Class: RailsPulse::Routes::Cards::ErrorRatePerRoute

Inherits:
Object
  • Object
show all
Defined in:
app/models/rails_pulse/routes/cards/error_rate_per_route.rb

Instance Method Summary collapse

Constructor Details

#initialize(route: nil, disabled_tags: [], show_non_tagged: true) ⇒ ErrorRatePerRoute

Returns a new instance of ErrorRatePerRoute.



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# File 'app/models/rails_pulse/routes/cards/error_rate_per_route.rb', line 5

def initialize(route: nil, disabled_tags: [], show_non_tagged: true)
  @route = route
  @disabled_tags = disabled_tags
  @show_non_tagged = show_non_tagged
end

Instance Method Details

#to_metric_card ⇒ Object 



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# File 'app/models/rails_pulse/routes/cards/error_rate_per_route.rb', line 11

def to_metric_card
  last_7_days = 7.days.ago.beginning_of_day
  previous_7_days = 14.days.ago.beginning_of_day

  # Single query to get all error metrics with conditional aggregation
  base_query = RailsPulse::Summary
    .with_tag_filters(@disabled_tags, @show_non_tagged)
    .where(
      summarizable_type: "RailsPulse::Route",
      period_type: "day",
      period_start: 2.weeks.ago.beginning_of_day..Time.current
    )
  base_query = base_query.where(summarizable_id: @route.id) if @route

  metrics = base_query.select(
    "SUM(error_count) AS total_errors",
    "SUM(count) AS total_requests",
    "SUM(CASE WHEN period_start >= '#{last_7_days.strftime('%Y-%m-%d %H:%M:%S')}' THEN error_count ELSE 0 END) AS current_errors",
    "SUM(CASE WHEN period_start >= '#{previous_7_days.strftime('%Y-%m-%d %H:%M:%S')}' AND period_start < '#{last_7_days.strftime('%Y-%m-%d %H:%M:%S')}' THEN error_count ELSE 0 END) AS previous_errors"
  ).take

  # Calculate metrics from single query result
  total_errors = metrics.total_errors || 0
  total_requests = metrics.total_requests || 0
  current_period_errors = metrics.current_errors || 0
  previous_period_errors = metrics.previous_errors || 0

  # Calculate overall error rate percentage
  overall_error_rate = total_requests > 0 ? (total_errors.to_f / total_requests * 100).round(2) : 0

  # Calculate trend
  percentage = previous_period_errors.zero? ? 0 : ((previous_period_errors - current_period_errors) / previous_period_errors.to_f * 100).abs.round(1)
  trend_icon = percentage < 0.1 ? "move-right" : current_period_errors < previous_period_errors ? "trending-down" : "trending-up"
  trend_amount = previous_period_errors.zero? ? "0%" : "#{percentage}%"

  # Sparkline data by day with zero-filled days over the last 14 days
  grouped_daily = base_query
    .group_by_day(:period_start, time_zone: "UTC")
    .sum(:error_count)

  start_day = 2.weeks.ago.beginning_of_day.to_date
  end_day = Time.current.to_date

  sparkline_data = {}
  (start_day..end_day).each do |day|
    total = grouped_daily[day] || 0
    label = day.strftime("%b %-d")
    sparkline_data[label] = { value: total }
  end

  {
    id: "error_rate_per_route",
    context: "routes",
    title: "Error Rate Per Route",
    summary: "#{overall_error_rate}%",
    chart_data: sparkline_data,
    trend_icon: trend_icon,
    trend_amount: trend_amount,
    trend_text: "Compared to last week"
  }
end