Class: ActiveRecord::LogSubscriber

Inherits:
ActiveSupport::LogSubscriber
  • Object
show all
Defined in:
lib/active_record/log_subscriber.rb

Constant Summary collapse

IGNORE_PAYLOAD_NAMES = 
["SCHEMA", "EXPLAIN"]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LogSubscriber

Returns a new instance of LogSubscriber.



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# File 'lib/active_record/log_subscriber.rb', line 18

def initialize
  super
  @odd = false
end

Class Method Details

.reset_runtime ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 13

def self.reset_runtime
  rt, self.runtime = runtime, 0
  rt
end

.runtime ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 9

def self.runtime
  ActiveRecord::RuntimeRegistry.sql_runtime ||= 0
end

.runtime=(value) ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 5

def self.runtime=(value)
  ActiveRecord::RuntimeRegistry.sql_runtime = value
end

Instance Method Details

#logger ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 69

def logger
  ActiveRecord::Base.logger
end

#odd? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/log_subscriber.rb', line 65

def odd?
  @odd = !@odd
end

#render_bind(column, value) ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 23

def render_bind(column, value)
  if column
    if column.binary?
      # This specifically deals with the PG adapter that casts bytea columns into a Hash.
      value = value[:value] if value.is_a?(Hash)
      value = value ? "<#{value.bytesize} bytes of binary data>" : "<NULL binary data>"
    end

    [column.name, value]
  else
    [nil, value]
  end
end

#sql(event) ⇒ Object 



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# File 'lib/active_record/log_subscriber.rb', line 37

def sql(event)
  self.class.runtime += event.duration
  return unless logger.debug?

  payload = event.payload

  return if IGNORE_PAYLOAD_NAMES.include?(payload[:name])

  name  = "#{payload[:name]} (#{event.duration.round(1)}ms)"
  sql   = payload[:sql]
  binds = nil

  unless (payload[:binds] || []).empty?
    binds = "  " + payload[:binds].map { |col,v|
      render_bind(col, v)
    }.inspect
  end

  if odd?
    name = color(name, CYAN, true)
    sql  = color(sql, nil, true)
  else
    name = color(name, MAGENTA, true)
  end

  debug "  #{name}  #{sql}#{binds}"
end