SimpleStack.Orm is a layer on top of the wonderful Dapper project that generate SQL queries based on lambda expressions. It is designed to persist types with a minimal amount of intrusion and configuration. All the generated sql queries are using parameters to improve performance and security.
By using Dynamic queries it is also possible to generate queries without a corresponding Type, see Dynamic Queries for more information.
In SimpleStak.Orm : 1 Class = 1 Table/View. There are no surprising or hidden behavior. Attributes may be added on your Type to tune the queries generation (Alias, Schema, PrimaryKey, Index,...)
using SimpleStack.Orm;
using SimpleStack.Orm.SqlServer;
namespace Test{
public class sample{
[Alias("dogs")]
public class Dog{
[PrimaryKey()]
[AutoIncrement()]
public int Id{get; set;}
public string Name{get; set;}
[Alias("birth_date")]
public DateTime? BirthDate{get; set;}
public decimal Weight{get; set;}
public string Breed{get; set;}
}
var factory = new OrmConnectionFactory(new SqlServerDialectProvider(), "server=...");
using (var conn = factory.OpenConnection())
{
conn.CreateTable<Dog>();
// INSERT INTO "dogs" ("Id", "Name", "birth_date", "Weight", "Breed" ) VALUES (@p_0, @p_1, @p_2, @p_3, @p_4)
conn.Insert(new Dog{Name="Snoopy", BirthDate = new DateTime(1950,10,01), Weight=25.4});
conn.Insert(new Dog{Name="Rex", Weight=45.6});
conn.Insert(new Dog{Name="Popol", BirthDate = new DateTime(1918,09,13), Weight=2});
// SELECT "Id", "Name", "birth_date" AS BirthDate, "Weight", "Breed"
// FROM "dogs"
// WHERE ("Id" = @p_0)
// ORDER BY 1 -- ORDER BY is mandatory to use OFFSET and FETCH clause in SQLServer
// OFFSET 0 ROWS FETCH NEXT 1 ROWS ONLY
var rex = conn.First<Dog>(x => Id == 2);
rex.BirthDate = new DateTime(1994,11,10);
// UPDATE "dogs" SET "Name"=@p_0, "birth_date"=@p_1, "Weight"=@p_2, "Breed"=@p_3 WHERE "Id"=@p_4
conn.Update(rex);
// DELETE FROM "dogs" WHERE ("Name" = @p_0)
conn.DeleteAll<Dog>(x => x.Name == "Popol");
// SELECT "Name", "Breed", "Weight"
// FROM "dogsbackup"
// WHERE (DATEPART(year,"birth_date") = @p_0) --will be specific depending on database
// ORDER BY "Breed" ASC,"Weight" DESC
conn.Select<Dog>(x => {
x.From("dogsbackup"); // Change From clause
x.Select(y => new {y.Name,y.Breed,y.Weight}); // Only return some fields
x.Where(y => y.BirthDate.Value.Year == 2019);
x.OrderBy(y => y.Breed)
.ThenByDescending(y => y.Weight);
});
// SELECT AVG(Weight) AS Weight
// FROM "dogs"
conn.GetScalar<Dog, decimal>(x => Sql.Avg(x.Weight))
}
}
}
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