XLSX export with automatic schema

Specification

• Takes list of records
  • records must all be of same record type
• Generate schema for this record type
• define identifying properties with "id" everywhere (for list valued references)
• make sure that there are ID columns where needed
• generate XLSX template
• fill XLSX template with retrieved data

DoD

• Implement:
  • Generate json schema for chosen record list using JsonSchemaExporter
    Problem: JsonSchemaExporter behaves weirdly with references -> Investigate solutions
  • Generate XLSX tables from json schema using XLSXTemplateGenerator, set foreign_keys to id
    Problem: modelschema/arrayschema is not used consistently -> Add support for arrayschema everywhere
  • Fill XLSX tables with data from record list using TemplateFiller
• Followup issues created if necessary:
  • Import