MVVMCross Community SqLite - Relationship between tables - sqlite

Question

I have two simple tables as follow:
public class MediaPartner
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
public string PhoneNumber { get; set; }
public string CompanyName { get; set; }
public double Lat { get; set; }
public double Lng { get; set; }
public DateTime InsertedUtc { get; set; }
}
public class ImageGroup
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
public List<MediaPartner> IdMediaPartner { get; set; }
public string ImagePath { get; set; }
public bool IsSent { get; set; }
public DateTime InsertedUtc { get; set; }
}
The problem:
public List< MediaPartner > IdMediaPartner { get; set; }
OR
public MediaPartner IdMediaPartner { get; set; }
does not compile.
My question is: Is there a way to build one-to-many relationship between these two tables?
Thank you!

Answer 1

SQLite-net only provides cross-table referencing using indexing like:
public class Stock
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
[MaxLength(8)]
public string Symbol { get; set; }
}
public class Valuation
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
[Indexed]
public int StockId { get; set; }
public DateTime Time { get; set; }
public decimal Price { get; set; }
}
There is at least one extension to sqlite-net which allows OneToMany attributes to be declared - see https://bitbucket.org/twincoders/sqlite-net-extensions which enables code like:
public class Stock
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
[MaxLength(8)]
public string Symbol { get; set; }
[OneToMany] // One to many relationship with Valuation
public List<Valuation> Valuations { get; set; }
}
public class Valuation
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
[ForeignKey(typeof(Stock))] // Specify the foreign key
public int StockId { get; set; }
public DateTime Time { get; set; }
public decimal Price { get; set; }
[ManyToOne] // Many to one relationship with Stock
public Stock Stock { get; set; }
}
I'm not sure of the exact implementation of this - e.g. I don't know if this uses real FOREIGN KEY constraints - but the code is open source, is under active development, has mvvmcross plugin support built-in, is cross platform and is available for forking and for contributions.