664552ac02
Update to latest Rails. A little bit of jiggery-pokery is involved, since they neglected to re-include vendored Rack in this release.
57 lines
1.8 KiB
Ruby
57 lines
1.8 KiB
Ruby
require 'active_support/core_ext/array/wrapper'
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class Hash
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# Returns a JSON string representing the hash.
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#
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# Without any +options+, the returned JSON string will include all
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# the hash keys. For example:
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#
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# { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json
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# # => {"name": "Konata Izumi", "1": 2, "age": 16}
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#
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# The keys in the JSON string are unordered due to the nature of hashes.
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#
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# The <tt>:only</tt> and <tt>:except</tt> options can be used to limit the
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# attributes included, and will accept 1 or more hash keys to include/exclude.
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#
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# { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json(:only => [:name, 'age'])
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# # => {"name": "Konata Izumi", "age": 16}
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#
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# { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json(:except => 1)
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# # => {"name": "Konata Izumi", "age": 16}
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#
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# The +options+ also filter down to any hash values. This is particularly
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# useful for converting hashes containing ActiveRecord objects or any object
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# that responds to options in their <tt>to_json</tt> method. For example:
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#
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# users = User.find(:all)
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# { :users => users, :count => users.size }.to_json(:include => :posts)
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#
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# would pass the <tt>:include => :posts</tt> option to <tt>users</tt>,
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# allowing the posts association in the User model to be converted to JSON
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# as well.
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def to_json(options = nil) #:nodoc:
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hash = as_json(options)
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result = '{'
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result << hash.map do |key, value|
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"#{ActiveSupport::JSON.encode(key.to_s)}:#{ActiveSupport::JSON.encode(value, options)}"
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end * ','
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result << '}'
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end
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def as_json(options = nil) #:nodoc:
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if options
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if attrs = options[:except]
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except(*Array.wrap(attrs))
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elsif attrs = options[:only]
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slice(*Array.wrap(attrs))
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else
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self
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end
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else
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self
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end
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end
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end
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