使用NHibernate,更新父对象时如何添加子对象?
我在Person对象和Address对象之间有一个简单的父/子关系。数据库中存在Person对象。在对Person进行Get之后,我将一个新的Address对象添加到父对象的Address子对象列表中,并对Person对象进行一些其他更新。最后,我对Person对象进行更新。通过一个SQL跟踪窗口,我可以看到Person表中Person对象的更新以及Address表中地址记录的插入 问题是,在执行更新后,AddressId(Address对象上的主键)仍然设置为0,这是您首次初始化Address对象时的默认值。我已验证,当我进行加法时,此值设置正确。在尝试将子对象添加为NHibernate更新的一部分时,这是一个已知问题吗?下面是示例代码和映射文件 谢谢使用NHibernate,更新父对象时如何添加子对象?,nhibernate,nhibernate-mapping,Nhibernate,Nhibernate Mapping,我在Person对象和Address对象之间有一个简单的父/子关系。数据库中存在Person对象。在对Person进行Get之后,我将一个新的Address对象添加到父对象的Address子对象列表中,并对Person对象进行一些其他更新。最后,我对Person对象进行更新。通过一个SQL跟踪窗口,我可以看到Person表中Person对象的更新以及Address表中地址记录的插入 问题是,在执行更新后,AddressId(Address对象上的主键)仍然设置为0,这是您首次初始化Address
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="BusinessEntities.Wellness.Person,BusinessEntities.Wellness" table="Person" lazy="true" dynamic-insert="true" dynamic-update="false">
<id name="Personid" column="PersonID" type="int">
<generator class="native" />
</id>
<version type="binary" generated="always" name="RecordVersion" column="`RecordVersion`"/>
<property type="int" not-null="true" name="Customerid" column="`CustomerID`" />
<property type="AnsiString" not-null="true" length="9" name="Ssn" column="`SSN`" />
<property type="AnsiString" not-null="true" length="30" name="FirstName" column="`FirstName`" />
<property type="AnsiString" not-null="true" length="35" name="LastName" column="`LastName`" />
<property type="AnsiString" length="1" name="MiddleInitial" column="`MiddleInitial`" />
<property type="DateTime" name="DateOfBirth" column="`DateOfBirth`" />
<bag name="PersonAddresses" inverse="true" lazy="true" cascade="all">
<key column="PersonID" />
<one-to-many class="BusinessEntities.Wellness.PersonAddress,BusinessEntities.Wellness" /
</bag>
</class>
</hibernate-mapping>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="BusinessEntities.Wellness.PersonAddress,BusinessEntities.Wellness" table="PersonAddress" lazy="true" dynamic-insert="true" dynamic-update="false">
<id name="PersonAddressId" column="PersonAddressID" type="int">
<generator class="native" />
</id>
<version type="binary" generated="always" name="RecordVersion" column="`RecordVersion`" />
<property type="AnsiString" not-null="true" length="1" name="AddressTypeid" column="`AddressTypeID`" />
<property type="AnsiString" not-null="true" length="60" name="AddressLine1" column="`AddressLine1`" />
<property type="AnsiString" length="60" name="AddressLine2" column="`AddressLine2`" />
<property type="AnsiString" length="60" name="City" column="`City`" />
<property type="AnsiString" length="2" name="UsStateId" column="`USStateID`" />
<property type="AnsiString" length="5" name="UsPostalCodeId" column="`USPostalCodeID`" />
<many-to-one name="Person" cascade="none" column="PersonID" />
</class>
</hibernate-mapping>
Person newPerson = new Person();
newPerson.PersonName = "John Doe";
newPerson.SSN = "111111111";
newPerson.CreatedBy = "RJC";
newPerson.CreatedDate = DateTime.Today;
personDao.AddPerson(newPerson);
Person updatePerson = personDao.GetPerson(newPerson.PersonId);
updatePerson.PersonAddresses = new List<PersonAddress>();
PersonAddress addr = new PersonAddress();
addr.AddressLine1 = "1 Main St";
addr.City = "Boston";
addr.State = "MA";
addr.Zip = "12345";
updatePerson.PersonAddresses.Add(addr);
personDao.UpdatePerson(updatePerson);
int addressID = updatePerson.PersonAddresses[0].AddressId;
尝试:
这是您的C#代码,没有提供映射。请提供您的XML映射文件,以便我们可以帮助您。谢谢您的提示。不幸的是,在更新/添加完成后,updatePerson.PersonalAddresses[0].AddressId=0
updatePerson.PersonAddresses = new List<PersonAddress>();
PersonAddress addr = new PersonAddress();
addr.AddressLine1 = "1 Main St";
addr.City = "Boston";
addr.State = "MA";
addr.Zip = "12345";
updatePerson.PersonAddresses.Add(addr);
addr.Person = updatePerson
public void AddAddress(Address addr)
{
PersonAddresses.Add(addr);
addr.Person = this;
}