I have a form where i pass a field named :type and i want to check if it's value is inside an array of allowed types so that no one is allowed to post not-allowed types.
the array looks like
@allowed_types = [
'type1',
'type2',
'type3',
'type4',
'type5',
'type6',
'type7',
etc...
]
i have tried using validates_exclusion_of or validates_inclusion_of but it doesn't seem to work
first, change the attribute from type to something else, type is a reserved attrubute name use for Single Table Inheritance and such.
class Thing < ActiveRecord::Base
validates :mytype, :inclusion=> { :in => @allowed_types }
type if you put self.inheritance_column = nil in the model, or in ApplicationRecord if you don't use Single Table Inheritance (STI) at all. We don't use STI (and don't generally recommend it under most circumstances) so that's what we do and appreciate not having to prefix our "type" columns with something.ActiveModel::Validations provides a helper method for this. An example call would be:
validates_inclusion_of :type, in: @allowed_types
ActiveRecord::Base is already a ActiveModel::Validations, so there is no need to include anything.
http://apidock.com/rails/ActiveModel/Validations/HelperMethods/validates_inclusion_of
Also, @RadBrad is correct that you should not use type as a column name as it is reserved for STI.
Just for those lazy people (like me) to copy the latest syntax:
validates :status, inclusion: %w[pending processing succeeded failed]
validates_inclusion_of is out of date since Rails 3.:inclusion=> hash syntax is out of date since Ruby 2.0.%w for word array as the default Rubocop option.With variations:
Default types as a constant:
STATUSES = %w[pending processing succeeded failed]
validates :status, inclusion: STATUSES
OP's original:
validates :mytype, inclusion: @allowed_types
