class Person < ApplicationRecord
validates :name, presence: true
endclass Person < ActiveRecord::Base
has_one :face
validates_presence_of :face
end| Code Example |
|---|
| Ruby :: ruby latest version |
| Ruby :: link to do rails |
| Ruby :: ruby array remove by index |
| Ruby :: ruby get current process id |
| Ruby :: ruby compiler |
| Ruby :: rbenv and ruby different versions |
| Ruby :: rails keep all params except for some |
| Ruby :: ruby delete first element of array |
| Ruby :: ruby class variable |
| Ruby :: run Rspec |
| Ruby :: ruby number of week |
| Ruby :: While executing gem |
| Ruby :: check validate url ruby |
| Ruby :: each_cons with index ruby |
| Ruby :: ruby on rails |
| Ruby :: ruby for programmers |
| Ruby :: map each with index |
| Ruby :: ruby rails check field changed |
| Ruby :: run bundle without production in rails |
| Ruby :: is identation madatory in ruby |
| Ruby :: ruby array serach |
| Ruby :: undefined variable logger rails |
| Ruby :: logstash-logger gem |
| Ruby :: hoow to match a complete word in ruby? |
| R :: r clear variables |
| R :: knnImputation in r |
| R :: merge multiple objects in r |
| R :: ggplot - blank title of axis |
| R :: if not NA in r |
| R :: convert a datetime to date r |