index.html.erb

<p id="notice"><%= notice %></p>
<h1>All Questions</h1>
<div class="questions-orders">
    <%= sort_link(@q, :title) %>
    <%= sort_link(@q, :created_at, "Created") %>
    <%= sort_link(@q, :cached_votes_score, "Hearts") %>
</div>

<%= search_form_for @q do |f| %>

  <%= f.label :description %>
  <%= f.search_field :description_or_title_or_comments_content_cont%>

  <%= f.submit %>
<% end %>

 <% @posts_s.each do |post| %>
        
        <p><%= post.description %></p>
        <h1><%= time_ago_in_words(post.created_at) %></h1>
        <%= link_to like_post_path(post), class: "like", method: :put do %>
        <i class="fa fa-heart main-question-icon">
        </i>
        <% end %>
        <span class="number-of-votes">
 <%= post.votes_for.size %>
</span>
        <%= link_to 'Show', post %>
        <% if current_user.id == post.user_id %>
            <%= link_to 'Edit', edit_post_path(post) %>
            <%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %>
        <% end %>
      
    <% end %>

posts_controller.rb

class PostsController < ApplicationController
  before_action :set_post, only: [:show, :edit, :update, :destroy, :upvote, :downvote]
  before_action :authenticate_user!
  before_action :correct_user, only: [:edit]
  # GET /posts
  # GET /posts.json
  def index
    @posts = Post.all
    @q = Post.ransack(params[:q])
    @posts_s = @q.result(distinct: true)
    @comments = @q.result.includes(:comments).page(params[:page])
  end

  # GET /posts/1
  # GET /posts/1.json
  def show
    @post = Post.find(params[:id])
  end

  # GET /posts/new
  def new
    @post = Post.new
    @groups = Group.all
  end

  # GET /posts/1/edit
  def edit
  end

  # POST /posts
  # POST /posts.json
  def create
    @post = current_user.posts.build(post_params)
    if @post.save
       redirect_to root_path 
       flash[:success] = 'Post was successfully created.'
    else
      render :new
    end
  end

  # PATCH/PUT /posts/1
  # PATCH/PUT /posts/1.json
  def update
    respond_to do |format|
      if @post.update(post_params)
        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
        format.json { render :show, status: :ok, location: @post }
      else
        format.html { render :edit }
        format.json { render json: @post.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /posts/1
  # DELETE /posts/1.json
  def destroy
    @post.destroy
    respond_to do |format|
      format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  def upvote
    @post.upvote_from current_user
    redirect_to post_path(@post)
  end

  def downvote
    @post.downvote_from current_user
    redirect_to post_path(@post)
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_post
      @post = Post.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def post_params
      params.require(:post).permit(:description, :title, :user_id, :group_id, :image)
    end

    def correct_user
     @right_post = Post.find(params[:id])
     @user_id = @right_post.user_id
     redirect_to root_path unless current_user.id == @right_post.user_id
    end
end