Adding AreRelated method to the RelationService

src/Umbraco.Core/Services/IRelationService.cs

@@ -182,6 +182,14 @@ namespace Umbraco.Core.Services
         /// <returns>Returns <c>True</c> if any relations exists with the given Id, otherwise <c>False</c></returns>
         bool IsRelated(int id);
 
+        /// <summary>
+        /// Checks whether two items are related
+        /// </summary>
+        /// <param name="parentId">Id of the Parent relation</param>
+        /// <param name="childId">Id of the Child relation</param>
+        /// <returns>Returns <c>True</c> if any relations exists with the given Ids, otherwise <c>False</c></returns>
+        bool AreRelated(int parentId, int childId);
+
         /// <summary>
         /// Saves a <see cref="Relation"/>
         /// </summary>

src/Umbraco.Core/Services/RelationService.cs

@@ -397,6 +397,21 @@ namespace Umbraco.Core.Services
             }
         }
 
+        /// <summary>
+        /// Checks whether two items are related
+        /// </summary>
+        /// <param name="parentId">Id of the Parent relation</param>
+        /// <param name="childId">Id of the Child relation</param>
+        /// <returns>Returns <c>True</c> if any relations exists with the given Ids, otherwise <c>False</c></returns>
+        public bool AreRelated(int parentId, int childId)
+        {
+            using (var repository = _repositoryFactory.CreateRelationRepository(_uowProvider.GetUnitOfWork()))
+            {
+                var query = new Query<IRelation>().Where(x => x.ParentId == parentId && x.ChildId == childId);
+                return repository.GetByQuery(query).Any();
+            }
+        }
+
         /// <summary>
         /// Saves a <see cref="Relation"/>
         /// </summary>