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Fluent nhibernate fluent nhibernate映射问题：多对一…无法插入：[实体]

fluent-nhibernate

Fluent nhibernate fluent nhibernate映射问题：多对一…无法插入：[实体],fluent-nhibernate,fluent-nhibernate-mapping,Fluent Nhibernate,Fluent Nhibernate Mapping,我在Foo和Bar之间有一对多的关系，我无法执行插入（到目前为止，我只尝试了select和insert…select似乎工作得很好，每次插入都失败） 表格定义： CREATE TABLE [Bar]( [Id] [int] IDENTITY(1,1) NOT NULL, [DateField] [datetime] NULL, [StringField] [varchar](8000) NULL CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC

我在Foo和Bar之间有一对多的关系，我无法执行插入（到目前为止，我只尝试了select和insert…select似乎工作得很好，每次插入都失败）

表格定义：

CREATE TABLE [Bar](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DateField] [datetime] NULL,
[StringField] [varchar](8000) NULL
CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC)) ON PRIMARY

CREATE TABLE [Foo](
[Id] [int] IDENTITY(1,1) NOT NULL,
[BarId] [int] NOT NULL,
[DateField] [date] NOT NULL,
[StringField] [varchar](100) NOT NULL,
[GorpId] [int] NOT NULL,
[BoolField] [bit] NOT NULL
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED([Id] ASC))

ALTER TABLE [dbo].[Foo]  WITH CHECK ADD  CONSTRAINT [FK_Foo_Bar] FOREIGN KEY([BarId])
REFERENCES [dbo].[Bar] ([Id])
GO

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField);
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Bar`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="StringField" />
        </property>
        <bag cascade="save-update" inverse="true" name="Foos" mutable="true">
            <key foreign-key="FK_Foo_Bar" not-null="true">
                <column name="BarId" />
            </key>
            <one-to-many class="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" />
        </bag>
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Foo`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="BoolField" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="BoolField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
             <column name="StringField" />
        </property>
        <many-to-one class="MyApp.Domain.Model.Gorp, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" name="Gorp">
            <column name="GorpId" />
        </many-to-one>
        <many-to-one class="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" insert="false" name="Bar" update="false">
            <column name="BarId" not-null="true" />
        </many-to-one>
    </class>
</hibernate-mapping>
类定义：

CREATE TABLE [Bar](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DateField] [datetime] NULL,
[StringField] [varchar](8000) NULL
CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC)) ON PRIMARY

CREATE TABLE [Foo](
[Id] [int] IDENTITY(1,1) NOT NULL,
[BarId] [int] NOT NULL,
[DateField] [date] NOT NULL,
[StringField] [varchar](100) NOT NULL,
[GorpId] [int] NOT NULL,
[BoolField] [bit] NOT NULL
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED([Id] ASC))

ALTER TABLE [dbo].[Foo]  WITH CHECK ADD  CONSTRAINT [FK_Foo_Bar] FOREIGN KEY([BarId])
REFERENCES [dbo].[Bar] ([Id])
GO

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField);
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Bar`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="StringField" />
        </property>
        <bag cascade="save-update" inverse="true" name="Foos" mutable="true">
            <key foreign-key="FK_Foo_Bar" not-null="true">
                <column name="BarId" />
            </key>
            <one-to-many class="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" />
        </bag>
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Foo`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="BoolField" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="BoolField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
             <column name="StringField" />
        </property>
        <many-to-one class="MyApp.Domain.Model.Gorp, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" name="Gorp">
            <column name="GorpId" />
        </many-to-one>
        <many-to-one class="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" insert="false" name="Bar" update="false">
            <column name="BarId" not-null="true" />
        </many-to-one>
    </class>
</hibernate-mapping>

公共类Foo
{
公共虚拟整数Id{get；set；}
公共虚拟条{get；set；}
公共虚拟日期时间日期字段{get；set；}
公共虚拟字符串字符串字段{get；set；}
公共虚拟Gorp Gorp{get；set；}
公共虚拟布尔布尔字段{get；set；}
}
公共类酒吧
{
公共虚拟整数Id{get；set；}
公共虚拟日期时间日期字段{get；set；}
公共虚拟字符串字符串字段{get；set；}
公共虚拟ICollection Foos{get；set；}
公共酒吧（）
{
Foos=新列表（）；
}
公共虚拟void AddFoo（Foo-Foo）
{
foo.Bar=这个；
添加（foo）；
}
}
映射：

CREATE TABLE [Bar](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DateField] [datetime] NULL,
[StringField] [varchar](8000) NULL
CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC)) ON PRIMARY

CREATE TABLE [Foo](
[Id] [int] IDENTITY(1,1) NOT NULL,
[BarId] [int] NOT NULL,
[DateField] [date] NOT NULL,
[StringField] [varchar](100) NOT NULL,
[GorpId] [int] NOT NULL,
[BoolField] [bit] NOT NULL
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED([Id] ASC))

ALTER TABLE [dbo].[Foo]  WITH CHECK ADD  CONSTRAINT [FK_Foo_Bar] FOREIGN KEY([BarId])
REFERENCES [dbo].[Bar] ([Id])
GO

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField);
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Bar`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="StringField" />
        </property>
        <bag cascade="save-update" inverse="true" name="Foos" mutable="true">
            <key foreign-key="FK_Foo_Bar" not-null="true">
                <column name="BarId" />
            </key>
            <one-to-many class="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" />
        </bag>
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Foo`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="BoolField" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="BoolField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
             <column name="StringField" />
        </property>
        <many-to-one class="MyApp.Domain.Model.Gorp, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" name="Gorp">
            <column name="GorpId" />
        </many-to-one>
        <many-to-one class="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" insert="false" name="Bar" update="false">
            <column name="BarId" not-null="true" />
        </many-to-one>
    </class>
</hibernate-mapping>

公共类FooMap:ClassMap
{
公共地图（）
{
Id（x=>x.Id）.UnsavedValue（0）.GeneratedBy.Identity（）；
Map（x=>x.DateField）；
Map（x=>x.BoolField）；
Map（x=>x.StringField）；
参考（x=>x.Gorp）
.栏（“GorpId”）
.Class（）；
参考（x=>x.Bar）
.栏（“BarId”）
.Not.Nullable（）；
}
}
公共类条形图：类映射
{
Id（x=>x.Id）.UnsavedValue（0）.GeneratedBy.Identity（）；
Map（x=>x.DateField）；
Map（x=>x.StringField）；
HasMany（x=>x.Foos）
.AsBag（）
.Cascade.SaveUpdate（）
.ForeignKeyConstraintName（“FK_Foo_Bar”）
.Inverse（）
.KeyColumn（“BarId”）
.Not.KeyNullable（）；
}
生成的XML:

CREATE TABLE [Bar](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DateField] [datetime] NULL,
[StringField] [varchar](8000) NULL
CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC)) ON PRIMARY

CREATE TABLE [Foo](
[Id] [int] IDENTITY(1,1) NOT NULL,
[BarId] [int] NOT NULL,
[DateField] [date] NOT NULL,
[StringField] [varchar](100) NOT NULL,
[GorpId] [int] NOT NULL,
[BoolField] [bit] NOT NULL
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED([Id] ASC))

ALTER TABLE [dbo].[Foo]  WITH CHECK ADD  CONSTRAINT [FK_Foo_Bar] FOREIGN KEY([BarId])
REFERENCES [dbo].[Bar] ([Id])
GO

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField);
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Bar`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="StringField" />
        </property>
        <bag cascade="save-update" inverse="true" name="Foos" mutable="true">
            <key foreign-key="FK_Foo_Bar" not-null="true">
                <column name="BarId" />
            </key>
            <one-to-many class="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" />
        </bag>
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Foo`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="BoolField" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="BoolField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
             <column name="StringField" />
        </property>
        <many-to-one class="MyApp.Domain.Model.Gorp, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" name="Gorp">
            <column name="GorpId" />
        </many-to-one>
        <many-to-one class="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" insert="false" name="Bar" update="false">
            <column name="BarId" not-null="true" />
        </many-to-one>
    </class>
</hibernate-mapping>
例外情况：

CREATE TABLE [Bar](
[Id] [int] IDENTITY(1,1) NOT NULL,
[DateField] [datetime] NULL,
[StringField] [varchar](8000) NULL
CONSTRAINT [PK_Bar] PRIMARY KEY CLUSTERED([Id] ASC)) ON PRIMARY

CREATE TABLE [Foo](
[Id] [int] IDENTITY(1,1) NOT NULL,
[BarId] [int] NOT NULL,
[DateField] [date] NOT NULL,
[StringField] [varchar](100) NOT NULL,
[GorpId] [int] NOT NULL,
[BoolField] [bit] NOT NULL
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED([Id] ASC))

ALTER TABLE [dbo].[Foo]  WITH CHECK ADD  CONSTRAINT [FK_Foo_Bar] FOREIGN KEY([BarId])
REFERENCES [dbo].[Bar] ([Id])
GO

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField);
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable();
}

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Bar`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="StringField" />
        </property>
        <bag cascade="save-update" inverse="true" name="Foos" mutable="true">
            <key foreign-key="FK_Foo_Bar" not-null="true">
                <column name="BarId" />
            </key>
            <one-to-many class="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" />
        </bag>
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
    <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="MyApp.Domain.Model.Foo, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" table="`Foo`">
        <id name="Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" unsaved-value="0">
            <column name="Id" />
            <generator class="identity" />
        </id>
        <property name="DateField" type="System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="DateField" />
        </property>
        <property name="BoolField" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <column name="BoolField" />
        </property>
        <property name="StringField" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
             <column name="StringField" />
        </property>
        <many-to-one class="MyApp.Domain.Model.Gorp, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" name="Gorp">
            <column name="GorpId" />
        </many-to-one>
        <many-to-one class="MyApp.Domain.Model.Bar, MyApp.Domain, Version=3.5.0.0, Culture=neutral, PublicKeyToken=null" insert="false" name="Bar" update="false">
            <column name="BarId" not-null="true" />
        </many-to-one>
    </class>
</hibernate-mapping>
无法插入：[MyApp.Domain.Model.Foo][SQL:插入[Foo]（DateField、BoolField、StringField、GorpId、BarId）值（？、、？、？）；选择作用域标识（）

我遗漏了什么/误解了什么？

如果在创建新对象时未显式初始化属性，它将接收默认值。对于datetime，默认值为datetime.minvalue

datetime.minvalue的日期比sql server允许的日期早。这是因为.net和sql server不支持相同的日期时间范围，但事实就是如此。当您尝试将datetime.minvalue插入sql server时，您会看到异常

解决方法是始终为新对象提供该属性的值，在数据库中为该列创建默认值，或者使datatime属性为空（DateTime？）

这实际上与类之间的关系无关，只与使用默认值的未初始化的不可为null的datetime属性有关。

如果在创建新对象时未显式初始化属性，它将接收默认值。对于datetime，默认值为datetime.minvalue

datetime.minvalue的日期比sql server允许的日期早。这是因为.net和sql server不支持相同的日期时间范围，但事实就是如此。当您尝试将datetime.minvalue插入sql server时，您会看到异常

解决方法是始终为新对象提供该属性的值，在数据库中为该列创建默认值，或者使datatime属性为空（DateTime？）

这实际上与类之间的关系无关，只与使用默认值的未初始化的不可为null的datetime属性有关。

谢谢Dave为我指明了正确的方向。其中一个日期字段在数据库中可为空，另一个不可为空。为了反映这一点，我改变了我的班级和地图。瞧！成功了

太糟糕了，原来的错误消息没有告诉我datetime字段有问题，这会让我省去一些麻烦

我做了以下修改：

public class Foo
{
    public virtual int Id { get; set; }
    public virtual Bar Bar{ get; set; }
    public virtual DateTime DateField{ get; set; }
    public virtual string StringField{ get; set; }
    public virtual Gorp Gorp{ get; set; }
    public virtual bool BoolField{ get; set; }

    public Foo()
    {
        DateField = new DateTime(1753, 1, 1);
    }
}

public class Bar
{
    public virtual int Id { get; set; }
    public virtual DateTime? DateField{ get; set; }
    public virtual string StringField{ get; set; }

    public virtual ICollection<Foo> Foos{ get; set; }

    public Bar()
    {
        DateField = new DateTime(1753, 1, 1);
        Foos= new List<Foo>();
    }

    public virtual void AddFoo(Foo foo)
    {
        foo.Bar = this;
        Foos.Add(foo);
    }
}


public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
        Map(x => x.DateField);
        Map(x => x.BoolField);
        Map(x => x.StringField);
        References(x => x.Gorp)
          .Column("GorpId")
          .Class<Gorp>();
        References(x => x.Bar)
          .Column("BarId")
          .Not.Nullable();
    }
}

public class BarMap : ClassMap<Bar>
{
    Id(x => x.Id).UnsavedValue(0).GeneratedBy.Identity();
    Map(x => x.DateField)
          .Nullable();
    Map(x => x.StringField);

    HasMany<Foo>(x => x.Foos)
      .AsBag()
      .Cascade.SaveUpdate()
      .Fetch.Join()
      .ForeignKeyConstraintName("FK_Foo_Bar")
      .Inverse()
      .KeyColumn("BarId")
      .Not.KeyNullable()
      .Table("Foo");
}

公共类Foo
{
公共虚拟整数Id{get；set；}
公共虚拟条{get；set；}
公共虚拟日期时间日期字段{get；set；}
公共虚拟字符串字符串字段{get；set；}
公共虚拟Gorp Gorp{get；set；}
公共虚拟布尔布尔字段{get；set；}
公共食物（
{
DateField=新的日期时间（1753,1,1）；
}
}
公共类酒吧
{
公共虚拟整数Id{get；set；}
公共虚拟日期时间？日期字段{get；set；}
公共虚拟字符串字符串字段{get；set；}
公共虚拟ICollection Foos{get；set；}
公共酒吧（）
{
DateField=新的日期时间（1753,1,1）；
Foos=新列表（）；
}
公共虚拟void AddFoo（Foo-Foo）
{
foo.Bar=这个；
添加（foo）；
}
}
公共类FooMap:ClassMap
{
公共地图（）
{
Id（x=>x.Id）.UnsavedValue（0）.GeneratedBy.Identity（）；
Map（x=>x.DateField）；
Map（x=>x.BoolField）；
Map（x=>x.StringField）；
参考（x=>x.Gorp）
.栏（“GorpId”）
.Class（）；
参考（x=>x.Bar）
.栏（“BarId”）
.Not.Nullable（）；
}
}
公共类条形图：类映射
{
Id（x=>x.Id）.UnsavedValue（0）.GeneratedBy.Identity（）；
映射（x=>x.DateField）
.Nullable（）；
Map（x=>x.StringField）；
HasMany（x=>x.Foos）
.AsBag（）
.Cascade.SaveUpdate（）
.Fetch.Join（）
.ForeignKeyConstraintName（“FK_Foo_Bar”）
.Inverse（）
.KeyColumn（“BarId”