当在编译时不知道这些术语时,是否建议使用StartsWith搜索多个术语中的每一个?
我设想这样的事情:
var searchTerms = "John Doe".Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var query = session.Query<Person, PersonIndex>()
.Where(x => x.FirstName.StartsWithAnyOf(searchTerms) ||
x.LastName.StartsWithAnyOf(searchTerms));
查询将等同于:
var query = session.Query<Person, PersonIndex>()
.Where(x => x.FirstName.Starts(searchTerms[0]) ||
x.LastName.StartsWith(searchTerms[0]) ||
x.FirstName.Starts(searchTerms[1]) ||
x.LastName.StartsWith(searchTerms[1]));
在运行时(PredicateBuilder或类似的)构建LINQ查询的答案是什么?
答案 0 :(得分:4)
使用LuceneQuery(可能想根据你正在做的其他事情使用子条款):
var searchTerms = "John Doe".Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var query = session.Advanced.LuceneQuery<Person, PersonIndex>();
query = query.OpenSubclause(); // optional
foreach (var term in terms)
{
query = query.WhereStartsWith("FirstName"), term).OrElse();
query = query.WhereStartsWith("LastName"), term).OrElse();
}
query = query.WhereEquals("Id", null);
query = query.CloseSubclause(); // if OpenSubclause() was used
如果您想要强类型变量名,请查看以下答案:https://stackoverflow.com/a/301957/941536
答案 1 :(得分:0)
你想做什么?
您最好使用已分析的字段,然后发出.Search
而不是.Where
。