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known_bugs.md

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  1. String vs Array in DB and List vs Vector in R

    • Description: When retrieving JSON data from PostgreSQL, jsonlite::fromJSON incorrectly simplifies arrays with a single element into scalar values or converts scalars into arrays. This results in inconsistent data structures, particularly when handling nested or mixed types (e.g., arrays, objects).

    • Impact: Many jsonb PostgreSQL queries need to account for both arrays and strings when an item has been saved in R. All data returned by MapX editor, validated by a JSON schema, is always correct.

  2. jsonlite Converts NULL to {}

    • Description: jsonlite::toJSON(NULL) results in {}, which can introduce potential bugs in the application. Some fixes have been implemented to address this. Similarly, toJSON(NA) results in [null]. While auto_unbox is useful, it can cause issues where an array is expected in JSON.