Refactoring identity inserts in db creation phase to support mysql

src/Umbraco.Core/Persistence/SqlSyntax/ModelDefinitions/DefinitionFactory.cs

@@ -28,6 +28,10 @@ namespace Umbraco.Core.Persistence.SqlSyntax.ModelDefinitions
                  var columnAttribute = propertyInfo.FirstAttribute<ColumnAttribute>();
                  string columnName = columnAttribute != null ? columnAttribute.Name : propertyInfo.Name;
 
+                 //Use PetaPoco's PrimaryKeyAttribute to set Identity property on TableDefinition
+                 var primaryKeyAttribute = modelType.FirstAttribute<PrimaryKeyAttribute>();
+                 tableDefinition.IsIdentity = primaryKeyAttribute != null && primaryKeyAttribute.autoIncrement;
+
                  //Creates a column definition and adds it to the collection on the table definition
                  var columnDefinition = new ColumnDefinition
                  {

src/Umbraco.Core/Persistence/SqlSyntax/ModelDefinitions/TableDefinition.cs

@@ -13,6 +13,7 @@ namespace Umbraco.Core.Persistence.SqlSyntax.ModelDefinitions
         }
 
         public string TableName { get; set; }
+        public bool IsIdentity { get; set; }
         public bool IsPrimaryKeyClustered
         {
             get { return ColumnDefinitions.Any(x => x.IsPrimaryKeyClustered); }