Created
December 3, 2018 07:20
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OrmLite Self Join
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using ServiceStack; | |
using ServiceStack.Text; | |
using ServiceStack.OrmLite; | |
using ServiceStack.OrmLite.Sqlite; | |
using ServiceStack.DataAnnotations; | |
var dbFactory = new OrmLiteConnectionFactory(":memory:", SqliteDialect.Provider); | |
var db = dbFactory.Open(); // Open ADO.NET DB Connection | |
public class User | |
{ | |
[AutoIncrement] | |
public int Id { get; set; } | |
public string Name { get; set; } | |
[References(typeof(User))] | |
public int SupervisorId { get; set; } | |
} | |
db.CreateTable<User>(); | |
var super = new User { | |
Id = 1, | |
Name = "Sally Super", | |
}; | |
db.Save(super); | |
var foreman = new User { | |
Id = 2, | |
Name = "Joe Foreman", | |
SupervisorId = super.Id | |
}; | |
db.Save(foreman); | |
public class TimeSheet | |
{ | |
[AutoIncrement] | |
public int Id { get; set; } | |
[References(typeof(User))] | |
public int ForemanId { get; set; } | |
} | |
db.CreateTable<TimeSheet>(); | |
var ts1 = new TimeSheet { | |
ForemanId = foreman.Id | |
}; | |
db.Save(ts1); | |
/* | |
var savedSuper = db.SingleById<User>(super.Id); | |
"Saved super: {0}".Print(savedSuper.Dump()); | |
var savedForeman = db.SingleById<User>(foreman.Id); | |
"Saved foreman: {0}".Print(savedForeman.Dump()); | |
var savedts = db.SingleById<TimeSheet>(ts1.Id); | |
"Saved timesheet: {0}".Print(savedts.Dump()); | |
var query = db.From<TimeSheet>() | |
.Join<User>() | |
.Join<User, User>(); | |
*/ | |
var query = db.From<User>() | |
.Join<User>((foreman, super) => foreman.SupervisorId == super.Id) | |
.Where(u => u.Id == 2); | |
var results = db.Select(query); | |
"Results: {0}".Print(results.Dump()); | |
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<?xml version="1.0" encoding="utf-8"?> | |
<packages> | |
<package id="ServiceStack.Text" version="5.2.0" targetFramework="net45" /> | |
<package id="ServiceStack.Interfaces" version="5.2.0" targetFramework="net45" /> | |
<package id="ServiceStack.Common" version="5.2.0" targetFramework="net45" /> | |
<package id="ServiceStack.OrmLite" version="5.2.0" targetFramework="net45" /> | |
<package id="ServiceStack.OrmLite.Sqlite.Windows" version="5.2.0" targetFramework="net45" /> | |
</packages> |
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