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module Locomotive
module Concerns
module Shared
module JsonAttribute
extend ActiveSupport::Concern
module ClassMethods
def json_attribute(name)
validate { |record| record.send(:json_attribute_must_be_valid, name) }
before_validation { |record| record.send(:add_json_parsing_error, name) }
define_method(:"#{name}=") do |json|
super(decode_json(name, json))
end
end
end
private
def decode_json(name, json)
begin
value = json.is_a?(String) ? ActiveSupport::JSON.decode(URI.unescape(json)) : json
instance_variable_set(:"@#{name}_json_parsing_error", nil)
value
rescue ActiveSupport::JSON.parse_error
instance_variable_set(:"@#{name}_json_parsing_error", $!.message)
nil
end
end
def json_attribute_must_be_valid(name)
json = self.send(name)
schema = respond_to?(:"_#{name}_schema", true) ? self.send(:"_#{name}_schema") : {}
return if json.blank?
begin
JSON::Validator.validate!(schema, json)
rescue JSON::Schema::ValidationError
self.errors.add(name, $!.message)
end
end
def add_json_parsing_error(name)
error = instance_variable_get(:"@#{name}_json_parsing_error")
if error
msg = "Invalid #{name}: \"#{error}\". Check it out on http://jsonlint.com"
self.errors.add(name, msg)
end
end
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems