Data model conditions - DRY'd predicate code in preparation for events

src/Artemis.Storage/Migrations/M6PredicateAbstraction.cs

@@ -0,0 +1,34 @@
+using Artemis.Storage.Migrations.Interfaces;
+using LiteDB;
+
+namespace Artemis.Storage.Migrations
+{
+    public class M6PredicateAbstraction : IStorageMigration
+    {
+        public int UserVersion => 7;
+
+        public void Apply(LiteRepository repository)
+        {
+            ILiteCollection<BsonDocument> collection = repository.Database.GetCollection("ProfileEntity");
+            foreach (BsonDocument bsonDocument in collection.FindAll())
+            {
+                
+                foreach (BsonValue bsonLayer in bsonDocument["Layers"].AsArray)
+                {
+                    bsonLayer["DisplayCondition"] = null;
+                    foreach (BsonValue bsonPropertyEntity in bsonLayer["PropertyEntities"].AsArray)
+                        bsonPropertyEntity["DataBindingEntities"].AsArray.Clear();
+                }
+
+                foreach (BsonValue bsonLayer in bsonDocument["Folders"].AsArray)
+                {
+                    bsonLayer["DisplayCondition"] = null;
+                    foreach (BsonValue bsonPropertyEntity in bsonLayer["PropertyEntities"].AsArray)
+                        bsonPropertyEntity["DataBindingEntities"].AsArray.Clear();
+                }
+
+                collection.Update(bsonDocument);
+            }
+        }
+    }
+}