Beekeeper: meter change drops information of old meter

[mguentner]

We need to save this data in the platform. How to do it?

• [x] Read https://github.com/buzzn/core/blob/master/lib/beekeeper/importer/readings_registers_meters.rb#L15
• [x] Figure out how to create distinct hash of a meter / reading
• [x] Do a key-value dump by running the importer, store with hash(meter/reading) => meter_serial
• [x] feed that into the platform using e.g. rake

[mguentner]

This is how I currently dump it:

meterids = Group::Localpool.all.collect{|g| [g.slug, g.meters.collect{|meter| ["#{meter.legacy_buzznid}_#{meter.registers.sort_by{ |x| x.meta.name }.collect{|register| register.meta.name }.join('#')}", meter.product_serialnumber] }.to_h]}.to_h

[mguentner]

Needed to adjust output due to hash collisions:

meterids = Group::Localpool.all.collect{|g| [g.slug, g.meters.collect{|meter| ["#{meter.legacy_buzznid}_#{meter.registers.sort_by{ |x| x.meta.name }.collect{|register| "#{register.meta.name}_#{register.readings.order(:date).first.raw_value}" }.join('#')}", meter.product_serialnumber] }.to_h]}.to_h

[mguentner]

New magic:

meterids = Group::Localpool.all.collect{|g| [g.slug, g.meters.collect{|meter| ["#{meter.legacy_buzznid}_#{meter.registers.sort_by{ |x| x.meta.name }.collect{|register| "#{register.readings.order(:date).first.raw_value}_#{register.readings.order(:date).first.date}" }.join('#')}", meter.product_serialnumber] }.to_h]}.to_h

[mguentner]

I think we are done.