How do I capture select value from dropdown menu in rails? - ruby-on-rails-5

Question

I have cities table and profiles table. Below is the models of both:
class City < ActiveRecord::Base
belongs_to :profile
end
class Profile < ActiveRecord::Base
belongs_to :user
has_one :city
end
I am trying to create a dropdown list for cities in profile view page.
<%= form_for #profile, url: user_profile_path, :html => { :multipart => true} do |f| %>
<div class="field">
<%= f.label :country %>
<%= f.text_field :country %>
</div>
<div class="field">
<%= f.label :city_id %>
<%= f.select :city_id, options_for_select(#city.collect{ |u| [u.name, u.id] }) %>
</div>
<div class="actions">
<%= f.submit "Update Profile" %>
</div>
<% end %>
Here is the ProfilesController:
class ProfilesController < ApplicationController
def new
#user = User.find( params[:user_id] )
#profile = Profile.new
#city = City.all
end
def create
#user = User.find( params[:user_id] )
#profile = #user.build_profile(profile_params)
if #profile.save
flash[:success] = "Profile Updated!"
redirect_to user_path( params[:user_id] )
else
render action: :new
end
end
end
How do I add city_id column in the profiles table, I am unable to capture city_id from the above ProfilesController.
I tried to #city = City.find( params[:city_id] ) in "ProfilesController",
"Def create", and I got this error:
Couldn't find City with 'id'=
Please advice.

Answer 1

Maybe try to replace
has_one :city
by
belongs_to :city
in your profile model and in your city model replace
belongs_to :profile
by
has_many :profiles

Answer 2

try whitelisting city_id instead of city
private def profile_params
params.require(:profile).permit(:country, :city)
end
Change you associations-
class City < ActiveRecord::Base
has_one :profile
end
class Profile < ActiveRecord::Base
belongs_to :user
belongs_to :city
end
city_id column should be in that model where you are using belongs_to association