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module ActiveRecord
module ConnectionAdapters
class PostgreSQLColumn < Column
module Cast
def point_to_string(point)
"(#{point[0]},#{point[1]})"
end
def string_to_point(string)
if string[0] == '(' && string[-1] == ')'
string = string[1...-1]
end
string.split(',').map{ |v| Float(v) }
end
def string_to_time(string)
return string unless String === string
case string
when 'infinity'; 1.0 / 0.0
when '-infinity'; -1.0 / 0.0
when / BC$/
super("-" + string.sub(/ BC$/, ""))
else
super
end
end
def string_to_bit(value)
case value
when /^0x/i
value[2..-1].hex.to_s(2) # Hexadecimal notation
else
value # Bit-string notation
end
end
def hstore_to_string(object)
if Hash === object
object.map { |k,v|
"#{escape_hstore(k)}=>#{escape_hstore(v)}"
}.join ','
else
object
end
end
def string_to_hstore(string)
if string.nil?
nil
elsif String === string
Hash[string.scan(HstorePair).map { |k,v|
v = v.upcase == 'NULL' ? nil : v.gsub(/\A"(.*)"\Z/m,'\1').gsub(/\\(.)/, '\1')
k = k.gsub(/\A"(.*)"\Z/m,'\1').gsub(/\\(.)/, '\1')
[k,v]
}]
else
string
end
end
def json_to_string(object)
if Hash === object || Array === object
ActiveSupport::JSON.encode(object)
else
object
end
end
def array_to_string(value, column, adapter, should_be_quoted = false)
casted_values = value.map do |val|
if String === val
if val == "NULL"
"\"#{val}\""
else
quote_and_escape(adapter.type_cast(val, column, true))
end
else
adapter.type_cast(val, column, true)
end
end
"{#{casted_values.join(',')}}"
end
def range_to_string(object)
from = object.begin.respond_to?(:infinite?) && object.begin.infinite? ? '' : object.begin
to = object.end.respond_to?(:infinite?) && object.end.infinite? ? '' : object.end
"[#{from},#{to}#{object.exclude_end? ? ')' : ']'}"
end
def string_to_json(string)
if String === string
ActiveSupport::JSON.decode(string)
else
string
end
end
def string_to_cidr(string)
if string.nil?
nil
elsif String === string
begin
IPAddr.new(string)
rescue ArgumentError
nil
end
else
string
end
end
def cidr_to_string(object)
if IPAddr === object
"#{object.to_s}/#{object.instance_variable_get(:@mask_addr).to_s(2).count('1')}"
else
object
end
end
def string_to_array(string, oid)
parse_pg_array(string).map{|val| oid.type_cast val}
end
private
HstorePair = begin
quoted_string = /"[^"\\]*(?:\\.[^"\\]*)*"/
unquoted_string = /(?:\\.|[^\s,])[^\s=,\\]*(?:\\.[^\s=,\\]*|=[^,>])*/
/(#{quoted_string}|#{unquoted_string})\s*=>\s*(#{quoted_string}|#{unquoted_string})/
end
def escape_hstore(value)
if value.nil?
'NULL'
else
if value == ""
'""'
else
'"%s"' % value.to_s.gsub(/(["\\])/, '\\\\\1')
end
end
end
def quote_and_escape(value)
case value
when "NULL", Numeric
value
else
"\"#{value.gsub(/"/,"\\\"")}\""
end
end
end
end
end
end
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