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我在理解一些代碼時遇到了一些麻煩。我有2類公司和公司位置。映射爲:NHibernate Criteria查詢樓
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Core.DataTransfer.CompanyLocation,Core.DataTransfer" table="`CompanyLocation`" lazy="true">
<id name="CompanyLocationId" column="`CompanyLocationID`" type="int">
<generator class="native" />
</id>
<many-to-one name="Company" cascade="none" column="`CompanyID`" not-null="true" />
</class>
</hibernate-mapping>
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Core.DataTransfer.Company,Core.DataTransfer" table="`Company`" lazy="true">
<id name="CompanyId" column="`CompanyID`" type="int">
<generator class="native" />
</id>
<property type="string" not-null="true" length="100" name="CompanyName" column="`CompanyName`" />
<bag name="CompanyLocations" inverse="true" lazy="true" cascade="all">
<key column="`CompanyID`" />
<one-to-many class="Core.DataTransfer.CompanyLocation,Core.DataTransfer" />
</bag>
</class>
</hibernate-mapping>
我試圖用一個標準查詢,如下查詢:
public IList<CompanyLocation> GetCompanyLocations(string sortExpression)
{
ICriteria criteria = _session.CreateCriteria(typeof(CompanyLocation));
if (!string.IsNullOrEmpty(sortExpression))
{
Sort sort = new Sort(sortExpression);
if (!string.IsNullOrEmpty(sort.AssociationPath))
{
criteria.CreateCriteria(sort.AssociationPath).AddOrder(new Order(sort.SortColumn, sort.IsAscending));
}
// if (!string.IsNullOrEmpty(sort.AssociationPath))
// {
// criteria.CreateCriteria(sort.AssociationPath);
// }
// criteria.AddOrder(new Order(sort.SortColumn, sort.IsAscending));
}
return criteria.List<CompanyLocation>();
}
當我調用該方法,並傳遞「Company.CompanyName DESC」排序類的的SortExpression將解析它,以便: AssociationPath =「公司」 SortColumn =「公司名稱」 IsAscending =假
IF塊在沒有被註釋掉工程的方法。如果我更改爲被註釋掉失敗與一個: 無法解析屬性:公司
我無法理解爲什麼。