SchemaScanner and dynamic FeatureWriter method

I also often struggle to get this to work. Most of the times my issue is the order of features. The schema feature must reach the FeatureWriter before any data features. I use AttributeCreators to create attributes “Order” with value 1 for the schema and 2 for the data features and a sorter which sorts on order. This usually solves my issue.

Attached working sample.

Same, I usually use a Sorter with a dummy AttributeCreator Attribute to sort on to make sure the Schema Feature(s) arrives to the Writer first.

Sorter works because it is one of the “Blocker” Transformers that lets no features past it until it is completed its operation in its default Blocking mode, and so prevents a parallel workflow getting around it to send other features first to the Writer.

Apart from that have to watch that some Readers and Transformers output Schema Features with either slightly different Feature Type Attribute Names needing to be renamed to match the Data Features Feature Type Attribute Name, or even slightly differently formatted Feature Type values where the Schema Feature may need to be exploded temporarily, modified, and then rebuilt into a Schema Attribute List.