主机链接丢失！请提供：host参数，设置default_url_options [：host]，或将：only_path设置为true [英] Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true

问题描述

我正在阅读Rails 4 in Action。在使用Rspec和Capybara进行测试时，出现上述错误。我的viewing_projects_spec.rb如下所示：

I'm reading through Rails 4 in Action. I'm getting the aforementioned error while testing with Rspec and Capybara. My viewing_projects_spec.rb looks like this:

require 'spec_helper'

feature "Viewing projects" do
  scenario "Listing all projectcs" do
    project = FactoryGirl.create(:project, name: "TextMate 2")
    visit '/'
    click_link 'TextMate 2'
    expect(page.current_url).to eql(project_url(project))
  end
end

其余错误表示失败/错误：Expect（page.current_url）.to eql（project_url（project））。

我做了一些谷歌搜索，有人说要在config / environments / development.rb中放置以下内容：

I did some googling and people say to place the following inside config/environments/development.rb:

Rails.application.routes.default_url_options[:host] = 'localhost:3000'

不幸的是，这没有任何作用。

Unfortunately this doesn't do anything.

推荐答案

host语句应放在config / environments / test.rb中，而不是开发中.rb，因为您正在运行测试。

The host statement should be put into config/environments/test.rb instead of development.rb, because you are running tests.

看到 example.com的原因是Capybara将其设置为默认主机。要更改此设置，只需在需要'capybara'

The reason you see 'example.com' is Capybara set this as default host. To change that, just add the following line in spec_help after require 'capybara'

Capybara.default_host = 'localhost:3000'

参考： https://rspec.lighthouseapp.com/projects/16211-cucumber/tickets/206

然后，您的网址应该与您在test.rb中设置的内容匹配。

Then you urls should match what you've set in test.rb.

无论如何，我希望不会遇到麻烦直接使用 current_path 。

Anyway, I would prefer not to have that trouble to use current_path directly.

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