# module ActiveRecord::ConnectionAdapters::PostgreSQL::Quoting

### Public Instance Methods

escape_bytea(value) click to toggle source

Escapes binary strings for bytea input to the database.

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 6
    def escape_bytea(value)
      @connection.escape_bytea(value) if value
    end

quote_schema_name(name) click to toggle source

Quotes schema names for use in SQL queries.

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 35
    def quote_schema_name(name)
      PG::Connection.quote_ident(name)
    end

quote_table_name_for_assignment(table, attr) click to toggle source

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 39
    def quote_table_name_for_assignment(table, attr)
      quote_column_name(attr)
    end

unescape_bytea(value) click to toggle source

Unescapes bytea output from a database to the binary string it represents. NOTE: This is NOT an inverse of #escape_bytea! This is only to be used on escaped binary output from database drive.

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 13
    def unescape_bytea(value)
      @connection.unescape_bytea(value) if value
    end

### Private Instance Methods

_quote(value) click to toggle source
Calls superclass method

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 84
    def _quote(value)
      case value
      when OID::Xml::Data
        "xml '#{quote_string(value.to_s)}'"
      when OID::Bit::Data
        if value.binary?
          "B'#{value}'"
        elsif value.hex?
          "X'#{value}'"
        end
      when Float
        if value.infinite? || value.nan?
          "'#{value}'"
        else
          super
        end
      when OID::Array::Data
        _quote(encode_array(value))
      else
        super
      end
    end

_type_cast(value) click to toggle source
Calls superclass method

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 107
    def _type_cast(value)
      case value
      when Type::Binary::Data
        # Return a bind param hash with format as binary.
        # See https://deveiate.org/code/pg/PG/Connection.html#method-i-exec_prepared-doc
        # for more information
        { value: value.to_s, format: 1 }
      when OID::Xml::Data, OID::Bit::Data
        value.to_s
      when OID::Array::Data
        encode_array(value)
      else
        super
      end
    end

determine_encoding_of_strings_in_array(value) click to toggle source

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 134
    def determine_encoding_of_strings_in_array(value)
      case value
      when ::Array then determine_encoding_of_strings_in_array(value.first)
      when ::String then value.encoding
      end
    end

encode_array(array_data) click to toggle source

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 123
    def encode_array(array_data)
      encoder = array_data.encoder
      values = type_cast_array(array_data.values)

      result = encoder.encode(values)
      if encoding = determine_encoding_of_strings_in_array(values)
        result.force_encoding(encoding)
      end
      result
    end

lookup_cast_type(sql_type) click to toggle source
Calls superclass method

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 80
    def lookup_cast_type(sql_type)
      super(query_value("SELECT #{quote(sql_type)}::regtype::oid", "SCHEMA").to_i)
    end

type_cast_array(values) click to toggle source

    # File lib/active_record/connection_adapters/postgresql/quoting.rb, line 141
    def type_cast_array(values)
      case values
      when ::Array then values.map { |item| type_cast_array(item) }
      else _type_cast(values)
      end
    end