diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object')
9 files changed, 272 insertions, 54 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/blank.rb b/activesupport/lib/active_support/core_ext/object/blank.rb index 8a5eb4bc93..38e43478df 100644 --- a/activesupport/lib/active_support/core_ext/object/blank.rb +++ b/activesupport/lib/active_support/core_ext/object/blank.rb @@ -4,36 +4,42 @@ class Object # An object is blank if it's false, empty, or a whitespace string. # For example, '', ' ', +nil+, [], and {} are all blank. # - # This simplifies: + # This simplifies # - # if address.nil? || address.empty? + # address.nil? || address.empty? # - # ...to: + # to # - # if address.blank? + # address.blank? + # + # @return [true, false] def blank? - respond_to?(:empty?) ? empty? : !self + respond_to?(:empty?) ? !!empty? : !self end - # An object is present if it's not <tt>blank?</tt>. + # An object is present if it's not blank. + # + # @return [true, false] def present? !blank? end - # Returns object if it's <tt>present?</tt> otherwise returns +nil+. - # <tt>object.presence</tt> is equivalent to <tt>object.present? ? object : nil</tt>. + # Returns the receiver if it's present otherwise returns +nil+. + # <tt>object.presence</tt> is equivalent to # - # This is handy for any representation of objects where blank is the same - # as not present at all. For example, this simplifies a common check for - # HTTP POST/query parameters: + # object.present? ? object : nil + # + # For example, something like # # state = params[:state] if params[:state].present? # country = params[:country] if params[:country].present? # region = state || country || 'US' # - # ...becomes: + # becomes # # region = params[:state].presence || params[:country].presence || 'US' + # + # @return [Object] def presence self if present? end @@ -43,6 +49,8 @@ class NilClass # +nil+ is blank: # # nil.blank? # => true + # + # @return [true] def blank? true end @@ -52,6 +60,8 @@ class FalseClass # +false+ is blank: # # false.blank? # => true + # + # @return [true] def blank? true end @@ -61,6 +71,8 @@ class TrueClass # +true+ is not blank: # # true.blank? # => false + # + # @return [false] def blank? false end @@ -71,6 +83,8 @@ class Array # # [].blank? # => true # [1,2,3].blank? # => false + # + # @return [true, false] alias_method :blank?, :empty? end @@ -79,18 +93,28 @@ class Hash # # {}.blank? # => true # { key: 'value' }.blank? # => false + # + # @return [true, false] alias_method :blank?, :empty? end class String + BLANK_RE = /\A[[:space:]]*\z/ + # A string is blank if it's empty or contains whitespaces only: # - # ''.blank? # => true - # ' '.blank? # => true - # ' '.blank? # => true - # ' something here '.blank? # => false + # ''.blank? # => true + # ' '.blank? # => true + # "\t\n\r".blank? # => true + # ' blah '.blank? # => false + # + # Unicode whitespace is supported: + # + # "\u00a0".blank? # => true + # + # @return [true, false] def blank? - self !~ /[^[:space:]]/ + BLANK_RE === self end end @@ -99,6 +123,8 @@ class Numeric #:nodoc: # # 1.blank? # => false # 0.blank? # => false + # + # @return [false] def blank? false end diff --git a/activesupport/lib/active_support/core_ext/object/deep_dup.rb b/activesupport/lib/active_support/core_ext/object/deep_dup.rb index 1d639f3af6..2e99f4a1b8 100644 --- a/activesupport/lib/active_support/core_ext/object/deep_dup.rb +++ b/activesupport/lib/active_support/core_ext/object/deep_dup.rb @@ -8,8 +8,8 @@ class Object # dup = object.deep_dup # dup.instance_variable_set(:@a, 1) # - # object.instance_variable_defined?(:@a) #=> false - # dup.instance_variable_defined?(:@a) #=> true + # object.instance_variable_defined?(:@a) # => false + # dup.instance_variable_defined?(:@a) # => true def deep_dup duplicable? ? dup : self end @@ -22,8 +22,8 @@ class Array # dup = array.deep_dup # dup[1][2] = 4 # - # array[1][2] #=> nil - # dup[1][2] #=> 4 + # array[1][2] # => nil + # dup[1][2] # => 4 def deep_dup map { |it| it.deep_dup } end @@ -36,8 +36,8 @@ class Hash # dup = hash.deep_dup # dup[:a][:c] = 'c' # - # hash[:a][:c] #=> nil - # dup[:a][:c] #=> "c" + # hash[:a][:c] # => nil + # dup[:a][:c] # => "c" def deep_dup each_with_object(dup) do |(key, value), hash| hash[key.deep_dup] = value.deep_dup diff --git a/activesupport/lib/active_support/core_ext/object/duplicable.rb b/activesupport/lib/active_support/core_ext/object/duplicable.rb index 9cd7485e2e..3d2c809c9f 100644 --- a/activesupport/lib/active_support/core_ext/object/duplicable.rb +++ b/activesupport/lib/active_support/core_ext/object/duplicable.rb @@ -78,6 +78,9 @@ end require 'bigdecimal' class BigDecimal + # Needed to support Ruby 1.9.x, as it doesn't allow dup on BigDecimal, instead + # raises TypeError exception. Checking here on the runtime whether BigDecimal + # will allow dup or not. begin BigDecimal.new('4.56').dup diff --git a/activesupport/lib/active_support/core_ext/object/inclusion.rb b/activesupport/lib/active_support/core_ext/object/inclusion.rb index b5671f66d0..55f281b213 100644 --- a/activesupport/lib/active_support/core_ext/object/inclusion.rb +++ b/activesupport/lib/active_support/core_ext/object/inclusion.rb @@ -12,4 +12,16 @@ class Object rescue NoMethodError raise ArgumentError.new("The parameter passed to #in? must respond to #include?") end + + # Returns the receiver if it's included in the argument otherwise returns +nil+. + # Argument must be any object which responds to +#include?+. Usage: + # + # params[:bucket_type].presence_in %w( project calendar ) + # + # This will throw an ArgumentError if the argument doesn't respond to +#include?+. + # + # @return [Object] + def presence_in(another_object) + self.in?(another_object) ? self : nil + end end diff --git a/activesupport/lib/active_support/core_ext/object/json.rb b/activesupport/lib/active_support/core_ext/object/json.rb new file mode 100644 index 0000000000..5496692373 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/object/json.rb @@ -0,0 +1,197 @@ +# Hack to load json gem first so we can overwrite its to_json. +require 'json' +require 'bigdecimal' +require 'active_support/core_ext/big_decimal/conversions' # for #to_s +require 'active_support/core_ext/hash/except' +require 'active_support/core_ext/hash/slice' +require 'active_support/core_ext/object/instance_variables' +require 'time' +require 'active_support/core_ext/time/conversions' +require 'active_support/core_ext/date_time/conversions' +require 'active_support/core_ext/date/conversions' +require 'active_support/core_ext/module/aliasing' + +# The JSON gem adds a few modules to Ruby core classes containing :to_json definition, overwriting +# their default behavior. That said, we need to define the basic to_json method in all of them, +# otherwise they will always use to_json gem implementation, which is backwards incompatible in +# several cases (for instance, the JSON implementation for Hash does not work) with inheritance +# and consequently classes as ActiveSupport::OrderedHash cannot be serialized to json. +# +# On the other hand, we should avoid conflict with ::JSON.{generate,dump}(obj). Unfortunately, the +# JSON gem's encoder relies on its own to_json implementation to encode objects. Since it always +# passes a ::JSON::State object as the only argument to to_json, we can detect that and forward the +# calls to the original to_json method. +# +# It should be noted that when using ::JSON.{generate,dump} directly, ActiveSupport's encoder is +# bypassed completely. This means that as_json won't be invoked and the JSON gem will simply +# ignore any options it does not natively understand. This also means that ::JSON.{generate,dump} +# should give exactly the same results with or without active support. +[Object, Array, FalseClass, Float, Hash, Integer, NilClass, String, TrueClass, Enumerable].each do |klass| + klass.class_eval do + def to_json_with_active_support_encoder(options = nil) + if options.is_a?(::JSON::State) + # Called from JSON.{generate,dump}, forward it to JSON gem's to_json + self.to_json_without_active_support_encoder(options) + else + # to_json is being invoked directly, use ActiveSupport's encoder + ActiveSupport::JSON.encode(self, options) + end + end + + alias_method_chain :to_json, :active_support_encoder + end +end + +class Object + def as_json(options = nil) #:nodoc: + if respond_to?(:to_hash) + to_hash.as_json(options) + else + instance_values.as_json(options) + end + end +end + +class Struct #:nodoc: + def as_json(options = nil) + Hash[members.zip(values)].as_json(options) + end +end + +class TrueClass + def as_json(options = nil) #:nodoc: + self + end +end + +class FalseClass + def as_json(options = nil) #:nodoc: + self + end +end + +class NilClass + def as_json(options = nil) #:nodoc: + self + end +end + +class String + def as_json(options = nil) #:nodoc: + self + end +end + +class Symbol + def as_json(options = nil) #:nodoc: + to_s + end +end + +class Numeric + def as_json(options = nil) #:nodoc: + self + end +end + +class Float + # Encoding Infinity or NaN to JSON should return "null". The default returns + # "Infinity" or "NaN" which are not valid JSON. + def as_json(options = nil) #:nodoc: + finite? ? self : nil + end +end + +class BigDecimal + # A BigDecimal would be naturally represented as a JSON number. Most libraries, + # however, parse non-integer JSON numbers directly as floats. Clients using + # those libraries would get in general a wrong number and no way to recover + # other than manually inspecting the string with the JSON code itself. + # + # That's why a JSON string is returned. The JSON literal is not numeric, but + # if the other end knows by contract that the data is supposed to be a + # BigDecimal, it still has the chance to post-process the string and get the + # real value. + def as_json(options = nil) #:nodoc: + finite? ? to_s : nil + end +end + +class Regexp + def as_json(options = nil) #:nodoc: + to_s + end +end + +module Enumerable + def as_json(options = nil) #:nodoc: + to_a.as_json(options) + end +end + +class Range + def as_json(options = nil) #:nodoc: + to_s + end +end + +class Array + def as_json(options = nil) #:nodoc: + map { |v| options ? v.as_json(options.dup) : v.as_json } + end +end + +class Hash + def as_json(options = nil) #:nodoc: + # create a subset of the hash by applying :only or :except + subset = if options + if attrs = options[:only] + slice(*Array(attrs)) + elsif attrs = options[:except] + except(*Array(attrs)) + else + self + end + else + self + end + + Hash[subset.map { |k, v| [k.to_s, options ? v.as_json(options.dup) : v.as_json] }] + end +end + +class Time + def as_json(options = nil) #:nodoc: + if ActiveSupport.use_standard_json_time_format + xmlschema(ActiveSupport::JSON::Encoding.time_precision) + else + %(#{strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)}) + end + end +end + +class Date + def as_json(options = nil) #:nodoc: + if ActiveSupport.use_standard_json_time_format + strftime("%Y-%m-%d") + else + strftime("%Y/%m/%d") + end + end +end + +class DateTime + def as_json(options = nil) #:nodoc: + if ActiveSupport.use_standard_json_time_format + xmlschema(ActiveSupport::JSON::Encoding.time_precision) + else + strftime('%Y/%m/%d %H:%M:%S %z') + end + end +end + +class Process::Status #:nodoc: + def as_json(options = nil) + { :exitstatus => exitstatus, :pid => pid } + end +end diff --git a/activesupport/lib/active_support/core_ext/object/to_json.rb b/activesupport/lib/active_support/core_ext/object/to_json.rb deleted file mode 100644 index 83cc8066e7..0000000000 --- a/activesupport/lib/active_support/core_ext/object/to_json.rb +++ /dev/null @@ -1,27 +0,0 @@ -# Hack to load json gem first so we can overwrite its to_json. -begin - require 'json' -rescue LoadError -end - -# The JSON gem adds a few modules to Ruby core classes containing :to_json definition, overwriting -# their default behavior. That said, we need to define the basic to_json method in all of them, -# otherwise they will always use to_json gem implementation, which is backwards incompatible in -# several cases (for instance, the JSON implementation for Hash does not work) with inheritance -# and consequently classes as ActiveSupport::OrderedHash cannot be serialized to json. -[Object, Array, FalseClass, Float, Hash, Integer, NilClass, String, TrueClass].each do |klass| - klass.class_eval do - # Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info. - def to_json(options = nil) - ActiveSupport::JSON.encode(self, options) - end - end -end - -module Process - class Status - def as_json(options = nil) - { :exitstatus => exitstatus, :pid => pid } - end - end -end diff --git a/activesupport/lib/active_support/core_ext/object/to_param.rb b/activesupport/lib/active_support/core_ext/object/to_param.rb index 3b137ce6ae..e65fc5bac1 100644 --- a/activesupport/lib/active_support/core_ext/object/to_param.rb +++ b/activesupport/lib/active_support/core_ext/object/to_param.rb @@ -52,7 +52,9 @@ class Hash # This method is also aliased as +to_query+. def to_param(namespace = nil) collect do |key, value| - value.to_query(namespace ? "#{namespace}[#{key}]" : key) - end.sort! * '&' + unless (value.is_a?(Hash) || value.is_a?(Array)) && value.empty? + value.to_query(namespace ? "#{namespace}[#{key}]" : key) + end + end.compact.sort! * '&' end end diff --git a/activesupport/lib/active_support/core_ext/object/to_query.rb b/activesupport/lib/active_support/core_ext/object/to_query.rb index 5d5fcf00e0..37352fa608 100644 --- a/activesupport/lib/active_support/core_ext/object/to_query.rb +++ b/activesupport/lib/active_support/core_ext/object/to_query.rb @@ -18,7 +18,12 @@ class Array # ['Rails', 'coding'].to_query('hobbies') # => "hobbies%5B%5D=Rails&hobbies%5B%5D=coding" def to_query(key) prefix = "#{key}[]" - collect { |value| value.to_query(prefix) }.join '&' + + if empty? + nil.to_query(prefix) + else + collect { |value| value.to_query(prefix) }.join '&' + end end end diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb index 534bbe3c42..48190e1e66 100644 --- a/activesupport/lib/active_support/core_ext/object/try.rb +++ b/activesupport/lib/active_support/core_ext/object/try.rb @@ -47,7 +47,7 @@ class Object end # Same as #try, but will raise a NoMethodError exception if the receiving is not nil and - # does not implemented the tried method. + # does not implement the tried method. def try!(*a, &b) if a.empty? && block_given? yield self |