Array of integers is being saved as array of strings

Question

I have this in my template:

<%= f.hidden_field :user_ids, multiple: true, value: 1 %>
<%= f.hidden_field :user_ids, multiple: true, value: 2 %>

On the controllerI have this to make sure that the array is an array of integers. I tested it and it works fine :

before_filter :parse_json_request

  def parse_json_request
    params[:keepcon_settings_users_group][:user_ids] = params[:keepcon_settings_users_group][:user_ids].map(&:to_i) if params[:keepcon_settings_users_group][:user_ids]
  end

The problem is that the data is storing as a yaml but in this format:

---
- '1'
- '2'

And I need it this way:

---
- 1
- 2

My class is:

class UsersGroup < ActiveRecord::Base
  belongs_to :account_setting
  serialize :user_ids, Array
  attr_accessible :name, :user_ids
  after_initialize :set_defaults

  def set_defaults
    if !self.user_ids or self.user_ids == ''
      self.user_ids = []
    end
  end

end

Matt Gibson · Accepted Answer · 2015-06-05 16:18:06Z

3

I think the incoming data from a HTML form is always sent as a string. You can fix it by calling to_i on each of the params like so:

user_ids.map!(&:to_i)

answered Jun 5, 2015 at 16:18

Matt Gibson

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5 Comments

hdk Over a year ago

Im doing that here: params[:keepcon_settings_users_group][:user_ids].map(&:to_i)

Matt Gibson Over a year ago

Oops - didn't see that with the long line! is the conversion working? You could try puts params[:keepcon_settings_users_group][:user_ids].first.class.name on the next line

Matt Gibson Over a year ago

Where is the YAML save happening?

hdk Over a year ago

The problem was the order in which I used the before filter! Thanxs Matt

JosephK Over a year ago

Form hands me this ""1,2" Applied this method and got: undefined method `map!' for "1,2":String

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