我们如何让servicestack的ormlite生成执行WHERE子句的SQL,如下所示:
WHERE FirstName like '%joe%' OR lastname like '%joe%'
目前,如果我这样做:
db.Select<Person>.Where(x=> x.LastName.Contains(searchstring) || x.FirstName.Contains(searchstring));
它将生成一个WHERE子句,如下所示,没有所需的通配符:
WHERE FirstName like 'joe' OR lastname like 'joe'
答案 0 :(得分:3)
String包含OrmLite中的表达式按预期工作,如此Live example on Gistlyn中所示,它使用最新版本的OrmLite:
LogManager.LogFactory = new ConsoleLogFactory();
public class Person
{
[AutoIncrement]
public long Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
db.CreateTable<Person>();
db.Insert(new Person { FirstName = "Joeseph", LastName = "Smith" });
var rows = db.Select<Person>(x =>
x.FirstName.Contains("joe") || x.LastName.Contains("joe"));
返回有效匹配项,并将执行的查询记录到控制台:
DEBUG: SQL: CREATE TABLE "Person"
(
"Id" INTEGER PRIMARY KEY AUTOINCREMENT,
"FirstName" VARCHAR(8000) NULL,
"LastName" VARCHAR(8000) NULL
);
DEBUG: SQL: INSERT INTO "Person" ("FirstName","LastName") VALUES (@FirstName,@LastName)
PARAMS: @FirstName=Joeseph, @LastName=Smith
DEBUG: SQL: SELECT "Id", "FirstName", "LastName"
FROM "Person"
WHERE (upper("FirstName") like @0 OR upper("LastName") like @1)
PARAMS: @0=%JOE%, @1=%JOE%
OrmLite一直在使用参数化查询,因此您必须使用旧版本的OrmLite,如果升级到OrmLite的最新 v4.5.0 ,它应该按预期工作。