我需要连接到服务器，我知道该服务器将在端口上侦听。尽管可能需要一些时间才能投入运营。是否可以让 ClientBootstrap 尝试连接给定的尝试次数或直到达到超时？
目前，如果连接被拒绝，我会收到异常，但它应该尝试在后台连接，例如通过尊重“connectTimeoutMillis”引导选项。
我正在尝试使用Croppie Library将图像裁剪为cicle
我试图使用他们的函数返回base64编码的图像.它返回一个base64代码,但没有图像:这是我的代码:
<div id="vanilla-demo"></div>
</div>
<img id="myImage" src="">
<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
<script src="croppie.js"></script>
<script type="text/javascript">
var vanilla = new Croppie(document.getElementById('vanilla-demo'), {
viewport: { width: 200, height: 200 , type:'circle'},
boundary: { width: 400, height: 400 },
showZoom: false
});
vanilla.bind('dac.jpg');
vanilla.result('canvas','original').then(function (src) {
console.log(src);
$('#myImage').attr('src', src);
});
</script>
我和Michael Hartl的教程一起工作.目前我在第10章.在第10.28部分,当我尝试运行测试时:
bundle exec rspec spec/requests/authentication_pages_spec.rb
我收到此错误:
Failures:
2) Authentication authorization for non-signed-in users in the Microposts
controller submitting to the destroy action Failure/Error: before { delete
microposts_path (FactoryGirl.create(:micropost)) } ActionController::RoutingError:
No route matches [DELETE] "/microposts.1"
# ./spec/requests/authentication_pages_spec.rb:115:in`block(6 levels) in
<top required)>'
这是我的authentication_pages_spec.rb:
require 'spec_helper'
describe "Authentication" do
let(:user) { FactoryGirl.create(:user) }
subject { page }
describe "signin page" do
before { visit signin_path }
it { should have_selector('h1', text: 'Sign in') }
it { should have_selector('title', text: …我正在研究Hartl教程的第11章,试图non-logged-in users in the Users controller visiting the followers and following page通过.我遇到了一个错误,Rails会抱怨一个未定义的admin?方法,尽管它仅用于User部分方法.
Rails本地服务器
Rendered users/_user.html.erb (9.4ms)
Rendered users/show_follow.html.erb within layouts/application (33.0ms)
Completed 500 Internal Server Error in 43ms
ActionView::Template::Error (undefined method `admin?' for nil:NilClass):
1: <li>
2: <%= gravatar_for user, size: 52 %>
3: <%= link_to user.name, user %>
4: <% if current_user.admin? && !current_user?(user) %>
5: | <%= link_to 'delete', user, method: :delete,
6: data: { confirm: 'Are you sure?' } …让我说我有这个string ="C:/EFI/Ulta/Filename.rb",我试图只从它分裂"文件名".
我尝试了string.split.last并返回"Filename.rb",我尝试删除".rb",但drop方法对我不起作用.我还可以使用其他方法吗？
我正在使用dry-type和dry-struct，我想进行条件验证。
上课：
class Tax < Dry::Struct
attribute :tax_type, Types::String.constrained(min_size: 2, max_size: 3, included_in: %w[IVA IS NS])
attribute :tax_country_region, Types::String.constrained(max_size: 5)
attribute :tax_code, Types::String.constrained(max_size: 10)
attribute :description, Types::String.constrained(max_size: 255)
attribute :tax_percentage, Types::Integer
attribute :tax_ammount, Types::Integer.optional
end
如果 `tax_type =='IS'，我想验证tax_ammount为整数和强制性。