I am not able reordering partner categories. Categories always appear in the order I have created them. In the source code, I see they are ordered by "parent_left, name", but I cannot understand what is this "parent_left" attribute and how to modify it.
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parent_left and parent_right, sets up a Nested set model to enable fast hierarchical queries on the records of the current model. These attributes are generated automatically, that are related to
the parent_id field, see ORM API documentation
Ok, thank you for this good explaination. However this does not tell me nothing about how to reorder categories...
You temporary change parent_id in all childrens, in next step restore parent_id (select positions to restore in right order).
