Question

我有这张表：

Person -> PersonFavorites, PersonCompany
PersonCompany -> Company

我现在要用NHibernate和QueryOver进行以下选择：

select * from Person 
  inner join PersonFavorites on Person.Id = PersonFavorites.PersonId 
  inner join PersonCompany on Person.Id = PersonCompany.PersonId 
  inner join Company on Company.Id = PersonCompany.CompanyId
where ...

有人可以给我一个样品，我该怎么做？ - 我的问题是，我必须加入多个表格人员 - ＆gt; PersonCompany - ＆gt;公司。加入人 - ＆gt; PersonCompany and Person - ＆gt; PersonFavorites没问题 - 但是PersonCompany的下一步 - ＆gt;公司。

Answer 1

映射应类似于以下内容：

<强>实体

class Person
{
    Collection<PersonFavorites> favorites;
    Collection<PersonCompany> companies;
}

class PersonFavorite
{
    Person person;
    Favorite favorite;
}

class PersonCompany
{
    Person person;
    Company company;
}

<强>查询

Person personAlias = null;
PersonFavorites personfavouriteAlias = null;
PersonCompany personCompanyAlias  = null;
Company companyAlias = null;
Favorite favouriteAlias = null;

var query = Session.QueryOver<Person>(() => personAlias)
    .joinAlias(() => personAlias.favorites, () => personfavouriteAlias)
    .joinAlias(() => personAlias.companies, () => personCompanyAlias)
    .joinAlias(() => personfavouriteAlias.Favourite, () => favouriteAlias)
    .joinAlias(() => personCompanyAlias.Company, () => companyAlias)

使用NHibernate和QueryOver连接多个表

1 个答案: