ActiveSupport::HashWithIndifferentAccess Error

edit.html.erb

<h1>PlayersToTeams#edit</h1>
<%= form_for @players_to_teams do |field| %>
    <%= field.fields_for @players_to_teams.player do |f| %>
        <%= f.label :IsActive %>
        <%= f.text_field :IsActive %>
    <% end %>
    <%= field.label :BT %>
    <%= field.text_field :BT %>
    <br/>
    <%= field.submit "Save", class: 'btn btn-primary' %>
<% end %>

error

ActiveRecord::AssociationTypeMismatch in PlayersToTeamsController#update

Player(#70265401931920) expected, got ActiveSupport::HashWithIndifferentAccess(#70265338950760)
Rails.root: /Users/Tyler/Development/Rails/csbb

Application Trace | Framework Trace | Full Trace
app/controllers/players_to_teams_controller.rb:9:in `block in update'
app/controllers/players_to_teams_controller.rb:8:in `update'
Request

Parameters:

{"utf8"=>"✓",
 "_method"=>"put",
 "authenticity_token"=>"16RC1DJZxWlkHpPoUA6d2r8xkTRuZ3IPZgJ2ZQS1FJ8=",
 "players_to_team"=>{"player"=>{"IsActive"=>"0"},
 "BT"=>"throws"},
 "commit"=>"Save",
 "id"=>"82035"}
Show session dump

Show env dump

Response

Headers:

None

player.rb

class Player < ActiveRecord::Base
  has_many :players_to_teams
  has_many :teams, through: :players_to_teams
end

players_to_team.rb

class PlayersToTeam < ActiveRecord::Base
  belongs_to :player
  belongs_to :team

  accepts_nested_attributes_for :player
end

players_to_teams_controller.rb

class PlayersToTeamsController < ApplicationController
  def edit
    @players_to_teams=PlayersToTeam.find(params[:id])
  end

  def update
    @players_to_teams=PlayersToTeam.find(params[:id])
    respond_to do |format|
      if @players_to_teams.update_attributes(params[:players_to_team])
        format.html { redirect_to @players_to_teams, notice: 'Player_to_Team was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @players_to_teams.errors, status: :unprocessable_entity }
      end
    end
  end
end