Add filter to all query entity framework

Question

I want add CompanyID filter to my all entity framework request.Because each user must see just their records.I dont want add filter (x=>x.CompanyID == cID) all methods in bu

Answer 1

You can implement IHasCompanyId interface in such entities. And then implement repository pattern as:

public class MyRepository
{
    public MyRepository(DbContext dbContext, int companyID)
    {
        if (dbContext == null) 
            throw new ArgumentNullException("Null DbContext");
        DbContext = dbContext;
        DbSet = DbContext.Set();

        CompanyID = companyID;
    }

    protected DbContext DbContext { get; set; }
    protected int CompanyID  { get; set; }

    protected DbSet DbSet { get; set; }

    // Add filter here
    public virtual IQueryable GetAll()
    {
        if(typeof(IHasCompanyID).IsAssignableFrom(typeof(T)))
            return DbSet.Where(x => x.CompanyID == CompanyID);
        else 
            return DbSet;
    }
}

And initialize _financeDal as:

var _financeDal = new MyRepository(dbContext, companyID);