public static MusicContext SeedIfEmpty(this MusicContext db)
{
//AssertDatabase(db);
Delete(db);
//if (db.Artists.Any()) return db;
//Console.WriteLine("Db is not Empty");
Seed(db);
db.SaveChanges();
return(db);
}
public static void Seed(MusicContext db)
{
string[] csv_file = GetFile();
for (int i = 1; i < csv_file.Length; i++)
{
string line = csv_file[i];
string[] parts = line.Split(';');
string recordType = parts[2];
string artistName = parts[0];
string recordTitle = parts[1];
string year = parts[3];
string songTitle = parts[4];
var recordTypeA = db.RecordTypes.Where(x => x.Descr.Equals(recordType)).FirstOrDefault();
if (recordTypeA == null)
{
recordTypeA = new RecordType {
Descr = recordType
};
db.RecordTypes.Add(recordTypeA);
db.SaveChanges();
}
var artistA = db.Artists.Where(x => x.ArtistName.Equals(artistName)).FirstOrDefault();
if (artistA == null)
{
artistA = new Artist {
ArtistName = artistName
};
db.Artists.Add(artistA);
db.SaveChanges();
}
var recordA = db.Records.Where(x => x.RecordTitle.Equals(recordTitle)).FirstOrDefault();
if (recordA == null)
{
recordA = new Record {
RecordTitle = recordTitle, Year = year, Artist = artistA, RecordType = recordTypeA
};
db.Records.Add(recordA);
db.SaveChanges();
}
var songA = db.Songs.Where(x => x.SongTitle.Equals(songTitle)).FirstOrDefault();
if (songA == null)
{
songA = new Song {
SongTitle = songTitle, Record = recordA
};
db.Songs.Add(songA);
db.SaveChanges();
}
}
}
private static void AssertDatabase(MusicContext db)
{
if (db.Database.Exists())
{
if (db.Database.CompatibleWithModel(true))
{
return;
}
db.Database.Delete();
}
db.Database.Create();
}
private static void Delete(MusicContext db)
{
db.Database.Delete();
db.Database.Create();
}
