CODEWITHSUNDEEP
ruby-on-rails-3activerecordmass-assignment
Geoff
Geoff

Reputation: 2228

Rails: Is there an efficient way to get all whitelisted attributes with values?

I'm trying to use a model as a template to create a new model. However, I only want to use the attr_accessible attributes from the template model.

Here's what I'm doing now. It works, but it seems too complex.

def copy_attrs_and_errors(other)
  self.class.attr_accessible[:default].to_a.each do |attr|
    eval("self.#{attr} = other.#{attr}") unless attr.blank?
  end
end

I'd like to be able to say something as simple as:

self.attributes = other.whitelist_attributes(:default)

Thanks.

Upvotes: 0

Views: 531

Answers (1)

phoet
phoet

Reputation: 18845

it's a little crazy, but you could do something like this in a module or whatever:

def self.from_accessible_attributes(other)
  values     = other.attributes.values_at(*other.class.accessible_attributes)
  attributes = Hash[other.class.accessible_attributes.zip(values)]
  new(attributes)
end

Upvotes: 1

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