嗨 我有父母與子女表像下面插入到父和子表
<?xml version="1.0" encoding="utf-8"?>
------- parent --------------
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="HibernateSample.StudMarks,HibernateSample" table="StudMarks" lazy="false">
<id name="Sno" column="SNO" type="int">
<generator class="assigned"/>
</id>
<many-to-one name="Student" column="ID" not-null="true"/>
<property name="Marks" column="Marks" type="int" not-null="true" />
<property name="Rank" column="Rank" type="int" not-null="true" />
</class>
</hibernate-mapping>
------- child --------------
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="HibernateSample.Student,HibernateSample" table="Student" lazy="false">
<id name="Id" column="ID" type="int">
<generator class="native" />
</id>
<property name="Name" column="Name" type="string" not-null="true" />
<property name="Standard" column="Standard" type="string" not-null="true" />
<bag name="StudMarks" cascade="all" lazy="false">
<key column="ID" not-null="true"/>
<one-to-many class="HibernateSample.StudMarks,HibernateSample" />
</bag>
</class>
</hibernate-mapping>
和.cs文件我有這樣編寫的代碼像下面插入到父母和孩子。
StudMarks sm = new StudMarks();
Student st = new Student();
List<StudMarks> sms = new List<StudMarks>();
st.Id = 9;
st.Name = "stud 999";
st.Standard = "99";
sm.Sno = 9;
sm.Marks = 99;
sm.Rank = 9;
sm.Student = st; ------ **Line 1**
st.StudMarks = sms; ------ **Line 2**
session.Save(sm);
session.Flush();
如果我在上面的代碼中提交「Line 1」,則只有小孩正在插入。如果我評論「第2行」外鍵約束錯誤正在拋出。
表:
CREATE TABLE [dbo].[Student](
[ID] [int] IDENTITY(1,1) NOT NULL, -- PRIMARY KEY
[Name] [varchar](50) NOT NULL,
[Standard] [varchar](50) NOT NULL,
CREATE TABLE [dbo].[StudMarks](
[SNO] [int] NOT NULL, -- PRIMARY KEY
[ID] [int] NOT NULL, -- FOREIGN KEY
[Marks] [int] NOT NULL,
[Rank] [int] NOT NULL,)
請讓我知道如何在父母子女在單個保存操作一次插入。
任何你沒有在分配給st.StudMarks之前將'sm'添加到'sms'列表中的原因? – 2010-12-02 04:49:08
我加了sms.Add(sm);在「Line 1」之前,並且在不更改hbm文件的情況下工作。非常感謝。 – jcreddy 2010-12-02 05:38:58