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lulalala / banner.rb
Last active January 14, 2019 12:58 — forked from matheusvetor/banner.rb
Carrierwave image model validation on image dimensions/height/width.
class Banner < ActiveRecord::Base
attr_accessor :image_width, :image_height
mount_uploader :image, ImageUploader
validate :check_dimensions, :on => :create
def check_dimensions
if !image_cache.nil? && (image.width < 300 || image.height < 300)
errors.add :image, "Dimension too small."
lulalala / ConditionalValidations.rb
Last active December 17, 2015 13:39 — forked from ibanez270dx/ConditionalValidations.rb
Add association conditional validation
# At CoverHound, we use conditional validations all over the form. However, there is no proper way to do
# this in Rails. Instead, we can provide an array of attributes (validated_fields attribute)
# and ensure they are the only ones to get validated.
module ConditionalValidations
attr_accessor :validated_fields
def field_is_required?(field)