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 141 def self.db_parse_json(s) parse_json(s) rescue Sequel::InvalidValue raise unless s.is_a?(String) parse_json("[#{s}]").first end
Same as ::db_parse_json, but consider the input as jsonb.
# File lib/sequel/extensions/pg_json.rb, line 149 def self.db_parse_jsonb(s) parse_json(s, true) rescue Sequel::InvalidValue raise unless s.is_a?(String) parse_json("[#{s}]").first end
# File lib/sequel/extensions/pg_json.rb, line 130 def self.extended(db) db.instance_eval do copy_conversion_procs([114, 199, 3802, 3807]) @schema_type_classes[:json] = [JSONHash, JSONArray] @schema_type_classes[:jsonb] = [JSONBHash, JSONBArray] 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 159 def self.parse_json(s, jsonb=false) 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 (jsonb ? JSONBArray : JSONArray).new(value) when Hash (jsonb ? JSONBHash : JSONHash).new(value) else raise Sequel::InvalidValue, "unhandled json value: #{value.inspect} (from #{s.inspect})" end end
Handle json[] types in bound variables.
# File lib/sequel/extensions/pg_json.rb, line 189 def bound_variable_array(a) case a when JSONHashBase, JSONArrayBase "\"#{Sequel.object_to_json(a).gsub('"', '\\"')}\"" else super end end
Make the column type detection recognize the json type.
# File lib/sequel/extensions/pg_json.rb, line 199 def schema_column_type(db_type) case db_type when 'json' :json when 'jsonb' :jsonb else super end end
Convert the value given to a JSONArray or JSONHash
# File lib/sequel/extensions/pg_json.rb, line 211 def typecast_value_json(value) case value when JSONArray, JSONHash value when Array JSONArray.new(value) when Hash JSONHash.new(value) when JSONBArray JSONArray.new(value.to_a) when JSONBHash JSONHash.new(value.to_hash) when String JSONDatabaseMethods.parse_json(value) else raise Sequel::InvalidValue, "invalid value for json: #{value.inspect}" end end
Convert the value given to a JSONBArray or JSONBHash
# File lib/sequel/extensions/pg_json.rb, line 231 def typecast_value_jsonb(value) case value when JSONBArray, JSONBHash value when Array JSONBArray.new(value) when Hash JSONBHash.new(value) when JSONArray JSONBArray.new(value.to_a) when JSONHash JSONBHash.new(value.to_hash) when String JSONDatabaseMethods.parse_json(value, true) else raise Sequel::InvalidValue, "invalid value for jsonb: #{value.inspect}" end end