我在rails 6中对HTML可排序更新进行更新时遇到问题。我通过网页拖放了一些图片组合,效果很好,但是当我想用更新的位置更新网页时,我得到了 NoMethodError(未定义) nil:NilClass的方法“ each”):
我将此脚本用于HTML Sortable
portfolio_controller:
class PortfoliosController < ApplicationController
before_action :set_portfolio_item, only: [:edit, :show,:update, :destroy]
layout "portfolio"
access all: [:show, :index, :angular], user: {except: [:destroy, :new, :create, :update, :edit]}, site_admin: :all
def index
@portfolio_items = Portfolio.by_position
end
def sort
params[:order].each do |key, value|
Portfolio.find(value[:id]).update(position: value[:position])
end
head :ok
end
def angular
@angular_portfolio_items = Portfolio.angular
end
def new
@portfolio_item = Portfolio.new
3.times { @portfolio_item.technologies.build }
end
def create
@portfolio_item = Portfolio.new(portfolio_params)
respond_to do |format|
if @portfolio_item.save
format.html { redirect_to portfolios_path, notice: 'Your Portfolio item is now live.' }
else
format.html { render :new }
end
end
end
def edit
end
def update
respond_to do |format|
if @portfolio_item.update(portfolio_params)
format.html { redirect_to portfolios_path, notice: 'The Record successfully updated.' }
else
format.html { render :edit }
end
end
end
def show
end
def destroy
#Destroy/delete the record
@portfolio_item.destroy
#Redirect
respond_to do |format|
format.html { redirect_to portfolios_url, notice: 'Record was removed' }
end
end
private
def set_portfolio_item
@portfolio_item = Portfolio.find(params[:id])
end
def portfolio_params
params.require(:portfolio).permit(:title,
:subtitle,
:body,
technologies_attributes: [:name]
)
end
end
routes.rb:
Rails.application.routes.draw do
devise_for :users, path: '', path_names: { sign_in: 'login', sign_out: 'logout', sign_up: 'register'}
resources :portfolios, except: [:show] do
put :sort, on: :collection
end
get 'angular-items', to: 'portfolios#angular'
get 'portfolio/:id', to: 'portfolios#show', as: 'portfolio_show'
get 'about-me', to: 'pages#about'
get 'contact', to: 'pages#contact'
resources :blogs do
member do
get :toggle_status
end
end
root to: 'pages#home'
end
这是我的Portfolio.js:
var ready, set_position;
ready = void 0;
set_position = void 0;
set_position = function() {
$(".card").each(function(i) {
$(this).attr('data-pos', i + 1);
});
};
ready = function() {
set_position();
$('#sortable').sortable();
$('#sortable').sortable().bind('sortupdate', function(e, ui) {
var updated_order;
updated_order = [];
set_position();
$(".card").each(function(i) {
updated_order.push;
({
id: $(this).data('id'),
position: i + 1
});
});
$.ajax({
type: 'PUT',
url: '/portfolios/sort',
data: {
order: updated_order
}
});
});
};
$(document).ready(ready);
_portfolio_item.html.erb:
<div class="card" data-id="<%= portfolio_item.id %>">
<%= image_tag portfolio_item.thumb_image unless portfolio_item.thumb_image.nil? %>
<p class="card-text">
<span>
<%= link_to portfolio_item.title, portfolio_show_path(portfolio_item) %>
</span>
<%= portfolio_item.subtitle %>
</p>
</div>
感谢您的帮助!
答案 0 :(得分:0)
我看到的每个语句的唯一位置是PortfoliosController的sort方法。
params[:order].each
您需要设置params [:order]或通过检查是否已设置来防止发生此错误。您可以使用保存导航运算符:
params[:order]&.each
还是可以检查order参数是否设置为现在?方法。
if params[:order].present?
params[:order]&.each