Rails Not able to save data, association - ruby-on-rails

Question

I'm doing a parking permit website. The problem I met is that I'm not able to save my data to the PERMIT database which associated with the USER database. The problem i think is I didn't bring the user to the permit(Maybe i missed something). I found out the error when I trying to save from Permit.errors.full_messages is ["User must exist"]. Any help is appreciated, Thank you!
Schema.rb
ActiveRecord::Schema.define(version: 20160920143651) 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.string "duration"
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
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.string :duration
t.date :permitstart
t.date :permitend
t.references :user, foreign_key: true
t.timestamps
end
add_index :permits, :user_id
end
end
Permit_controller
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 #permits
else
redirect_to contact_path
end
end
def destroy
Permit.destroy_all(user_id: 1)
respond_to do |format|
format.html { redirect_to users_url, notice: 'Permit was successfully canceled.' }
format.json { head :no_content }
end
end
def show
#permits = Permit.find(params[:id])
end
def update
respond_to do |format|
if #permits.update(user_params)
format.html { redirect_to #user, notice: 'Permit was successfully updated.' }
format.json { render :show, status: :ok, location: #user }
else
format.html { render :edit }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
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, :duration, :permitstart, :permitend)
end
end
user.rb
class User < ApplicationRecord
has_many :permits
has_secure_password
end
Permit.rb
class Permit < ApplicationRecord
belongs_to :user
end
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>

Answer 1

I guess you are using Rails 5. The problem is you have belongs_to association on permit that is belongs to user but while creating permit you are not associating any user with it and in Rails 5 it is mandatory to assign data to belongs_to association i.e you can not save permit when it don't have user_id so try to assign a user_id to permit. refer this for change to rails 5 belongs_to association

Answer 2

Where exactly is your error ? If in update action, you have to change your before_action. You must add there :update action.
before_action :set_permit, only: [:show, :destroy, :update]