Module: DateFlag
- Defined in:
- lib/date_flag.rb
Constant Summary collapse
- VERSION =
File.read(File.('../VERSION', File.dirname(__FILE__))).chomp
Instance Method Summary collapse
Instance Method Details
#date_flag(field, options = { }) ⇒ Object
Usage:
class MyModel < ActiveRecord::Base
date_flag :flagged_at, action: :flag
end
m = MyModel.new m.flagged? # => false m.flag! # Assigns flag_at to current time m.flag = true # Same as flag! m.flagged? # => true
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# File 'lib/date_flag.rb', line 18 def date_flag(field, = { }) unless (defined?(@date_flags)) @date_flags = Set.new end name = ([:name] ? [:name] : field.to_s.sub(/_at$/, '')).to_sym action = ([:action] ? [:action] : name).to_sym @date_flags << name @date_flags << :"#{name}_at" scope_name = case ([:scope]) when nil, true name when false false else [:scope].to_s.to_sym end case (scope_name) when false, nil # Skip this operation when :send, :id # TODO: Invalid names, should raise exception or warning else scope scope_name, lambda { |*flag| case (flag.first) when false where(field => nil) when true, nil where.not(field => nil) else # FIX: Escape properly for Postgres/MySQL where([ "#{field}<=?", flag.first ]) end } end if ([:inverse]) scope [:inverse], lambda { |*flag| case (flag.first) when false where.not(field => nil) when true, nil where(field => nil) else # FIX: Escape properly for Postgres/MySQL where([ "#{field}>?", flag.first ]) end } end if (inverse_action = [:inverse_action] || [:inverse]) define_method(:"#{inverse_action}!") do write_attribute(field, nil) save! end end define_method(:"#{name}=") do |value| # The action= mutator method is used to manipulate the trigger time. # Values of nil, false, empty string, '0' or 0 are presumed to be # false and will nil out the time. A DateTime, Date or Time object # will be saved as-is, and anything else will just assign the current # time. case (value) when nil, false, '', '0', 0 write_attribute(field, nil) when DateTime, Date, Time write_attribute(field, value) else !read_attribute(field) and write_attribute(field, Time.now) end end define_method(:"#{name}") do value = read_attribute(field) value ? (value <= Time.now) : false end define_method(:"#{name}?") do # The name? accessor method will return true if the date is defined # and is prior to the current time, or false otherwise. value = read_attribute(field) value ? (value <= Time.now) : false end define_method(:"#{action}!") do |*at_time| # The name! method is used to set the trigger time. If the time is # already defined and is in the past, then the time is left unchanged. # If it is undefined or in the future, then the current time is # substituted. value = read_attribute(field) at_time = case (at_time.first) when false nil else at_time.first || value || Time.now end return if (at_time == value) write_attribute(field, at_time) save! end end |
#date_flag?(name) ⇒ Boolean
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# File 'lib/date_flag.rb', line 134 def date_flag?(name) return false unless (defined?(@date_flags)) return unless (name) @date_flags.include?(name.to_sym) end |