has_many record insertion - ruby-on-rails

Question

I want to insert tags in new Place. giving that tags is in different model.
####### models ##########
class Tag < ActiveRecord::Base
belongs_to :place
attr_accessible :tag
end
class Place < ActiveRecord::Base
has_many :tags
end
how can I handle this in the new Place create form? and the create action in the places_controller? so that I can insert new place and mant tags then assign the product id to each tag.
####### place controller ##########
def create
#place = Place.new(params[:place])
#tag = Tag.new(params[:?????]) #this should be more than once
respond_to do |format|
if #place.save
format.html { redirect_to #place, notice: 'Place was successfully created.' }
format.json { render json: #place, status: :created, location: #place }
else
format.html { render action: "new" }
format.json { render json: #place.errors, status: :unprocessable_entity }
end
end
end
####### place new form ##########
<%= form_for #place do |f| %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :description %><br />
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.label :rank %><br />
<%= f.text_field :rank %>
</div>
<div class="field">
<%= f.label :lat %><br />
<%= f.text_field :lat %>
</div><div class="field">
<%= f.label :lng %><br />
<%= f.text_field :lng %>
</div>
<div class="field">
<%= f.label :address %><br />
<%= f.text_area :address %>
</div>
<div class="field">
<%= f.label :website %><br />
<%= f.text_field :website %>
</div>
<div class="field">
<%= f.label :phone %><br />
<%= f.text_field :phone %>
</div>
<div class="field">
<%= label_tag "tags" %>
<%= f.text_field :tag %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>

Answer 1

If you want to do it on your own, you should look into accepts_nested_attributes_for, where there's a great 2 part tutorial by Ryan Bates at railscasts.com
If you don't want to do it on your own, there are several tag gems available, for instance:
ActsAsTaggableOn.

Answer 2

Add this in your form:
<%= f.fields_for :tags do |t| %>
<%= t.label :name %>
<%= t.text_field :name %>
<% end %>
And in your Place model:
accepts_nested_attributes_for :tags
And in your controller, you wouldn't even have to worry about creating tags.
You should still try to read about fields_for and accepts_nested_attributes_for, they're often useful, since your problem is very common.