Default Values in Rails - Active Record after_initialize

Asked Feb 09 '16 at 08:21

Active Feb 09 '16 at 08:24

Viewed 86 times

Does anyone know why in Rails 4.x, the ||= operator doesn't seem to work properly with defaulting Strings.

fails:

self.scheme ||= "https"

with an error of:

NoMethodError:
undefined method `scheme' for

works:

after_initialize :apply_defaults

def apply_defaults
    #remote Docker daemons use HTTPS by default
    self.scheme
    #default port for docker daemons
    self.port ||= 2376
end

#for some reason, can't use ||= and need a real method
def scheme
    self[:scheme] || 'https'
end

why is it that to have a default string I need a method, but the port (integer) does not?

source: How to set default values in Rails?

edited May 23 '17 at 12:15

Community

asked Feb 09 '16 at 08:21

roguequery

1

The problem seems to be a missing `scheme` method, not the string argument or a buggy operator. – Stefan Feb 09 '16 at 08:55
Don't set defaults after initialize – Richard Peck Feb 09 '16 at 09:17
Do you have a database field "scheme" in that table? – Max Williams Feb 09 '16 at 09:43
Yes I've got scheme set on the model. What's the proper way to have defaults? add them to the migration? – roguequery Feb 09 '16 at 13:12

Default Values in Rails - Active Record after_initialize

0 Answers0