Using a form_for to create a nested model row - ruby-on-rails

Question

Each "User" has one "Move".
Each "Move" has many "Neighborhood Preferences".
I want to create a form on the "/user/(:id)/edit" page that lets a person edit their "move", and "neighborhood_preferences".
Currently, the form displays correctly. But when I submit the form, I get this error Move(#2168853040) expected, got ActionController::Parameters(#2158484920).
How can I save both a new move, and the neighborhood_preferences?
View for Users#edit
<%= form_for(#user) do |f| %>
<%= hidden_field_tag "user[move][neighborhood_ids][]", nil %>
<% #neighborhoods.each do |n| %>
<%= check_box_tag "user[move][neighborhood_ids][]",
n.id, # the value to submit
#user.move.neighborhood_ids.include?(n.id), # Check the box on load
id: dom_id(n) # add a unique category based on the object
%>
<%= label_tag dom_id(n), n.name %>
<br/>
<% end %>
<%= f.submit "Save Changes" %>
<% end %>
Controller for Users#edit
def edit
#user = User.find(params[:id])
#neighborhoods = Neighborhood.all
end
private
def user_params
params.require(:user).permit(
:email,
:age,
:gender,
:university,
:grad_year,
:occupation,
:company,
# Allow form to submit neighborhood_ids for a user's move.
move: [neighborhood_ids: []]
)
end
Models
class User < ActiveRecord::Base
# attr_accessible :provider, :uid, :name, :email
validates_presence_of :name
has_one :move
accepts_nested_attributes_for :move, allow_destroy: true
class Move < ActiveRecord::Base
belongs_to :user
has_many :neighborhood_preferences
has_many :neighborhoods, through: :neighborhood_preferences
accepts_nested_attributes_for :neighborhood_preferences, allow_destroy: true
end
class NeighbhoodPreference < ActiveRecord::Base
belongs_to :neighborhood
belongs_to :move
end