OrderByDynamic is modified to be able to handle inherited members, such as interface members.

SieveProcessor is modified to pass propertyInfo to OrderByDynamic to avoid reattainment of propertyInfo required in Expression.MakeMemberAccess.
SieveProcessor is modified to be able to handle possible multiple incompatible customMethods via AggregateException.
Corresponding interfaces are generated for entities with related inheritance.
ApplicationSieveProcessor is modified to include interface members.
SieveCustomFilterMethods and SieveCustomSortMethod are modified to include interface related custom method modifications.
Interface accessed unit tests are added.

SieveUnitTests/Services/ApplicationSieveProcessor.cs

@@ -1,6 +1,7 @@
 using Microsoft.Extensions.Options;
 using Sieve.Models;
 using Sieve.Services;
+using SieveUnitTests.Abstractions.Entity;
 using SieveUnitTests.Entities;
 
 namespace SieveUnitTests.Services
@@ -39,6 +40,39 @@ namespace SieveUnitTests.Services
                 .CanFilter()
                 .HasName("featc");
 
+            mapper
+                .Property<Post>(p => p.DateCreated)
+                .CanSort()
+                .HasName("CreateDate");
+
+            // interfaces
+            mapper.Property<IPost>(p => p.ThisHasNoAttributeButIsAccessible)
+                .CanSort()
+                .CanFilter()
+                .HasName("shortname");
+
+            mapper.Property<IPost>(p => p.TopComment.Text)
+                .CanFilter();
+
+            mapper.Property<IPost>(p => p.TopComment.Id)
+                .CanSort();
+
+            mapper.Property<IPost>(p => p.OnlySortableViaFluentApi)
+                .CanSort();
+
+            mapper.Property<IPost>(p => p.TopComment.Text)
+                .CanFilter()
+                .HasName("topc");
+
+            mapper.Property<IPost>(p => p.FeaturedComment.Text)
+                .CanFilter()
+                .HasName("featc");
+
+            mapper
+                .Property<IPost>(p => p.DateCreated)
+                .CanSort()
+                .HasName("CreateDate");
+
             return mapper;
         }
     }

SieveUnitTests/Services/SieveCustomFilterMethods.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using Sieve.Services;
+using SieveUnitTests.Abstractions.Entity;
 using SieveUnitTests.Entities;
 
 namespace SieveUnitTests.Services
@@ -38,5 +39,31 @@ namespace SieveUnitTests.Services
             var result = source.Where(c => c.DateCreated > DateTimeOffset.UtcNow.AddDays(-14));
             return result;
         }
+
+        public IQueryable<IPost> IsNew(IQueryable<IPost> source, string op, string[] values)
+        {
+            var result = source.Where(p => p.LikeCount < 100);
+
+            return result;
+        }
+
+        public IQueryable<IPost> HasInTitle(IQueryable<IPost> source, string op, string[] values)
+        {
+            var result = source.Where(p => p.Title.Contains(values[0]));
+
+            return result;
+        }
+
+        public IQueryable<IComment> IsNew(IQueryable<IComment> source, string op, string[] values)
+        {
+            var result = source.Where(c => c.DateCreated > DateTimeOffset.UtcNow.AddDays(-2));
+
+            return result;
+        }
+
+        public IQueryable<IComment> TestComment(IQueryable<IComment> source, string op, string[] values)
+        {
+            return source;
+        }
     }
 }

SieveUnitTests/Services/SieveCustomSortMethods.cs

@@ -1,5 +1,6 @@
 using System.Linq;
 using Sieve.Services;
+using SieveUnitTests.Abstractions.Entity;
 using SieveUnitTests.Entities;
 
 namespace SieveUnitTests.Services
@@ -17,7 +18,18 @@ namespace SieveUnitTests.Services
             return result;
         }
 
-        public IQueryable<T> Oldest<T>(IQueryable<T> source, bool useThenBy, bool desc) where T : BaseEntity
+        public IQueryable<IPost> Popularity(IQueryable<IPost> source, bool useThenBy, bool desc)
+        {
+            var result = useThenBy ?
+                ((IOrderedQueryable<IPost>)source).ThenBy(p => p.LikeCount) :
+                source.OrderBy(p => p.LikeCount)
+                    .ThenBy(p => p.CommentCount)
+                    .ThenBy(p => p.DateCreated);
+
+            return result;
+        }
+
+        public IQueryable<T> Oldest<T>(IQueryable<T> source, bool useThenBy, bool desc) where T : IBaseEntity
         {
             var result = useThenBy ?
                 ((IOrderedQueryable<T>)source).ThenByDescending(p => p.DateCreated) :

SieveUnitTests/Services/SieveOptionsAccessor.cs

@@ -1,7 +1,7 @@
 using Microsoft.Extensions.Options;
 using Sieve.Models;
 
-namespace SieveUnitTests
+namespace SieveUnitTests.Services
 {
     public class SieveOptionsAccessor : IOptions<SieveOptions>
     {