Person(
PersonId INT IDENTITY (1, 1) NOT NULL,
MobilePhoneId INT NOT NULL,
PhoneId INT NOT NULL,
...

CONSTRAINT PK_Person PRIMARY KEY CLUSTERED (PersonId ASC),
CONSTRAINT FK_Projects_Phone FOREIGN KEY (PhoneId)
    REFERENCES Phone(PhoneId),
CONSTRAINT FK_Projects_MobileId FOREIGN KEY (MobilePhoneId)
    REFERENCES Phone(PhoneId),
...

我正在使用 EF，我想根据外键生成导航属性，删除 Id 部分，所以我想拥有导航属性 Phone 和 MobilePhone。我尝试调试，但我没有找到外键存储在哪里。请帮助 TT 模板：我应该在哪里修改和修改什么。

Answer 1

您可以通过在设计器中编辑 edmx 或编辑 T4 模板来完成。当您想编辑 T4 模板（您的模型 .tt 文件）时，请尝试修改：

public string NavigationProperty(NavigationProperty navProp)
{
    var endType = _typeMapper.GetTypeName(navProp.ToEndMember.GetEntityType());
    return string.Format(
        CultureInfo.InvariantCulture,
        "{0} {1} {2} {{ {3}get; {4}set; }}",
        AccessibilityAndVirtual(Accessibility.ForNavigationProperty(navProp)),
        navProp.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many ? ("ICollection<" + endType + ">") : endType,
        _code.Escape(navProp),
        _code.SpaceAfter(Accessibility.ForGetter(navProp)),
        _code.SpaceAfter(Accessibility.ForSetter(navProp)));
}

这样：

public string NavigationProperty(NavigationProperty navProp)
{
    var navigationPropertyName = _code.Escape(navProp);
    var match = System.Text.RegularExpressions.Regex.Match(navigationPropertyName, "^(?<a>.+)Id$");
    if(match.Success)
        navigationPropertyName = match.Groups[1].Value;

    var endType = _typeMapper.GetTypeName(navProp.ToEndMember.GetEntityType());
    return string.Format(
        CultureInfo.InvariantCulture,
        "{0} {1} {2} {{ {3}get; {4}set; }}",
        AccessibilityAndVirtual(Accessibility.ForNavigationProperty(navProp)),
        navProp.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many ? ("ICollection<" + endType + ">") : endType,
        navigationPropertyName,
        _code.SpaceAfter(Accessibility.ForGetter(navProp)),
        _code.SpaceAfter(Accessibility.ForSetter(navProp)));
}