Linq query leading to invalid column name SqlException - sql

Question

ASPNET MVC5 web app, Visual Studio 2015
The website is language localized, so I need to get localized Categories depending on culture parameter.
The category_trans table accounts for providing category name translations while the ISO_Languages accounts for receiving a culture code parameter and passing its relating id the category_trans.
Models:
public partial class Product
{
public int? ID { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public int CategoryID { get; set; }
public virtual category_trans category_trans { get; set; }
}
public partial class Category
{
public int ID { get; set; }
public string Name { get; set; }
public int? ParentID { get; set; }
public bool IsDeleted { get; set; }
}
public class category_trans
{
[Key]
[Column(Order = 1)]
public int category_id { get; set; }
[Key]
[Column(Order = 2)]
public int language_id { get; set; }
public string name { get; set; }
}
public class ISO_Languages
{
public int ID { get; set; }
public string code { get; set; }
public bool IsEnabled { get; set; }
public string name_en { get; set; }
public string name_fr { get; set; }
public string name_it { get; set; }
public string name_de { get; set; }
public string name_es { get; set; }
}
public static IQueryable<Product> ActiveProductsPerUser(BaseContext db, string userid, string culture)
{
return from p in db.Products
from ct in db.category_trans
from l in db.ISO_Languages
where (ct.category_id == p.CategoryID
&& ct.language_id == l.ID
&& l.code.Substring(0, 2) == culture)
select p;
}
results in an error:
System.Data.SqlClient.SqlException: Invalid column name 'category_trans_category_id'. Invalid column name 'category_trans_language_id'. in System.Data.SqlClient.SqlCommand.<>c.b__174_0(Task1 result)
in System.Threading.Tasks.ContinuationResultTaskFromResultTask2.InnerInvoke()
in System.Threading.Tasks.Task.Execute()
Please also note I am passing the expected result to another method for sorting and paging, thus accepting an IQueryable as input (no IEnumerable).

Answer 1

try this;
public static IQueryable<Product> ActiveProductsPerUser(BaseContext db, string userid, string culture)
{
var query = (from p in db.Products
join ct in db.category_trans
on p.CategoryID equals ct.category_id
join l in db.ISO_Languages
on ct.language_id equals l.ID
where l.code.Substring(0, 2) == culture)
select p).ToList();
return query;
}