Validations on array checkbox in Model

Rails
1

Hi,

I am using array ‘sub_id[]’ for multiple checkbox,
i want to place validations on all array ‘sub_ids[]’ checbox in model
just
like other validations.

<% for e in @subjects do -%>
<input type=“checkbox” name=“sub_ids[]” id="<%= e.id %>" value="<%=
e.id%>"<% if @book.subjects.include? e %> checked=“checked”<%end%>>
<%= e.name %>
<% end %>

MODEL

class Book < ActiveRecord::Base
has_and_belongs_to_many :subjects
validates_presence_of:title
validates_numericality_of:price
validate :at_least_one_checkbox_was_ticked

protected
def at_least_one_checkbox_was_ticked
unless params[:sub_ids[]].nil?
end
end

end

I’m using only two models book and subject.

thanx in adv.

2

On 7 Nov 2008, at 12:50, babar wrote:

%= e.id %>"<% if @book.subjects.include? e %> checked=“checked”<%end
validates_presence_of:title
validates_numericality_of:price
validate :at_least_one_checkbox_was_ticked

protected
def at_least_one_checkbox_was_ticked
unless params[:sub_ids[]].nil?
end
end

That’s not how you could do it. You don’t validate against
params[:sub_ids], you validate against a property of the model (ie
subjects.size)

Fred