Why am I getting argument out of range exception - ruby-on-rails

Question

Im a rails beginner on Rails 4. Im trying to create a wine list that takes the name of the winery and the year of the bottle. Here is my form
<%= form_for #wine do |f| %>
<%# render "errors", object: #wine %>
<div class="form-group input-group input-group-lg">
<%= f.text_field :name, placeholder: "Enter the winery name", class: "form-control input-lg" %>
</div>
<div class="form-group input-group input-group-lg">
<%= select_year(Date.today, start_year: Time.now.year, end_year: Time.now.year - 90, field_name: :year, prefix: :wine) %>
</div>
<div class="form_group input-group">
<%= f.submit "Add wine", class: "btn btn-success" %>
</div>
<% end %>
Here is my controller
class WinesController < ApplicationController
before_action :set_wine, only: [:show, :edit, :update, :destroy]
def index
#wines = Wine.all
end
def new
#wine = Wine.new
end
def create
#wine = Wine.new(wine_params)
if #wine.save
flash[:notice] = "Successfully created..."
redirect_to #wine
else
flash.now[:error] = "There was a problem"
render "new"
end
end
def show
end
def edit
end
def update
if #wine.update(wine_params)
redirect_to #wine
else
flash[:error] = "Something went wrong"
render "edit"
end
end
def destroy
#wine.destroy
redirect_to wines_path
end
private
def set_wine
#wine = Wine.find(params[:id])
end
def wine_params
params.require(:wine).permit(:name, :year)
end
end
I have my wines table with a name:string column and a year:datetime column
Whenever I try and create a new wine I get an argument out of range exception and it highlights #wine = Wine.new(wine_params) in my create action. What am I doing wrong?
My log
Started GET "/wines/new" for 127.0.0.1 at 2013-09-04 10:55:54 -0700
Processing by WinesController#new as HTML
Rendered wines/_form.html.erb (2.0ms)
Rendered wines/new.html.erb within layouts/application (2.6ms)
Rendered layouts/_header.html.erb (0.2ms)
Rendered layouts/_footer.html.erb (0.1ms)
Completed 200 OK in 10ms (Views: 9.3ms | ActiveRecord: 0.0ms)
Started GET "/assets/comingsoonbg.png" for 127.0.0.1 at 2013-09-04 10:55:54 -0700
Started GET "/wines/new" for 127.0.0.1 at 2013-09-04 10:55:54 -0700
Processing by WinesController#new as HTML
Rendered wines/_form.html.erb (2.1ms)
Rendered wines/new.html.erb within layouts/application (2.7ms)
Rendered layouts/_header.html.erb (0.2ms)
Rendered layouts/_footer.html.erb (0.1ms)
Completed 200 OK in 10ms (Views: 9.8ms | ActiveRecord: 0.0ms)
Started POST "/wines" for 127.0.0.1 at 2013-09-04 10:55:59 -0700
Processing by WinesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"FCd3wvCov+mugnJuzwplKD/eVskJKgxweh1mK0pG2wM=", "wine"=>{"name"=>"kjkljhk", "year"=>"2013"}, "commit"=>"Add wine"}
Completed 500 Internal Server Error in 1ms
ArgumentError (argument out of range):
app/controllers/wines_controller.rb:13:in `create'
Rendered /Users/me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.7ms)
Rendered /Users/me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (0.9ms)
Rendered /Users/me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.9ms)
Rendered /Users/me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (16.2ms)
My schema for wines in schema.rb
create_table "wines", force: true do |t|
t.datetime "year"
t.datetime "created_at"
t.datetime "updated_at"
t.string "name"
end

Answer 1

Date and Time always require me to think twice! In the log, params contains a string with the year from the select_year. The simplest solution was to just store the integer representation, if all you'll need are years. If you later change to select_date, you'll need to build a Date object in your controller by extracting the parts from the params hash. See Form Helpers Guide for more detail... well, here is just a bit.
In the view:
<%= select_date Date.today, prefix: :start_date %>
In the controller, to make your Date object:
Date.civil(params[:start_date][:year].to_i, params[:start_date][:month].to_i, params[:start_date][:day].to_i)
ActiveRecord expects an attribute to have one entry in the params hash, but Date objects require multiple values. The date helper date_select (not select_date) will pass back a hash that Rails will convert, with multiparameter assignment, to a Date during mass assignment.
<%= date_select :person, :birth_date %>
If you used date_select, you's see something like this in the params hash:
{:person => {'birth_date(1i)' => '2008', 'birth_date(2i)' => '11', 'birth_date(3i)' => '22'}}
Notice the keys in the :person hash describe the order and type of the multipart object so that Rails can figure out how to create the attribute (for example, the hash key birth_date(2i) is the second component of the birth_date attribute in a Person model object and is an integer).