Category import: External Reference: SKU for categories

[paales]

After importing multiple categories we've came to the conclusion that categories should have a field like 'sku'. This 'sku' is just a string referencing the category in the external system.

This gives us great flexibility while importing:

• Category imports could update the path of a category, thus moving a category.
• Product imports can just reference the external ID, no need to generate the path.
• Product imports could only update category assignments without an external category, creating automatic protected categories.

Todo:

• [ ] Skip removing products from categories that don't have an external ID. If a category isn't maintained externally, the importer has no reason to change the category assignment. https://github.com/avstudnitz/AvS_FastSimpleImport/commit/01f3eb1889ae05e9bc347d0019c922023b44229f
  • [x] Skip categories that don't have an external category id.
  • [ ] Make switch that allows you to manage all categories, only external categories.
• [ ] ...