public static IServiceCollection InjectDBContext <TDBContext>(this IServiceCollection services, IConfiguration configuration)
where TDBContext : DbContext
{
KRFDatabases dbSettings = configuration.GetSection(KRFApiSettings.KRFDatabases_Key).Get <KRFDatabases>() ?? null;
return(services.InjectDBContext <TDBContext>(dbSettings));
}
public static IServiceCollection InjectDBContext <TDBContext>(this IServiceCollection services, KRFDatabases dbSettings)
where TDBContext : DbContext
{
if (dbSettings == null || dbSettings.Databases == null)
{
throw new Exception("Missing database settings");
}
KRFDatabaseConfig settings = null;
var contextName = typeof(TDBContext).Name;
if (!dbSettings.Databases.TryGetValue(contextName, out settings))
{
throw new Exception(string.Format("Missing settings for {0}", contextName));
}
if (settings == null || string.IsNullOrEmpty(settings.ConnectionString))
{
throw new Exception("Missing connection string or database settings");
}
var connectionString = settings.ConnectionString;
if (settings.UseLocalDB.HasValue || !string.IsNullOrEmpty(settings.ApiDBFolder))
{
var builder = new SqlConnectionStringBuilder(settings.ConnectionString);
var currentPath = builder.AttachDBFilename;
//validate settings
if (string.IsNullOrEmpty(currentPath))
{
throw new Exception("Missing AttachDBFilename relative path to db file .mdf on connection string");
}
if (!currentPath.EndsWith(".mdf"))
{
throw new Exception("Wrong file type selected on AttachDBFilename path. use .mdf extension");
}
if (Path.IsPathRooted(currentPath))
{
throw new Exception("Path selected to AttachDBFilename is not a relative path");
}
if (settings.UseLocalDB.HasValue && settings.UseLocalDB.Value)
{
//add Startup Project location to connection string relative path
builder.AttachDBFilename = string.Format("{0}\\{1}", Environment.CurrentDirectory, currentPath);
}
else if (!string.IsNullOrEmpty(settings.ApiDBFolder))
{
//add apiDB path to connection string relative path
if (!Path.IsPathRooted(settings.ApiDBFolder))
{
throw new Exception("Path selected to ApiDBFolder setting is not a valid absolute path");
}
builder.AttachDBFilename = string.Format("{0}\\{1}", settings.ApiDBFolder, currentPath);
}
connectionString = builder.ConnectionString;
}
services.AddDbContext <TDBContext>(opt =>
{
opt.UseSqlServer(connectionString, x =>
{
if (!string.IsNullOrEmpty(dbSettings.MigrationAssembly))
{
x.MigrationsAssembly(dbSettings.MigrationAssembly);
}
});
});
return(services);
}