77 lines
3.0 KiB
Ruby
77 lines
3.0 KiB
Ruby
class Reading < ActiveRecord::Base
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def eql_reading?(reading)
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self.total_kwh_consumed_high == reading.total_kwh_consumed_high &&
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self.total_kwh_consumed_low == reading.total_kwh_consumed_low &&
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self.total_kwh_produced_high == reading.total_kwh_produced_high &&
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self.total_kwh_produced_low == reading.total_kwh_produced_low &&
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self.current_kw_consumed == reading.current_kw_consumed &&
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self.current_kw_produced == reading.current_kw_produced &&
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self.total_m3_gas_consumed == reading.total_m3_gas_consumed &&
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self.high_tarif == reading.high_tarif
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end
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# reduce precision to 1 digit behind comma
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def total_kwh_consumed_high=(kwh)
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write_attribute(:total_kwh_consumed_high,kwh.round(1))
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end
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# reduce precision to 1 digit behind comma
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def total_kwh_consumed_low=(kwh)
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write_attribute(:total_kwh_consumed_low,kwh.round(1))
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end
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# reduce precision to 1 digit behind comma
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def total_kwh_produced_high=(kwh)
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write_attribute(:total_kwh_produced_high,kwh.round(1))
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end
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# reduce precision to 1 digit behind comma
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def total_kwh_produced_low=(kwh)
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write_attribute(:total_kwh_produced_low,kwh.round(1))
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end
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# calculate difference with another reading
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# return a hash with differences (self - reading)
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def diff(reading)
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if reading
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{ :total_kwh_consumed_high => (self.total_kwh_consumed_high - reading.total_kwh_consumed_high).round(1),
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:total_kwh_consumed_low => (self.total_kwh_consumed_low - reading.total_kwh_consumed_low).round(1),
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:total_kwh_produced_high => (self.total_kwh_produced_high - reading.total_kwh_produced_high).round(1),
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:total_kwh_produced_low => (self.total_kwh_produced_low - reading.total_kwh_produced_low).round(1),
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:total_m3_gas_consumed => (self.total_m3_gas_consumed - reading.total_m3_gas_consumed).round(3) }
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else
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{ :total_kwh_consumed_high => self.total_kwh_consumed_high,
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:total_kwh_consumed_low => self.total_kwh_consumed_low,
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:total_kwh_produced_high => self.total_kwh_produced_high,
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:total_kwh_produced_low => self.total_kwh_produced_low,
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:total_m3_gas_consumed => self.total_m3_gas_consumed }
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end
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end
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#
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# Class methods
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#
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class << self
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# return readings from beginning of 'from' until end of 'to'
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def days(from, to)
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Reading.where("created_at > :begin AND created_at < :end", { :begin => from.to_date.beginning_of_day, :end => to.to_date.end_of_day})
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end
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def day(date)
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Reading.where("created_at > :begin AND created_at < :end", { :begin => date.to_date.beginning_of_day, :end => date.to_date.end_of_day})
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end
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def diff_on(date)
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readings_on = day(date)
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first = readings_on.first
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last = readings_on.last
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if last
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last.diff(first)
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else
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{ :total_kwh_consumed_high => 0, :total_kwh_consumed_low => 0, :total_kwh_produced_high => 0, :total_kwh_produced_low => 0, :total_m3_gas_consumed => 0 }
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end
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end
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end
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end
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