public Athlete[] FindByPosition(string position)
{
using (var db = new Context())
{
return db.Set<Athlete>().Where(athlete => athlete.Position.Equals(position, StringComparison.OrdinalIgnoreCase)).ToArray();
}
}
public Athlete FindAthlete(long athleteId)
{
using (var db = new Context())
{
return db.Set<Athlete>().Find(athleteId);
}
}
public Athlete SaveAthlete(Athlete athlete)
{
using (var db = new Context())
{
db.Entry(athlete).State = athlete.Id == 0 ? EntityState.Added : EntityState.Modified;
db.SaveChanges();
}
return athlete;
}
public void Seed()
{
using (var db = new Context())
{
if (db.Set<Athlete>().Count() == 0)
{
SeedTeams();
SeedAthletes();
}
}
}
public TeamAthletes FindTeamWithAthletes(long teamId)
{
using (var db = new Context())
{
var team = db.Set<Team>().Find(teamId);
var teamathletes = (
from athletes in db.Set<Athlete>()
join at in db.Set<AthleteTeam>() on athletes.Id equals at.AthleteId
where at.TeamId == teamId
select athletes
).ToArray();
return new TeamAthletes
{
Team = team,
Athletes = teamathletes,
};
}
}
private void SeedAthletes()
{
var footballPositions = new string[] { "Quarter Back", "Wide Receiver", "Safety", "Punter" };
var baseballPositions = new string[] { "First Base", "Right Field", "Catcher", "Pitcher" };
var soccerPositons = new string[] { "Forward", "Midfield", "Defense", "Keeper" };
Athlete athlete;
using (var db = new Context())
{
List<Athlete> footballAthletes = new List<Athlete>();
for (int x = 0; x < 1000; x++)
{
athlete = new Athlete
{
FirstName = Guid.NewGuid().ToString(),
LastName = Guid.NewGuid().ToString(),
Position = footballPositions[x % footballPositions.Length]
};
footballAthletes.Add(db.Athletes.Add(athlete));
}
db.SaveChanges();
var athleteIds = footballAthletes.Select(ath => ath.Id);
var teamId = Teams.First(team => team.Name == "Football").Id;
foreach (var id in athleteIds)
{
db.AthleteTeam.Add(new AthleteTeam
{
TeamId = teamId,
AthleteId = id,
});
}
db.SaveChanges();
var baseballAthletes = new List<Athlete>();
for (int x = 0; x < 1000; x++)
{
athlete = new Athlete
{
FirstName = Guid.NewGuid().ToString(),
LastName = Guid.NewGuid().ToString(),
Position = baseballPositions[x % baseballPositions.Length]
};
baseballAthletes.Add(db.Athletes.Add(athlete));
}
db.SaveChanges();
athleteIds = footballAthletes.Select(ath => ath.Id);
teamId = Teams.First(team => team.Name == "Baseball").Id;
foreach (var id in athleteIds)
{
db.AthleteTeam.Add(new AthleteTeam
{
TeamId = teamId,
AthleteId = id,
});
}
db.SaveChanges();
var soccerAthletes = new List<Athlete>();
for (int x = 0; x < 1000; x++)
{
athlete = new Athlete
{
FirstName = Guid.NewGuid().ToString(),
LastName = Guid.NewGuid().ToString(),
Position = soccerPositons[x % baseballPositions.Length]
};
soccerAthletes.Add(db.Athletes.Add(athlete));
}
db.SaveChanges();
athleteIds = footballAthletes.Select(ath => ath.Id);
teamId = Teams.First(team => team.Name == "Soccer").Id;
foreach (var id in athleteIds)
{
db.AthleteTeam.Add(new AthleteTeam
{
TeamId = teamId,
AthleteId = id,
});
}
db.SaveChanges();
}
}
private void SeedTeams()
{
var teams = new Team[]
{
new Team
{
Name = "Football"
},
new Team
{
Name= "Baseball"
},
new Team
{
Name = "Soccer"
}
};
using (var db = new Context())
{
foreach (var team in teams)
{
Teams.Add(db.Set<Team>().Add(team));
db.SaveChanges();
}
}
}
private static void LoadTeamWithAthletes()
{
var sw = new Stopwatch();
var ef = new EFAccessor();
var dapper = new DapperAccessor();
long[] teamIds;
using (var db = new Context())
{
teamIds = db.Set<Team>().Select(team => team.Id).ToArray();
}
sw.Start();
ef.FindTeamWithAthletes(teamIds[0]);
sw.Stop();
Console.WriteLine("EF find Team with Athletes first: {0}", sw.ElapsedMilliseconds);
sw.Restart();
ef.FindTeamWithAthletes(teamIds[1]);
sw.Stop();
Console.WriteLine("EF find Team with Athletes second: {0}", sw.ElapsedMilliseconds);
sw.Restart();
dapper.FindTeamWithAthletes(teamIds[2]);
sw.Stop();
Console.WriteLine("Dapper find Team with Athletes first: {0}", sw.ElapsedMilliseconds);
sw.Restart();
dapper.FindTeamWithAthletes(teamIds[0]);
sw.Stop();
Console.WriteLine("Dapper find Team with Athletes second: {0}", sw.ElapsedMilliseconds);
}
