SQLite.net do an insert with Foreign key - sqlite

Question

What is the best solution to save correctly my database :
I want to save this datas in my sqlite databse and export it in CSV, i made a little method, but with this process i can't get the PhotoEnt in my EmailEntity.
PhotoEntity :
public class PhotoEntity : EntityBase
{
[PrimaryKey, AutoIncrement]
public override int Id { get; set; }
public string IdGuid { get; set; }
public string PhotoDate { get; set; }
public string Image { get; set; }
[OneToMany]
public List<EmailEntity> Emails { get; set; }
}
EmailEntity :
public class EmailEntity : EntityBase
{
[PrimaryKey, AutoIncrement]
public override int Id { get; set; }
[ForeignKey(typeof (PhotoEntity))]
public string IdGuid { get; set; }
public string Email { get; set; }
[ManyToOne]
public PhotoEntity PhotoEnt { get; set; }
}
And, when i saved, i do this :
private void DoInsertBddCommand()
{
var guidForId = Guid.NewGuid().ToString();
var dateTime = DateTime.Now.ToString();
var photoEntity = new PhotoEntity
{
IdGuid = guidForId,
Image = _imageName,
PhotoDate = dateTime
};
new PhotoBusiness().Save(photoEntity);
foreach (var item in Emails)
{
var emailEntity = new EmailEntity
{
IdGuid = guidForId,
Email = item,
PhotoEnt = photoEntity
};
new EmailBusiness().Save(emailEntity);
}
}
It's my first time with SQLite.net, any suggestion ?
Thank you

Answer 1

Okay, so here is how I would setup your models:
public class PhotoEntity : EntityBase
{
[PrimaryKey, AutoIncrement]
public override int Id { get; set; }
public string PhotoDate { get; set; }
public string Image { get; set; }
[OneToMany(CascadeOperations = CascadeOperation.All)]
public List<EmailEntity> Emails { get; set; }
}
public class EmailEntity : EntityBase
{
[PrimaryKey, AutoIncrement]
public override int Id { get; set; }
[ForeignKey(typeof (PhotoEntity))]
public int PhotoEntityId { get; set; }
public string Email { get; set; }
[ManyToOne(CascadeOperations = CascadeOperation.All)]
public PhotoEntity PhotoEnt { get; set; }
}
Notice that I define the cascade operations in the relationship attribtues. This is directly from the SQLite-Extensions docs: https://bitbucket.org/twincoders/sqlite-net-extensions#markdown-header-cascade-operations
Now when you save/retrieve objects you need to use the recursive methods:
GetWithChildren
InsertWithChildren
https://bitbucket.org/twincoders/sqlite-net-extensions#markdown-header-cascade-read