undefined method `first_name' for #<Profile id: nil> - ruby-on-rails

Question

Trace: https://i.gyazo.com/6487f4eee162e8c2207d7fdb5fc4ef3b.png
I can't get what's happening, I did the same process with the contact page and everything worked fine. Any ideas?
profile/new.html.erb
<div class="row">
<div class="col-md-6 col-md-offset-3">
<h1 class="text-center">Create Your Profile</h1>
<p class="text-center">Be a part of the DevMatch community and fill out your profile!</p>
<div class="well">
<%= render 'form' %>
</div>
</div>
</div>
profile/_form.html.erb
<%= form_for #profile, url: user_profile_path do |f| %>
<div class="form-group">
<%= f.label :first_name %>
<%= f.text_field :first_name, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.label :last_name %>
<%= f.text_field :last_name, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.label :job_title %>
<%= f.select :job_title, ['Developer', 'Entrepreneur', 'Investor'], {}, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.label :phone_number %>
<%= f.text_field :phone_number, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.label :contact_email %>
<%= f.text_field :contact_email, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.label :description %>
<%= f.text_area :description, class: 'form-control' %>
</div>
<div class="form-group">
<%= f.submit "Update Profile", class: 'btn btn-primary' %>
</div>
<% end %>
schema
create_table "profiles", force: :cascade do |t|
t.integer "user_id"
t.string "first_name"
t.string "last_name"
t.string "job_title"
t.string "phone_number"
t.string "contact_email"
t.text "description"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
Profiles controller
class ProfilesController < ApplicationController
# GET to /users/:user_id/profile/new
def new
# Render blank profile details form
#profile = Profile.new
end
end
I get the rror in the profile creator page. It says the firstname is undefined but I tried deleting it and then it says that the laast name is undefined and so on
If I delete the "<%= render 'form' %>" form the other html, the page loads perfectly, but I need a form and I am trying to learn Ruby. Sorry

Answer 1

undefined method `first_name' for Profile id: nil
It says the firstname is undefined but I tried deleting it and then it
says that the last name is undefined and so on
You didn't have columns in the profiles table. You should run rake db:migrate to migrate the columns which should resolve your problem.
Additionally always make sure your migrations are run properly without any errors You check the status of the pending migrations with rake db:migrate:status