Redirect the editing of nested content - ruby-on-rails

Question

Problem resolve
When I want to edit an existing section an error appears:
"Couldn't find Category with'id' ="
And my page is redirected to "http://localhost:3000/sections/1" when it should be redirected to "http://localhost:3000/categories/3/sections/1/".
sections_controller.rb
class SectionsController < ApplicationController
before_action :find_the_category
def index
#sections = #category.sections
end
def show
#section = #category.sections.find(params[:id])
end
def new
#section = Section.new
end
def edit
#section = #category.sections.find(params[:id])
end
def create
#section = #category.section.create(section_params)
flash[:success] = "Section ajouté avec succés"
if #section.save
redirect_to category_section_path(#category, #section)
end
end
def update
flash[:success] = "Section modifié avec succés"
#section = #category.sections.find(params[:id])
#section.update(section_params)
redirect_to category_section_path(#category, #section)
end
def destroy
flash[:danger] = "Section supprimé"
#section = Section.find(params[:id])
#section.destroy
redirect_to category_sections_path
end
private
def find_the_category
#category = Category.find(params[:category_id])
end
def section_params
params.require(:section).permit(:title, :content)
end
end
routes.rb
Rails.application.routes.draw do
resources :categories do
resources :sections
end
end
section#_form.html.erb
<%= bootstrap_form_for([#category, #section]) do |f| %>
<% if #section.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#section.errors.count, "error") %> prohibited this reponse from being saved:</h2>
<ul>
<% #section.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :Titre %><br>
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :Description %><br>
<%= f.text_area :content %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
category.rb
class Category < ActiveRecord::Base
# une catégorie peut avoir plusieurs questions relations has-many
has_many :questions
has_many :sections
end
section.rb
class Section < ApplicationRecord
belongs_to :category
end

Answer 1

Check your form url in browser, i think it wrong.
You don't provide any category to bootstrap_form_for helper, so it may generate wrong link.
Your form template must be smth like this:
bootstrap_form_for([#category, #section])