diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object')
5 files changed, 209 insertions, 34 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..f9ff4d9567 100644 --- a/activesupport/lib/active_support/core_ext/object/blank.rb +++ b/activesupport/lib/active_support/core_ext/object/blank.rb @@ -90,7 +90,7 @@ class String # ' '.blank? # => true # ' something here '.blank? # => false def blank? - self !~ /[^[:space:]]/ + self =~ /\A[[:space:]]*\z/ end 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/json.rb b/activesupport/lib/active_support/core_ext/object/json.rb new file mode 100644 index 0000000000..1675145ffe --- /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].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(3) + 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(3) + 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 index 83cc8066e7..3dcae6fc7f 100644 --- a/activesupport/lib/active_support/core_ext/object/to_json.rb +++ b/activesupport/lib/active_support/core_ext/object/to_json.rb @@ -1,27 +1,5 @@ -# Hack to load json gem first so we can overwrite its to_json. -begin - require 'json' -rescue LoadError -end +ActiveSupport::Deprecation.warn 'You have required `active_support/core_ext/object/to_json`. ' \ + 'This file will be removed in Rails 4.2. You should require `active_support/core_ext/object/json` ' \ + 'instead.' -# 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 +require 'active_support/core_ext/object/json' 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 |