Hi,
I am using mongoid 4.0.0.alpha2 (commit `e7aef3bc79`)
I have a model with a column with the type Integer.

class FeedProduct
  include Mongoid::Document
  field :e,   as: :ean,                   type: Integer
end

When I set the attribute with a String that has a dot, Mongoid sets it to 0, which at least to me is unexpected behaviour.:

>> FeedProduct.new(ean: "713132333822.")
=> #<FeedProduct _id: fff7cce20000eff7d3ccbbf8, e(ean): 0>

If the string has just numbers it works correctly.

This solves the problem:

  def ean=(new_ean)
    write_attribute(:ean, new_ean.try(:to_i))
  end

Is this a known issue? expected behaviour?