How can I skip validation for nested_attribute if condition is true
aquarium.rb
has_many :fishes
accepts_nested_attributes_for :fishes,
fish.rb
belongs_to :aquarium
validates :ratio, :numericality => { :greater_than => 0 }, if: :skip_this_validation
then in aquariums_controller.rb
def some_action
@aquarium = Aquarium.new(aqua_params)
@aquarium.skip_this_validation = true # i know that this is not valid
#must skip validation for ratio and then save to DB
end
aquarium.rb
has_many :fishes
accepts_nested_attributes_for :fishes,
attr_accessor :skip_fishes_ratio_validation
fish.rb
belongs_to :aquarium
validates :ratio, :numericality => { :greater_than => 0 }, unless: proc { |f| f.aquarium&.skip_fishes_ratio_validation }
then in aquariums_controller.rb
def some_action
@aquarium = Aquarium.new(aqua_params)
@aquarium.skip_fishes_ratio_validation = true
@aquarium.save
end
You can just add the condition in method and check for the conditional validation
class Fish < ActiveRecord::Base
validates :ratio, :numericality => { :greater_than => 0 }, if: :custom_validation
private
def custom_validation
# some_condition_here
true
end
end
@aquarium.save(validate: false)
I believe skips validations on the model.
In Rails 5 you can simply pass optional: true to the belongs_to association.
So in your fish.rb, update association with the following code:
belongs_to :aquarium, optional: true
It will skip association validation if the fish object has no aquarium.
