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Contents
module ActiveGraph
module Node
# This mixin replace the original save method and performs validation before the save.
module Validations
extend ActiveSupport::Concern
include ActiveGraph::Shared::Validations
# @return [Boolean] true if valid
def valid?(context = nil)
context ||= (new_record? ? :create : :update)
super(context)
errors.empty?
end
module ClassMethods
def validates_uniqueness_of(*attr_names)
validates_with UniquenessValidator, _merge_attributes(attr_names)
end
end
class UniquenessValidator < ::ActiveModel::EachValidator
def initialize(options)
super(options.reverse_merge(case_sensitive: true))
end
def validate_each(record, attribute, value)
return unless found(record, attribute, value).exists?
record.errors.add(attribute, :taken, **options.except(:case_sensitive, :scope).merge(value: value))
end
def found(record, attribute, value)
scopes, attributes = Array(options[:scope] || []).partition { |s| s.is_a?(Proc) }
conditions = scope_conditions(record, attributes)
# TODO: Added as find(:name => nil) throws error
value = '' if value.nil?
conditions[attribute] = options[:case_sensitive] ? value : /#{Regexp.escape(value.to_s)}/i
found = if scopes.empty?
record.class.as(:result)
else
scopes.reduce(record) { |proxy, scope| proxy.instance_eval(&scope) }
end.where(conditions)
found = found.where_not(neo_id: record.neo_id) if record._persisted_obj
found
end
def message(instance)
super || 'has already been taken'
end
def scope_conditions(instance, attributes)
attributes.inject({}) do |conditions, key|
conditions.merge(key => instance[key])
end
end
end
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems