public async Task <Student> GetStudentAsync(string email)
{
Guard.NotNullOrEmpty(email, nameof(email));
var filter = Builders <BsonDocument> .Filter
.Eq(Fields.StudentEmail, email);
var document = await _context.Students
.Find(filter)
.SingleOrDefaultAsync();
if (document == null)
{
return(null);
}
return(new Student(
id: FromBson.GetId(document),
version: FromBson.GetVersion(document),
email: FromBson.GetStudentEmail(document),
name: FromBson.GetStudentName(document),
age: FromBson.GetStudentAge(document)
));
}