Methods enabling Database object integration with the json type.
Parse JSON data coming from the database. Since PostgreSQL allows non JSON data in JSON fields (such as plain numbers and strings), we don’t want to raise an exception for that.
# File lib/sequel/extensions/pg_json.rb, line 109 def self.db_parse_json(s) parse_json(s) rescue Sequel::InvalidValue raise unless s.is_a?(String) parse_json("[#{s}]").first end
# File lib/sequel/extensions/pg_json.rb, line 99 def self.extended(db) db.instance_eval do copy_conversion_procs([114, 199]) @schema_type_classes[:json] = [JSONHash, JSONArray] end end
Parse the given string as json, returning either a JSONArray or JSONHash instance, and raising an error if the JSON parsing does not yield an array or hash.
# File lib/sequel/extensions/pg_json.rb, line 119 def self.parse_json(s) begin value = Sequel.parse_json(s) rescue Sequel.json_parser_error_class => e raise Sequel.convert_exception_class(e, Sequel::InvalidValue) end case value when Array JSONArray.new(value) when Hash JSONHash.new(value) else raise Sequel::InvalidValue, "unhandled json value: #{value.inspect} (from #{s.inspect})" end end
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