EF Core: Soft delete with shadow properties and query filters

Question

I\'ve created an interface to try to do a soft delete, mixing shadow properties and query filters. But it\'s not working.

public interface IDeletableEntity {         


        

Answer 1

What I did was

builder.Model.GetEntityTypes()
           .Where(p => typeof(IDeletableEntity).IsAssignableFrom(p.ClrType))
           .ToList()
            .ForEach(entityType =>
            {
                builder.Entity(entityType.ClrType)
                .HasQueryFilter(ConvertFilterExpression(e => !e.IsDeleted, entityType.ClrType));
            });

and

 private static LambdaExpression ConvertFilterExpression(
                Expression> filterExpression,
                Type entityType)
    {
        var newParam = Expression.Parameter(entityType);
        var newBody = ReplacingExpressionVisitor.Replace(filterExpression.Parameters.Single(), newParam, filterExpression.Body);

        return Expression.Lambda(newBody, newParam);
    }