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module ActiveRecord
module ConnectionAdapters
class PostgreSQLColumn < Column
module Cast
def string_to_time(string)
return string unless String === string
case string
when 'infinity'; 1.0 / 0.0
when '-infinity'; -1.0 / 0.0
else
super
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(/^"(.*)"$/,'\1').gsub(/\\(.)/, '\1')
k = k.gsub(/^"(.*)"$/,'\1').gsub(/\\(.)/, '\1')
[k,v]
}]
else
string
end
end
def json_to_string(object)
if Hash === object
ActiveSupport::JSON.encode(object)
else
object
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
IPAddr.new(string)
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
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
end
end
end
end
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