Allow Filters on different sources to share the same name

Allows Posts and Comments to both use the IsNew filter with their own implementations.

SieveUnitTests/Entities/Comment.cs

@@ -1,9 +1,15 @@
-namespace SieveUnitTests.Entities
+using System;
+using Sieve.Attributes;
+
+namespace SieveUnitTests.Entities
 {
 	public class Comment
     {
         public int Id { get; set; }
 
+        [Sieve(CanFilter = true, CanSort = true)]
+        public DateTimeOffset DateCreated { get; set; } = DateTimeOffset.UtcNow;
+
         public string Text { get; set; }
     }
 }

SieveUnitTests/General.cs

@@ -15,6 +15,7 @@ namespace SieveUnitTests
     {
         private readonly SieveProcessor _processor;
         private readonly IQueryable<Post> _posts;
+        private readonly IQueryable<Comment> _comments;
 
         public General()
         {
@@ -52,6 +53,25 @@ namespace SieveUnitTests
                     CategoryId = 2,
                 },
             }.AsQueryable();
+
+            _comments = new List<Comment>
+            {
+                new Comment() {
+                    Id = 0,
+                    DateCreated = DateTimeOffset.UtcNow.AddDays(-20),
+                    Text = "This is an old comment."
+                },
+                new Comment() {
+                    Id = 1,
+                    DateCreated = DateTimeOffset.UtcNow.AddDays(-1),
+                    Text = "This is a fairly new comment."
+                },
+                new Comment() {
+                    Id = 2,
+                    DateCreated = DateTimeOffset.UtcNow,
+                    Text = "This is a brand new comment."
+                },
+            }.AsQueryable();
         }
 
         [TestMethod]
@@ -180,6 +200,30 @@ namespace SieveUnitTests
             Assert.IsTrue(result.Count() == 1);
         }
 
+        [TestMethod]
+        public void CustomFiltersOnDifferentSourcesCanShareName()
+        {
+            var postModel = new SieveModel()
+            {
+                Filters = "CategoryId==2,Isnew",
+            };
+
+            var postResult = _processor.Apply(postModel, _posts);
+
+            Assert.IsTrue(postResult.Any(p => p.Id == 3));
+            Assert.AreEqual(1, postResult.Count());
+
+            var commentModel = new SieveModel()
+            {
+                Filters = "Isnew",
+            };
+
+            var commentResult = _processor.Apply(commentModel, _comments);
+
+            Assert.IsTrue(commentResult.Any(c => c.Id == 2));
+            Assert.AreEqual(2, commentResult.Count());
+        }
+
         [TestMethod]
         public void MethodNotFoundExceptionWork()
         {

SieveUnitTests/Services/SieveCustomFilterMethods.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using Sieve.Services;
 using SieveUnitTests.Entities;
 
@@ -13,6 +14,13 @@ namespace SieveUnitTests.Services
             return result;
         }
 
+        public IQueryable<Comment> IsNew(IQueryable<Comment> source, string op, string value)
+        {
+            var result = source.Where(c => c.DateCreated > DateTimeOffset.UtcNow.AddDays(-2));
+
+            return result;
+        }
+
         public IQueryable<Comment> TestComment(IQueryable<Comment> source, string op, string value)
         {
             return source;