making a global filter for entity framework

Question

For my models I have a active attribute on all of them, and i want to filter all inactive if the model was not displayed on the administration What is the best

Answer 1

You can create extension methods like

public static IQueryable Where(this IQueryable source, Expression> predicate)
{
    source = source.Where("isActive == true"); // From System.linq.Dynamic Library
    source = Queryable.Where(source, predicate);
    return source;
}

and use them like

var user = db.UserProfiles.Include("webpages_Roles").Where(u => u.UserId < 30);

This should work, Please Let me know if you need more information.

Note : Please Add Nuget package for System.Linq.Dynamic to have dynamic Linq Library

Update 1:

I have included IsActive in webpages_Roles and UsreProfile table of simple membership and also included one more table Role Priority which refers to webpages_Roles, for easy to use I have changed the all the relation ships to one to many(from many to many). now if I use code similar to yours, extension method gives error when there is any user for which there are no roles.

If I give roles to every user and I have priority for every roles then this won't give error.

Please Let me know if you still need any other info.

Update 2

You can create one extension Method like

public static IQueryable WhereActive(this IQueryable source)
        {
            return source.Where("isActive == true"); // From System.linq.Dynamic Library
        }

and call other methods like

var user = db.UserProfiles.Include("webpages_Roles").WhereActive().Where(u => u.UserId < 30);

or

var user = db.UserProfiles.Include("webpages_Roles").WhereActive().FirstOrDefault(u => u.UserId < 30);

Please Let me know if you still need any other info.