Right now, the import_data command truncates the CensusObservation table and bulk-imports the CSV output from the Makefile. We should modify this to make it iterate the CSV, check if a CensusObservation exists matching the FIPS code and variable name, and optionally update that record.
It would also be useful to add a --truncate flag to the command to allow us to truncate the table and start over if it gets into a weird state.
Right now, the import_data command truncates the CensusObservation table and bulk-imports the CSV output from the Makefile. We should modify this to make it iterate the CSV, check if a CensusObservation exists matching the FIPS code and variable name, and optionally update that record.
It would also be useful to add a --truncate flag to the command to allow us to truncate the table and start over if it gets into a weird state.