Implementing dynamic query operators

--HG--
branch : 1.x

src/Orchard.Tests/ContentManagement/DynamicContentQueryTests.cs

@@ -0,0 +1,233 @@
+using System.Linq;
+using Autofac;
+using Moq;
+using NHibernate;
+using NUnit.Framework;
+using Orchard.ContentManagement.MetaData;
+using Orchard.Data;
+using Orchard.ContentManagement;
+using Orchard.ContentManagement.Handlers;
+using Orchard.ContentManagement.Records;
+using Orchard.DisplayManagement;
+using Orchard.DisplayManagement.Descriptors;
+using Orchard.Environment.Extensions;
+using Orchard.Tests.ContentManagement.Handlers;
+using Orchard.Tests.ContentManagement.Records;
+using Orchard.Tests.ContentManagement.Models;
+using Orchard.DisplayManagement.Implementation;
+using Orchard.Tests.Stubs;
+
+namespace Orchard.Tests.ContentManagement {
+    [TestFixture]
+    public class DynamicContentQueryTests {
+        private IContainer _container;
+        private IContentManager _manager;
+        private ISessionFactory _sessionFactory;
+        private ISession _session;
+
+        [TestFixtureSetUp]
+        public void InitFixture() {
+            var databaseFileName = System.IO.Path.GetTempFileName();
+            _sessionFactory = DataUtility.CreateSessionFactory(
+                databaseFileName,
+                typeof(GammaRecord),
+                typeof(DeltaRecord),
+                typeof(EpsilonRecord),
+                typeof(ContentItemVersionRecord),
+                typeof(ContentItemRecord),
+                typeof(ContentTypeRecord));
+        }
+
+        [SetUp]
+        public void Init() {
+            var builder = new ContainerBuilder();
+
+            builder.RegisterModule(new ContentModule());
+            builder.RegisterType<DefaultContentManager>().As<IContentManager>().SingleInstance();
+            builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
+            builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
+            builder.RegisterInstance(new Mock<IContentDisplay>().Object);
+
+            builder.RegisterType<AlphaPartHandler>().As<IContentHandler>();
+            builder.RegisterType<BetaPartHandler>().As<IContentHandler>();
+            builder.RegisterType<GammaPartHandler>().As<IContentHandler>();
+            builder.RegisterType<DeltaPartHandler>().As<IContentHandler>();
+            builder.RegisterType<EpsilonPartHandler>().As<IContentHandler>();
+            builder.RegisterType<FlavoredPartHandler>().As<IContentHandler>();
+            builder.RegisterType<StyledHandler>().As<IContentHandler>();
+            builder.RegisterType<DefaultShapeTableManager>().As<IShapeTableManager>();
+            builder.RegisterType<ShapeTableLocator>().As<IShapeTableLocator>();
+            builder.RegisterType<DefaultShapeFactory>().As<IShapeFactory>();
+
+            builder.RegisterGeneric(typeof(Repository<>)).As(typeof(IRepository<>));
+
+            builder.RegisterType<StubExtensionManager>().As<IExtensionManager>();
+            builder.RegisterType<DefaultContentDisplay>().As<IContentDisplay>();
+
+            _session = _sessionFactory.OpenSession();
+            builder.RegisterInstance(new DefaultContentManagerTests.TestSessionLocator(_session)).As<ISessionLocator>();
+
+            _session.Delete(string.Format("from {0}", typeof(GammaRecord).FullName));
+            _session.Delete(string.Format("from {0}", typeof(DeltaRecord).FullName));
+            _session.Delete(string.Format("from {0}", typeof(EpsilonRecord).FullName));
+            _session.Delete(string.Format("from {0}", typeof(ContentItemVersionRecord).FullName));
+            _session.Delete(string.Format("from {0}", typeof(ContentItemRecord).FullName));
+            _session.Delete(string.Format("from {0}", typeof(ContentTypeRecord).FullName));
+            _session.Flush();
+            _session.Clear();
+
+            _container = builder.Build();
+            _manager = _container.Resolve<IContentManager>();
+
+        }
+
+        private void AddSampleData() {
+            _manager.Create<AlphaPart>("alpha", init => { });
+            _manager.Create<BetaPart>("beta", init => { });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "the frap value"; });
+            _manager.Create<DeltaPart>("delta", init => { init.Record.Quux = "the quux value"; });
+            _session.Flush();
+        }
+
+        [Test]
+        public void SpecificTypeIsReturnedWhenSpecified() {
+            AddSampleData();
+
+            var alphaBeta = _manager.Query().Where(x => x.WithRecord("ContentType").In("Name", new [] {"alpha", "beta"})).List();
+
+            Assert.That(alphaBeta.Count(), Is.EqualTo(2));
+            Assert.That(alphaBeta.Count(x => x.Has<AlphaPart>()), Is.EqualTo(1));
+            Assert.That(alphaBeta.Count(x => x.Has<BetaPart>()), Is.EqualTo(1));
+            Assert.That(alphaBeta.Count(x => x.Has<GammaPart>()), Is.EqualTo(0));
+            Assert.That(alphaBeta.Count(x => x.Has<DeltaPart>()), Is.EqualTo(0));
+
+            var gammaDelta = _manager.Query().Where(x => x.WithRecord("ContentType").In("Name", new[] { "gamma", "delta" })).List();
+
+            Assert.That(gammaDelta.Count(), Is.EqualTo(2));
+            Assert.That(gammaDelta.Count(x => x.Has<AlphaPart>()), Is.EqualTo(0));
+            Assert.That(gammaDelta.Count(x => x.Has<BetaPart>()), Is.EqualTo(0));
+            Assert.That(gammaDelta.Count(x => x.Has<GammaPart>()), Is.EqualTo(1));
+            Assert.That(gammaDelta.Count(x => x.Has<DeltaPart>()), Is.EqualTo(1));
+        }
+
+        [Test]
+        public void WherePredicateRestrictsResults() {
+            AddSampleData();
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "one"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "two"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "three"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "four"; });
+            _session.Flush();
+
+            var twoOrFour = _manager.Query<GammaPart, GammaRecord>()
+                .Where(x => x.WithRecord("GammaRecord").Or(a => a.Eq("Frap", "one"), b => b.Eq("Frap", "four")))
+                .List();
+
+            Assert.That(twoOrFour.Count(), Is.EqualTo(2));
+            Assert.That(twoOrFour.Count(x => x.Has<GammaPart>()), Is.EqualTo(2));
+            Assert.That(twoOrFour.Count(x => x.Get<GammaPart>().Record.Frap == "one"), Is.EqualTo(1));
+            Assert.That(twoOrFour.Count(x => x.Get<GammaPart>().Record.Frap == "four"), Is.EqualTo(1));
+        }
+
+
+        [Test]
+        public void EmptyWherePredicateRequiresRecord() {
+            AddSampleData();
+            var gammas = _manager.Query().Where(x => x.WithRecord("GammaRecord")).List(); // simulates an inner join
+            var deltas = _manager.Query().Where(x => x.WithRecord("DeltaRecord")).List();
+
+            Assert.That(gammas.Count(), Is.EqualTo(1));
+            Assert.That(deltas.Count(), Is.EqualTo(1));
+            Assert.That(gammas.AsPart<GammaPart>().Single().Record.Frap, Is.EqualTo("the frap value"));
+            Assert.That(deltas.AsPart<DeltaPart>().Single().Record.Quux, Is.EqualTo("the quux value"));
+        }
+
+        [Test]
+        public void OrderMaySortOnJoinedRecord() {
+            AddSampleData();
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "one"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "two"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "three"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "four"; });
+            _session.Flush();
+            _session.Clear();
+
+            var ascending = _manager.Query("gamma")
+                .OrderBy(x => x.WithRecord("GammaRecord").Asc("Frap"))
+                .List<GammaPart>().ToList();
+
+            Assert.That(ascending.Count(), Is.EqualTo(5));
+            Assert.That(ascending.First().Record.Frap, Is.EqualTo("four"));
+            Assert.That(ascending.Last().Record.Frap, Is.EqualTo("two"));
+
+            _session.Clear();
+
+            var descending = _manager.Query<GammaPart, GammaRecord>()
+                .OrderBy(x => x.WithRecord("GammaRecord").Desc("Frap"))
+                .List().ToList();
+
+            Assert.That(descending.Count(), Is.EqualTo(5));
+            Assert.That(descending.First().Record.Frap, Is.EqualTo("two"));
+            Assert.That(descending.Last().Record.Frap, Is.EqualTo("four"));
+        }
+
+        [Test]
+        public void SkipAndTakeProvidePagination() {
+            AddSampleData();
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "one"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "two"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "three"; });
+            _manager.Create<GammaPart>("gamma", init => { init.Record.Frap = "four"; });
+            _session.Flush();
+
+            var reverseById = _manager.Query()
+                .OrderBy(x => x.WithRecord("GammaRecord").Desc("Id"))
+                .List();
+
+            var subset = _manager.Query()
+                .OrderBy(x => x.WithRecord("GammaRecord").Desc("Id"))
+                .Slice(2, 3);
+
+            Assert.That(subset.Count(), Is.EqualTo(3));
+            Assert.That(subset.First().Id, Is.EqualTo(reverseById.Skip(2).First().Id));
+            Assert.That(subset.Skip(1).First().Id, Is.EqualTo(reverseById.Skip(3).First().Id));
+            Assert.That(subset.Skip(2).First().Id, Is.EqualTo(reverseById.Skip(4).First().Id));
+        }
+
+
+        [Test]
+        public void QueryShouldJoinVersionedRecords() {
+            AddSampleData();
+            _manager.Create<GammaPart>("gamma", init => {
+                init.Record.Frap = "one";
+                init.As<EpsilonPart>().Record.Quad = "1";
+            });
+            _manager.Create<GammaPart>("gamma", init => {
+                init.Record.Frap = "two";
+                init.As<EpsilonPart>().Record.Quad = "2";
+            });
+            _manager.Create<GammaPart>("gamma", init => {
+                init.Record.Frap = "three";
+                init.As<EpsilonPart>().Record.Quad = "3";
+            });
+            _manager.Create<GammaPart>("gamma", init => {
+                init.Record.Frap = "four";
+                init.As<EpsilonPart>().Record.Quad = "4";
+            });
+            _session.Flush();
+            _session.Clear();
+
+            var results = _manager.Query("gamma")
+                .Where(x => x.WithVersionRecord("EpsilonRecord").Or(a => a.Eq("Quad", "2"), b => b.Eq("Quad", "3")))
+                .OrderBy(x => x.WithVersionRecord("EpsilonRecord").Desc("Quad"))
+                .List<EpsilonPart>();
+
+            Assert.That(results.Count(), Is.EqualTo(2));
+            Assert.That(results.First().Record, Has.Property("Quad").EqualTo("3"));
+            Assert.That(results.Last().Record, Has.Property("Quad").EqualTo("2"));
+        }
+    }
+}
+
+
+

src/Orchard.Tests/Orchard.Framework.Tests.csproj

@@ -169,6 +169,7 @@
       <SubType>Code</SubType>
     </Compile>
     <Compile Include="ContentManagement\ContentQueryTests.cs" />
+    <Compile Include="ContentManagement\DynamicContentQueryTests.cs" />
     <Compile Include="ContentManagement\DefaultContentManagerTests.cs">
       <SubType>Code</SubType>
     </Compile>

src/Orchard/ContentManagement/DefaultContentQuery.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
@@ -30,37 +31,36 @@ namespace Orchard.ContentManagement {
             return _session;
         }
 
-        ICriteria BindCriteriaByPath(ICriteria criteria, string path) {
+        internal ICriteria BindCriteriaByPath(ICriteria criteria, string path) {
             return criteria.GetCriteriaByPath(path) ?? criteria.CreateCriteria(path);
         }
 
-        ICriteria BindTypeCriteria() {
+        internal ICriteria BindTypeCriteria() {
             // ([ContentItemVersionRecord] >join> [ContentItemRecord]) >join> [ContentType]
 
             return BindCriteriaByPath(BindItemCriteria(), "ContentType");
         }
 
-        ICriteria BindItemCriteria() {
+        internal ICriteria BindItemCriteria() {
             // [ContentItemVersionRecord] >join> [ContentItemRecord]
 
             return BindCriteriaByPath(BindItemVersionCriteria(), "ContentItemRecord");
         }
 
-        ICriteria BindItemVersionCriteria() {
+        internal ICriteria BindItemVersionCriteria() {
             if (_itemVersionCriteria == null) {
                 _itemVersionCriteria = BindSession().CreateCriteria<ContentItemVersionRecord>();
             }
             return _itemVersionCriteria;
         }
 
-        ICriteria BindPartCriteria<TRecord>() where TRecord : ContentPartRecord {
+        internal ICriteria BindPartCriteria<TRecord>() where TRecord : ContentPartRecord {
             if (typeof(TRecord).IsSubclassOf(typeof(ContentPartVersionRecord))) {
                 return BindCriteriaByPath(BindItemVersionCriteria(), typeof(TRecord).Name);
             }
             return BindCriteriaByPath(BindItemCriteria(), typeof(TRecord).Name);
         }
 
-
         private void ForType(params string[] contentTypeNames) {
             if (contentTypeNames != null && contentTypeNames.Length != 0)
                 BindTypeCriteria().Add(Restrictions.InG("Name", contentTypeNames));
@@ -92,6 +92,15 @@ namespace Orchard.ContentManagement {
             }
         }
 
+        private void Where(Action<IExpressionFactory> expression) {
+            var expressionFactory = new DefaultExpressionFactory(this);
+
+            expression(expressionFactory);
+            if (expressionFactory.Criterion != null) {
+                expressionFactory.Criteria.Add(expressionFactory.Criterion);
+            }
+        }
+
         private void OrderBy<TRecord, TKey>(Expression<Func<TRecord, TKey>> keySelector) where TRecord : ContentPartRecord {
             // build a linq to nhibernate expression
             var options = new QueryOptions();
@@ -108,6 +117,15 @@ namespace Orchard.ContentManagement {
             }
         }
 
+        private void OrderBy(Action<ISortFactory> expression) {
+            var sortFactory = new DefaultSortFactory(this);
+
+            expression(sortFactory);
+            if (sortFactory.Order != null) {
+                sortFactory.Criteria.AddOrder(sortFactory.Order);
+            }
+        }
+
         private void OrderByDescending<TRecord, TKey>(Expression<Func<TRecord, TKey>> keySelector) where TRecord : ContentPartRecord {
             // build a linq to nhibernate expression
             var options = new QueryOptions();
@@ -126,7 +144,7 @@ namespace Orchard.ContentManagement {
 
         private IEnumerable<ContentItem> Slice(int skip, int count) {
             var criteria = BindItemVersionCriteria();
-            
+
             criteria.ApplyVersionOptionsRestrictions(_versionOptions);
 
             // TODO: put 'removed false' filter in place
@@ -197,6 +215,11 @@ namespace Orchard.ContentManagement {
                 return new ContentQuery<T, TRecord>(_query);
             }
 
+            IContentQuery<T> IContentQuery<T>.Where(Action<IExpressionFactory> predicate) {
+                _query.Where(predicate);
+                return new ContentQuery<T>(_query);
+            }
+
             IContentQuery<T, TRecord> IContentQuery<T>.Where<TRecord>(Expression<Func<TRecord, bool>> predicate) {
                 _query.Where(predicate);
                 return new ContentQuery<T, TRecord>(_query);
@@ -211,8 +234,12 @@ namespace Orchard.ContentManagement {
                 _query.OrderByDescending(keySelector);
                 return new ContentQuery<T, TRecord>(_query);
             }
-        }
 
+            IContentQuery<T> IContentQuery<T>.OrderBy(Action<ISortFactory> order) {
+                _query.OrderBy(order);
+                return new ContentQuery<T>(_query);
+            }
+        }
 
         class ContentQuery<T, TR> : ContentQuery<T>, IContentQuery<T, TR>
             where T : IContent
@@ -242,6 +269,200 @@ namespace Orchard.ContentManagement {
             }
         }
 
+        public class DefaultExpressionFactory : IExpressionFactory {
+            private readonly DefaultContentQuery _query;
+            public ICriterion Criterion { get; private set; }
+            public ICriteria Criteria { get; private set; }
+
+            public DefaultExpressionFactory(DefaultContentQuery query) {
+                _query = query;
+            }
+
+            public IExpressionFactory WithRecord(string path) {
+                Criteria = _query.BindCriteriaByPath(_query.BindItemCriteria(), path);
+                return this;
+            }
+
+            public IExpressionFactory WithVersionRecord(string path) {
+                Criteria = _query.BindCriteriaByPath(_query.BindItemVersionCriteria(), path);
+                return this;
+            }
+
+            public void Eq(string propertyName, object value) {
+                Criterion = Restrictions.Eq(propertyName, value);
+            }
+
+            public void Like(string propertyName, object value) {
+                Criterion = Restrictions.Like(propertyName, value);
+            }
+
+            public void Like(string propertyName, string value, MatchMode matchMode, char? escapeChar) {
+                Criterion = Restrictions.Like(propertyName, value);
+            }
+
+            public void Like(string propertyName, string value, MatchMode matchMode) {
+                Criterion = Restrictions.Like(propertyName, value);
+            }
+
+            public void InsensitiveLike(string propertyName, string value, MatchMode matchMode) {
+                Criterion = Restrictions.InsensitiveLike(propertyName, value);
+            }
+
+            public void InsensitiveLike(string propertyName, object value) {
+                Criterion = Restrictions.InsensitiveLike(propertyName, value);
+            }
+
+            public void Gt(string propertyName, object value) {
+                Criterion = Restrictions.Gt(propertyName, value);
+            }
+
+            public void Lt(string propertyName, object value) {
+                Criterion = Restrictions.Lt(propertyName, value);
+            }
+
+            public void Le(string propertyName, object value) {
+                Criterion = Restrictions.Le(propertyName, value);
+            }
+
+            public void Ge(string propertyName, object value) {
+                Criterion = Restrictions.Ge(propertyName, value);
+            }
+
+            public void Between(string propertyName, object lo, object hi) {
+                Criterion = Restrictions.Between(propertyName, lo, hi);
+            }
+
+            public void In(string propertyName, object[] values) {
+                Criterion = Restrictions.In(propertyName, values);
+            }
+
+            public void In(string propertyName, ICollection values) {
+                Criterion = Restrictions.In(propertyName, values);
+            }
+
+            public void InG<T>(string propertyName, ICollection<T> values) {
+                Criterion = Restrictions.InG(propertyName, values);
+            }
+
+            public void IsNull(string propertyName) {
+                Criterion = Restrictions.IsNull(propertyName);
+            }
+
+            public void EqProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.EqProperty(propertyName, otherPropertyName);
+            }
+
+            public void NotEqProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.NotEqProperty(propertyName, otherPropertyName);
+            }
+
+            public void GtProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.GtProperty(propertyName, otherPropertyName);
+            }
+
+            public void GeProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.GeProperty(propertyName, otherPropertyName);
+            }
+
+            public void LtProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.LtProperty(propertyName, otherPropertyName);
+            }
+
+            public void LeProperty(string propertyName, string otherPropertyName) {
+                Criterion = Restrictions.LeProperty(propertyName, otherPropertyName);
+            }
+
+            public void IsNotNull(string propertyName) {
+                Criterion = Restrictions.IsNotNull(propertyName);
+            }
+
+            public void IsNotEmpty(string propertyName) {
+                Criterion = Restrictions.IsNotEmpty(propertyName);
+            }
+
+            public void IsEmpty(string propertyName) {
+                Criterion = Restrictions.IsEmpty(propertyName);
+            }
+
+            public void And(Action<IExpressionFactory> lhs, Action<IExpressionFactory> rhs) {
+                lhs(this);
+                ICriterion a = Criterion;
+                rhs(this);
+                ICriterion b = Criterion;
+                Criterion = Restrictions.And(a, b);
+            }
+
+            public void Or(Action<IExpressionFactory> lhs, Action<IExpressionFactory> rhs) {
+                lhs(this);
+                ICriterion a = Criterion;
+                rhs(this);
+                ICriterion b = Criterion;
+                Criterion = Restrictions.Or(a, b);
+            }
+
+            public void Not(Action<IExpressionFactory> expression) {
+                expression(this);
+                ICriterion a = Criterion;
+                Criterion = Restrictions.Not(a);
+            }
+
+            public void Conjunction(Action<IExpressionFactory> expression, params Action<IExpressionFactory>[] otherExpressions) {
+                var junction = Restrictions.Conjunction();
+                foreach (var exp in Enumerable.Empty<Action<IExpressionFactory>>().Union(new[] { expression }).Union(otherExpressions)) {
+                    exp(this);
+                    junction.Add(Criterion);
+                }
+
+                Criterion = junction;
+            }
+
+            public void Disjunction(Action<IExpressionFactory> expression, params Action<IExpressionFactory>[] otherExpressions) {
+                var junction = Restrictions.Disjunction();
+                foreach (var exp in Enumerable.Empty<Action<IExpressionFactory>>().Union(new[] { expression }).Union(otherExpressions)) {
+                    exp(this);
+                    junction.Add(Criterion);
+                }
+
+                Criterion = junction;
+            }
+
+            public void AllEq(IDictionary propertyNameValues) {
+                Criterion = Restrictions.AllEq(propertyNameValues);
+            }
+
+            public void NaturalId() {
+                Criterion = Restrictions.NaturalId();
+            }
+
+        }
+
+        public class DefaultSortFactory : ISortFactory {
+            private readonly DefaultContentQuery _query;
+            public Order Order { get; private set; }
+            public ICriteria Criteria { get; private set; }
+
+            public DefaultSortFactory(DefaultContentQuery query) {
+                _query = query;
+            }
+
+            public ISortFactory WithRecord(string path) {
+                Criteria = _query.BindCriteriaByPath(_query.BindItemCriteria(), path);
+                return this;
+            }
+
+            public ISortFactory WithVersionRecord(string path) {
+                Criteria = _query.BindCriteriaByPath(_query.BindItemVersionCriteria(), path);
+                return this;
+            }
+
+            public void Asc(string propertyName) {
+                Order = Order.Asc(propertyName);
+            }
+
+            public void Desc(string propertyName) {
+                Order = Order.Desc(propertyName);
+            }
+        }
     }
 
     internal static class CriteriaExtensions {

src/Orchard/ContentManagement/IContentQuery.cs

@@ -5,7 +5,7 @@ using Orchard.ContentManagement.Records;
 
 namespace Orchard.ContentManagement {
 
-    public interface IContentQuery {
+    public interface IContentQuery{
         IContentManager ContentManager { get; }
         IContentQuery<TPart> ForPart<TPart>() where TPart : IContent;
     }
@@ -20,7 +20,10 @@ namespace Orchard.ContentManagement {
 
         IContentQuery<TPart, TRecord> Join<TRecord>() where TRecord : ContentPartRecord;
 
+        IContentQuery<TPart> Where(Action<IExpressionFactory> predicate);
         IContentQuery<TPart, TRecord> Where<TRecord>(Expression<Func<TRecord, bool>> predicate) where TRecord : ContentPartRecord;
+
+        IContentQuery<TPart> OrderBy(Action<ISortFactory> order);
         IContentQuery<TPart, TRecord> OrderBy<TRecord, TKey>(Expression<Func<TRecord, TKey>> keySelector) where TRecord : ContentPartRecord;
         IContentQuery<TPart, TRecord> OrderByDescending<TRecord, TKey>(Expression<Func<TRecord, TKey>> keySelector) where TRecord : ContentPartRecord;
     }

src/Orchard/ContentManagement/IExpressionFactory.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Orchard.ContentManagement {
+    public interface IExpressionFactory {
+        IExpressionFactory WithRecord(string recordName);
+        IExpressionFactory WithVersionRecord(string recordName);
+
+        void Eq(string propertyName, object value);
+        void Like(string propertyName, object value);
+        void Like(string propertyName, string value, MatchMode matchMode, char? escapeChar);
+        void Like(string propertyName, string value, MatchMode matchMode);
+        void InsensitiveLike(string propertyName, string value, MatchMode matchMode);
+        void InsensitiveLike(string propertyName, object value);
+        void Gt(string propertyName, object value);
+        void Lt(string propertyName, object value);
+        void Le(string propertyName, object value);
+        void Ge(string propertyName, object value);
+        void Between(string propertyName, object lo, object hi);
+        void In(string propertyName, object[] values);
+        void In(string propertyName, ICollection values);
+        void InG<T>(string propertyName, ICollection<T> values);
+        void IsNull(string propertyName);
+        void EqProperty(string propertyName, string otherPropertyName);
+        void NotEqProperty(string propertyName, string otherPropertyName);
+        void GtProperty(string propertyName, string otherPropertyName);
+        void GeProperty(string propertyName, string otherPropertyName);
+        void LtProperty(string propertyName, string otherPropertyName);
+        void LeProperty(string propertyName, string otherPropertyName);
+        void IsNotNull(string propertyName);
+        void IsNotEmpty(string propertyName);
+        void IsEmpty(string propertyName);
+        void And(Action<IExpressionFactory> lhs, Action<IExpressionFactory> rhs);
+        void Or(Action<IExpressionFactory> lhs, Action<IExpressionFactory> rhs);
+        void Not(Action<IExpressionFactory> expression);
+        void Conjunction(Action<IExpressionFactory> expression, params Action<IExpressionFactory>[] otherExpressions);
+        void Disjunction(Action<IExpressionFactory> expression, params Action<IExpressionFactory>[] otherExpressions);
+        void AllEq(IDictionary propertyNameValues);
+        void NaturalId();        
+    }
+
+    public enum MatchMode {
+        Exact,
+        Start,
+        End,
+        Anywhere
+    }
+}

src/Orchard/ContentManagement/ISortFactory.cs

@@ -0,0 +1,9 @@
+namespace Orchard.ContentManagement {
+    public interface ISortFactory {
+        ISortFactory WithRecord(string recordName);
+        ISortFactory WithVersionRecord(string recordName);
+
+        void Asc(string propertyName);
+        void Desc(string propertyName);
+    }
+}

src/Orchard/Orchard.Framework.csproj

@@ -169,6 +169,7 @@
     <Compile Include="ContentManagement\ContentIdentity.cs" />
     <Compile Include="ContentManagement\ContentItemBehavior.cs" />
     <Compile Include="ContentManagement\ContentPartBehavior.cs" />
+    <Compile Include="ContentManagement\ISortFactory.cs" />
     <Compile Include="ContentManagement\DefaultContentDisplay.cs" />
     <Compile Include="ContentManagement\Drivers\ContentShapeResult.cs" />
     <Compile Include="ContentManagement\FieldStorage\IFieldStorageEvents.cs" />
@@ -178,6 +179,7 @@
     <Compile Include="ContentManagement\Handlers\ImportContentContext.cs" />
     <Compile Include="ContentManagement\Handlers\TitleAspectHandler.cs" />
     <Compile Include="ContentManagement\IContentBehavior.cs" />
+    <Compile Include="ContentManagement\IExpressionFactory.cs" />
     <Compile Include="ContentManagement\ImportContentSession.cs" />
     <Compile Include="ContentManagement\MetaData\Services\ISettingsFormatter.cs" />
     <Compile Include="ContentManagement\QueryHints.cs" />