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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 8
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 37
def quote_schema_name(name)
  PG::Connection.quote_ident(name)
end
quote_table_name_for_assignment(table, attr) click to toggle source
# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 41
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 15
def unescape_bytea(value)
  @connection.unescape_bytea(value) if value
end

Private Instance Methods

_quote(value) click to toggle source
Calls superclass method
# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 86
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 109
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 136
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 125
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 82
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 activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 143
def type_cast_array(values)
  case values
  when ::Array then values.map { |item| type_cast_array(item) }
  else _type_cast(values)
  end
end