Update Existing Values Examples

data.cs

using System.Collections.Generic;
using System.Data;
using ServiceStack;
using ServiceStack.OrmLite;
using ServiceStack.DataAnnotations;

public class Artist
{
    public int Id { get; set; }
    public string Name { get; set; }
    
    [Reference]
    public List<Track> Tracks { get; set; }
    public override string ToString() => Name;
}

public class Track
{
    [AutoIncrement]
    public int Id { get; set; }
    public string Name { get; set; }
    public int ArtistId { get; set; }
    public string Album { get; set; }
    public int Year { get; set; }
    public override string ToString() => Name;
}

var Artists = new [] {
    new Artist { 
        Id = 1, Name = "Faith No More", 
        Tracks = new List<Track> { 
            new Track { Name = "Everythings Ruined", Album = "Angel Dust", Year = 1992 },
            new Track { Name = "Ashes to Ashes", Album = "Album of the Year", Year = 1997 },
        }
    },
    new Artist { 
        Id = 2, Name = "Live", 
        Tracks = new List<Track> { 
            new Track { Name = "Lightning Crashes", Album = "Throwing Copper", Year = 1994 },
            new Track { Name = "Lakini's Juice", Album = "Secret Samadhi", Year = 1997 },
        }
    },
    new Artist { 
        Id = 3, Name = "Nirvana", 
        Tracks = new List<Track> { 
            new Track { Name = "Smells Like Teen Spirit", Album = "Nevermind", Year = 1991  },
            new Track { Name = "Heart-Shaped Box", Album = "In Utero", Year = 1993 },
        }
    },
    new Artist { 
        Id = 4, Name = "Pearl Jam", 
        Tracks = new List<Track> { 
            new Track { Name = "Alive", Album = "Ten", Year = 1991 },
            new Track { Name = "Daughter", Album = "Vs", Year = 1993 },
        }
    },
};

IDbConnection CreateArtistAndTrackTablesWithData(IDbConnection db)
{
    db.DropAndCreateTable<Artist>();
    db.DropAndCreateTable<Track>();
    Artists.Each(x => db.Save(x, references:true));
    return db;
}

main.cs

using System;
using System.Linq;
using ServiceStack;
using ServiceStack.Text;
using ServiceStack.OrmLite;
using ServiceStack.OrmLite.Sqlite;
using ServiceStack.DataAnnotations;

var dbFactory = new OrmLiteConnectionFactory(":memory:", SqliteDialect.Provider);
var db = CreateArtistAndTrackTablesWithData(dbFactory.Open());

//Increase all Track Years by 1 using lambda expression
db.UpdateAdd(() => new Track { Year = 1 }); 
var incrementedYears = db.Select<Track>().OrderBy(x => x.Year).Take(3).ToList();
$"Increased all Track Years by +1: {incrementedYears.Dump()}".Print();

//Decreasing all Track Years by -1 using specific field
db.UpdateAdd(() => new Track { Year = -1 }); 
var decrementedYears = db.Select<Track>().OrderBy(x => x.Year).Take(3).ToList();
$"Decreased all Track Years by -1: {decrementedYears.Dump()}".Print();

//UpdateAdd on non-numeric fields are updated normally:
db.UpdateAdd(() => new Track { Year = -10, Album = "Lost a decade" }, x => x.Year == 1997); 
var updatedIntAndString = db.Select<Track>().OrderBy(x => x.Year).Take(2).ToList();
$"Updated existing Year Value and Name: {updatedIntAndString.Dump()}".Print();

//Add 10 years to all 1991 Tracks
var q = db.From<Track>()
    .Where(x => x.Year == 1991);
db.UpdateAdd(() => new Track { Year = 10 }, q);

var tracks2001 = db.Select<Track>(x => x.Year == 2001);
$"Tracks updated to 2001: {tracks2001.Dump()}".Print();

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="System.Memory" version="4.5.4" targetFramework="net45" />
  <package id="ServiceStack.Text" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Client" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Common" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.Interfaces" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.OrmLite" version="5.10.0" targetFramework="net45" />
  <package id="ServiceStack.OrmLite.Sqlite.Windows" version="5.10.0" targetFramework="net45" />
</packages>