Linq 如何在RavenDB查询中对一组筛选器运算符进行分组?
对于RavenDB中的过滤产品,我使用产品过滤器的通用列表,以避免长时间切换 product filter类看起来像:Linq 如何在RavenDB查询中对一组筛选器运算符进行分组?,linq,lucene,ravendb,Linq,Lucene,Ravendb,对于RavenDB中的过滤产品,我使用产品过滤器的通用列表,以避免长时间切换 product filter类看起来像: public class ProductFilter { public string FilterName { get; set; } public List<string> FilterValues { get; set; } public ProductFilter() { FilterValues = new
public class ProductFilter
{
public string FilterName { get; set; }
public List<string> FilterValues { get; set; }
public ProductFilter()
{
FilterValues = new List<string>();
}
}
使用普通Linq查询时,我无法按字符串名称检索索引属性,因此我尝试使用LuceneQuery执行此操作,如下所示:
public IDocumentQuery<Product> GetProductsBySelectedFilters(string category, List<ProductFilter> productFilters)
{
IDocumentQuery<Product> products;
using (var session = DocumentStore.OpenSession())
{
products = session.Advanced.LuceneQuery<Product>("CategoryProducts/Index", isMapReduce: true)
.WhereStartsWith("Category", category);
foreach (var filter in productFilters)
{
products.UsingDefaultOperator(QueryOperator.And);
foreach (var value in filter.FilterValues)
{
products.WhereEquals(filter.FilterName, value);
products.UsingDefaultOperator(QueryOperator.Or);
}
}
}
return products;
}
那不是我所期望的
有人知道如何处理这个问题吗?使用LuceneQuery的.openSubcuse()和.closeSubcuse()使用LuceneQuery的.openSubcuse()和.closeSubcuse()作为回答。现在我知道了:
Category:parent\u Category(Category:sub\u Category\u 1 Category:sub\u Category\u 2)(Brand:brand1 Brand:brand2)
!您可以使用.Or和.ANDALSOTANK u来添加.AndAlso
完成了这项工作,而不是。使用DefaultOperator(QueryOperator.And)
(此处建议:)thanx作为您的响应。现在我知道了:Category:parent\u Category(Category:sub\u Category\u 1 Category:sub\u Category\u 2)(Brand:brand1 Brand:brand2)
!您可以使用.Or和.ANDALSOTANK u来添加.AndAlso
完成了该工作,而不是。使用DefaultOperator(QueryOperator.And)
(此处建议:)
Category: parent_category AND (Category: sub_category_1 OR Category: sub_category_2 OR ...etc) AND (Brand: brand1 OR Brand:brand2 OR ...etc)
public IDocumentQuery<Product> GetProductsBySelectedFilters(string category, List<ProductFilter> productFilters)
{
IDocumentQuery<Product> products;
using (var session = DocumentStore.OpenSession())
{
products = session.Advanced.LuceneQuery<Product>("CategoryProducts/Index", isMapReduce: true)
.WhereStartsWith("Category", category);
foreach (var filter in productFilters)
{
products.UsingDefaultOperator(QueryOperator.And);
foreach (var value in filter.FilterValues)
{
products.WhereEquals(filter.FilterName, value);
products.UsingDefaultOperator(QueryOperator.Or);
}
}
}
return products;
}
Category: parent_category Category: sub_category_1 Category: sub_category_2 Brand: brand1 Brand: brand2 ...etc