Can't save my data into sqlite database

I trying to implement a Parking Permit application page using ROR. I couldn't get my data save into the database which the permit database is associated with the user. The program won't save the data and execute the else statement. There is no error generated, i think i have missed something but i don't know the exact problem. Any helps are appreciated!

Permit_controller.rb

class PermitsController < ApplicationController
  before_action :set_permit, only: [:show, :destroy]
  def index
    @permits = Permit.all
  end

  def new
    @permits = Permit.new
  end

  def create
    @permits = Permit.new(permit_params)
    if @permits.save
      redirect_to root_path
    else
      redirect_to contact_path
    end
  end

  def destroy
  end

  def show
    @permits = Permit.find(params[:id])
  end
  private
  # Use callbacks to share common setup or constraints between actions.
  def set_permit
    @permits = Permit.find(params[:id])
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def permit_params
    params.require(:permit).permit(:vehicle_type, :name, :studentid, :department, :carplate,:permitstart, :permitend)
  end
end

Permit.rb

class Permit < ApplicationRecord
  belongs_to :user
end

Create_permit.rb

class CreatePermits < ActiveRecord::Migration[5.0]
  def change
    create_table :permits do |t|
      t.string :vehicle_type
      t.string :name
      t.string :studentid
      t.string :department
      t.string :carplate
      t.date :permitstart
      t.date :permitend
      t.references :user, foreign_key: true

      t.timestamps
    end
    add_foreign_key :permits, :user
    add_index :permits, [:user_id, :created_at]
  end
end

User.rb

    class User < ApplicationRecord
      has_secure_password
      has_many :permits
    end

    #book pg 264 Validation

permit/new.html.erb
<% provide(:title, 'New Permit') %>
<h1>Permit Application</h1>

<div class="row">
  <div class="col-md-6 col-md-offset-3">
    <%= form_for(@permits) do |f| %>

        <%= f.label :"Vehicle" %>
        <%= f.text_field :vehicle_type, class: 'form-control' %>

        <%= f.label :"License Plate" %>
        <%= f.text_field :carplate, class: 'form-control' %>

        <%= f.label :"Student ID" %>
        <%= f.text_field :studentid, class: 'form-control' %>

        <%= f.label :name %>
        <%= f.text_field :name, class: 'form-control' %>

        <%= f.label :"Department of applicant" %>
        <%= f.text_field :department, class: 'form-control' %>

        <%= f.label :permit_start %>
        <%= f.date_select :permitstart, class: 'form-control' %>

        <%= f.label :permit_end %>
        <%= f.date_select :permitend,  class: 'form-control'  %>


        <%= f.submit "Submit", class: "btn btn-primary" %>
    <% end %>
  </div>
</div>

schema.rb

ActiveRecord::Schema.define(version: 20160921071908) do


  create_table "permits", force: :cascade do |t|
    t.string   "vehicle_type"
    t.string   "name"
    t.string   "studentid"
    t.string   "department"
    t.string   "carplate"
    t.date     "permitstart"
    t.date     "permitend"
    t.integer  "user_id"
    t.datetime "created_at",   null: false
    t.datetime "updated_at",   null: false
    t.index ["user_id"], name: "index_permits_on_user_id"
  end

  create_table "users", force: :cascade do |t|
    t.string   "name"
    t.string   "email"
    t.datetime "created_at",      null: false
    t.datetime "updated_at",      null: false
    t.string   "password_digest"
    t.integer  "user_type"
  end

end