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.



18
19
20
21
 
# File 'lib/active_record/log_subscriber.rb', line 18

def initialize
  super
  @odd_or_even = false
end

Class Method Details

.reset_runtime ⇒ Object 



13
14
15
16
 
# File 'lib/active_record/log_subscriber.rb', line 13

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

.runtime ⇒ Object 



9
10
11
 
# File 'lib/active_record/log_subscriber.rb', line 9

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

.runtime=(value) ⇒ Object 



5
6
7
 
# File 'lib/active_record/log_subscriber.rb', line 5

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

Instance Method Details

#identity(event) ⇒ Object 



63
64
65
66
67
68
69
70
 
# File 'lib/active_record/log_subscriber.rb', line 63

def identity(event)
  return unless logger.debug?

  name = color(event.payload[:name], odd? ? CYAN : MAGENTA, true)
  line = odd? ? color(event.payload[:line], nil, true) : event.payload[:line]

  debug "  #{name}  #{line}"
end

#logger ⇒ Object 



76
77
78
 
# File 'lib/active_record/log_subscriber.rb', line 76

def logger
  ActiveRecord::Base.logger
end

#odd? ⇒ Boolean

Returns:

  • (Boolean) 


72
73
74
 
# File 'lib/active_record/log_subscriber.rb', line 72

def odd?
  @odd_or_even = !@odd_or_even
end

#render_bind(column, value) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/active_record/log_subscriber.rb', line 23

def render_bind(column, value)
  if column
    if column.binary?
      value = "<#{value.bytesize} bytes of binary data>"
    end

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

#sql(event) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/active_record/log_subscriber.rb', line 35

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].squeeze(' ')
  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