rails search機能を導入しているのですがNoMethodErrorが発生してしまいます　初心者のため見落としかもしれません

NoMethodError in Posts#search
Showing /Users/app/views/posts/index.html.erb where line #41 raised:

undefined method `[]' for nil:NilClass

@output_buffer.safe_append='          '.freeze;@output_buffer.append=( @post_like_count[post.id] );@output_buffer.safe_append='          
                                                                                       ^^^^^^^^^

<%= @post_like_count[post.id] %>   

NoMethodError in Posts#search
Showing /Users/app/views/posts/index.html.erb where line #47 raised:

undefined method `total_pages' for #<ActiveRecord::Relation [#<Post id: 2, content: "asdfaadaa", title: "dsfa", created_at: "2023-02-24 21:57:19.528378000 +0900", updated_at: "2023-02-24 21:57:19.528378000 +0900", user_id: 1>, #<Post id: 4, content: "asdfafsd", title: "dfadf", created_at: "2023-02-27 15:59:41.620757000 +0900", updated_at: "2023-02-27 15:59:41.620757000 +0900", user_id: 1>, #<Post id: 6, content: "fasdf", title: "fasdfa", created_at: "2023-03-02 14:42:46.430446000 +0900", updated_at: "2023-03-02 14:42:46.430446000 +0900", user_id: 1>, #<Post id: 7, content: "asdfa", title: "fasdf", created_at: "2023-03-02 14:42:50.782476000 +0900", updated_at: "2023-03-02 14:42:50.782476000 +0900", user_id: 1>, #<Post id: 8, content: "fasdfsas", title: "dsafsd", created_at: "2023-03-02 14:42:53.704776000 +0900", updated_at: "2023-03-02 14:42:53.704776000 +0900", user_id: 1>, #<Post id: 9, content: "asdf", title: "fasdfa", created_at: "2023-03-02 14:42:56.302068000 +0900", updated_at: "2023-03-02 14:42:56.302068000 +0900", user_id: 1>, #<Post id: 11, content: "fasdfa", title: "sadfa", created_at: "2023-03-02 14:43:03.934720000 +0900", updated_at: "2023-03-02 14:43:03.934720000 +0900", user_id: 1>, #<Post id: 12, content: "adsfsaf", title: "fasdf", created_at: "2023-03-02 14:43:09.533745000 +0900", updated_at: "2023-03-02 14:43:09.533745000 +0900", user_id: 1>, #<Post id: 13, content: "adasfasdfasdf", title: "fasdf", created_at: "2023-03-02 14:43:15.077459000 +0900", updated_at: "2023-03-02 14:43:15.077459000 +0900", user_id: 1>, #<Post id: 14, content: "adasfasdfasdf", title: "fasdf", created_at: "2023-03-02 14:43:15.287900000 +0900", updated_at: "2023-03-02 14:43:15.287900000 +0900", user_id: 1>, ...]>

<%= paginate @posts %>

  <div class="search">
    <%= form_with url: searches_path, method: :get, local: true do |f| %>
      <%= f.text_field :keyword, placeholder: "\uf002 企画を検索", value: @keyword, class: "fa search-input"%>
      <%= f.submit "\uf002", class: "fa search-submit" %>
    <% end %>
 </div>
〜省略〜
    <% @posts.each do |post| %>
      <div class="posts-index-item">
        <div class="post-left">

        <% if post.user.avatar? %>
          <%= link_to (image_tag post.user.avatar_url), "/users/#{post.user.id}" %>
        <% else %>      
          <%= link_to (image_tag src="default.jpg"), "/users/#{post.user.id}" %>
        <% end %> 
          
        </div>
        <div class="post-right">
          <div class="post-user-name">
            <%= link_to(post.user.name, "/users/#{post.user.id}") %>
          </div>
          <div class="post-title">
            <%= link_to(post.title.truncate(30), "/posts/#{post.id}") %>
          </div>

          <% if @current_user && Like.find_by(user_id: @current_user.id, post_id: post.id) %>
            <%= link_to("/likes/#{post.id}/destroy", {method: "post"}) do %>
              <span class="fa fa-heart liked-btn"></span>
            <% end %>
          <% else %>
            <%= link_to("/likes/#{post.id}/create", {method: "post"}) do %>
              <span class="fa fa-heart unliked-btn"></span>
            <% end %>
          <% end %>
          <%= @post_like_count[post.id] %> <-------error         
          
        </div>
      </div>
    <% end %>

    <div class="paginate">
      <%= paginate @posts %> <-------error
    </div>

  def index
    @posts = Post.all.order(created_at: :desc).page(params[:page])
    @post_like_count = Like.group(:post_id).count
  end
  
  def show
    @post = Post.find_by(id: params[:id])
    @user = @post.user
    @likes = Like.where(user_id: @user.id)
    @likes_count = Like.where(post_id: @post.id).count
    @comments_count = Comment.where(post_id: @post.id).count
    @comment = Comment.new
    @comments = @post.comments.includes(:user)
    @post_detail = Post.find(params[:id])
    if @current_user.present?
      unless ViewCount.find_by(user_id: @current_user.id, post_id: @post_detail.id)
        @current_user.view_counts.create(post_id: @post_detail.id)
      end
    end
  end
〜省略〜
  def search
    @posts = Post.search(params[:keyword])
    @keyword = params[:keyword]
    render "index"
  end