Setting a Default Value for Migrations

I have a relationship between two models but the relationship is not required, i.e. the first model which "belongs to" the other model can exists on its own.

class Item {

  [DefaultValue(0)]
  public int? OwnerId {get;set;}
  
  public Owner Owner { get;set; }
}

class Owner {
  ...
}

class Item {

  [DefaultValue(0)]
  public int? OwnerId {get;set;}
  
  public Owner Owner { get;set; }
}

class Owner {
  ...
}

So in essence, class

Item

Item

can stand on its own but it can also belong to someone.

I am getting this when trying to run the database update command for the seed data which has set the OwnerId to 0

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Items_Owners_OwnerId". The conflict occurred in database "<DB>", table "dbo.Owners", column 'Id'.

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Items_Owners_OwnerId". The conflict occurred in database "<DB>", table "dbo.Owners", column 'Id'.

C#•2y ago•

53 replies

{sus}

Setting a Default Value for Migrations

I have a relationship between two models but the relationship is not required, i.e. the first model which "belongs to" the other model can exists on its own.

class Item {

  [DefaultValue(0)]
  public int? OwnerId {get;set;}
  
  public Owner Owner { get;set; }
}

class Owner {
  ...
}

class Item {

  [DefaultValue(0)]
  public int? OwnerId {get;set;}
  
  public Owner Owner { get;set; }
}

class Owner {
  ...
}

So in essence, class

Item

Item

can stand on its own but it can also belong to someone.

I am getting this when trying to run the database update command for the seed data which has set the OwnerId to 0

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Items_Owners_OwnerId". The conflict occurred in database "<DB>", table "dbo.Owners", column 'Id'.

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Items_Owners_OwnerId". The conflict occurred in database "<DB>", table "dbo.Owners", column 'Id'.

Setting a Default Value for Migrations

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