NoMethodError (undefined method `User' for #<User:0x00000002586a68>): - ruby-on-rails

Question

When I add the validates before my case it works normal, but add the validates after give me a error
Started POST "/users" for 106.37.100.61 at 2018-08-20 07:19:33 +0000
Cannot render console from 106.37.100.61! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
(0.2ms) SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by UsersController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"UrrKnE8xR9phK4WEdyrgxgJSItgopSno2ZfyTHC1AIKG3WEs4iE17gDzp5xGzxXSrLG0cqOPP1cht7AvOSQMqQ==", "user"=>{"name"=>"", "email"=>""}, "commit"=>"Create User"}
(0.1ms) begin transaction
(0.1ms) rollback transaction
Completed 500 Internal Server Error in 25ms (ActiveRecord: 0.8ms)
NoMethodError (undefined method `User' for #):
app/controllers/users_controller.rb:31:in 'block in create'
app/controllers/users_controller.rb:30:in 'create'
This is my model:
class User < ApplicationRecord
has_many :microposts
validates :name, presence: true
validates :email, presence: true
end
My controller:
class UsersController < ApplicationController
before_action :set_user, only: [:show, :edit, :update, :destroy]
before_action :set_user_micropost, only: [:show, :edit, :update, :destroy]
# GET /users
# GET /users.json
def index
#users = User.all
end
# GET /users/1
# GET /users/1.json
def show
end
# GET /users/new
def new
#user = User.new
end
# GET /users/1/edit
def edit
end
# POST /users
# POST /users.json
def create
#user = User.new(user_params)
respond_to do |format|
if #user.save
format.html { redirect_to #user, notice: 'User was successfully created.' }
format.json { render :show, status: :created, location: #user }
else
format.html { render :new }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /users/1
# PATCH/PUT /users/1.json
def update
respond_to do |format|
if #user.update(user_params)
format.html { redirect_to #user, notice: 'User 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
# DELETE /users/1
# DELETE /users/1.json
def destroy
#user.destroy
respond_to do |format|
format.html { redirect_to users_url, notice: 'User was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_user
#user = User.find(params[:id])
end
def set_user_micropost
#microposts = #user.microposts
end
# Never trust parameters from the scary internet, only allow the white list through.
def user_params
params.require(:user).permit(:name, :email)
end
end

Answer 1

I know what happen for this
validates :name, presence: true
validates :email, presence: true
I change the model in user.rb file
It works