ruby 升级到 Capybara 2.0 后如何单击项目列表中的第一个链接？
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How to click first link in list of items after upgrading to Capybara 2.0?
提问by tomekfranek
How to click first link in that case:
在这种情况下如何单击第一个链接：
<div class="item">
<a href="/agree/">Agree</a>
</div>
<div class="item">
<a href="/agree/">Agree</a>
</div>
within ".item" do
first(:link, "Agree").click
end
and I get this error:
我收到这个错误：
Capybara::Ambiguous:
Ambiguous match, found 2 elements matching css ".item"
And without the withinI get this error:
没有within我得到这个错误：
Failure/Error: first(:link, "Agree").click
NoMethodError:
undefined method `click' for nil:NilClass
回答by Andrei Botalov
You can just use:
你可以只使用：
first('.item').click_link('Agree')
or
或者
first('.item > a').click
(if your default selector is :css)
（如果您的默认选择器是 :css）
Code in your question doesn't work as:
您问题中的代码不起作用：
within ".item" do
first(:link, "Agree").click
end
is equivalent to:
相当于：
find('.item').first(:link, "Agree").click
Capybara finds several .item's so it raises an exception. I consider this behavior of Capybara 2 very good.
Capybara 找到了几个.item's 所以它引发了一个异常。我认为 Capybara 2 的这种行为非常好。
回答by adamdboudreau
Try the following:
请尝试以下操作：
within ".item" do
click_link("Agree", :match => :first)
end
Sources:
资料来源：
回答by Elle Mundy
This phrasing also works:
这句话也适用：
within first(".item") do
click_link "Agree"
end
回答by DGM
Xpath can address the element. I'm not very good with it yet, but something like //div[@class='active'][1]/a
Xpath 可以寻址元素。我还不是很擅长，但类似//div[@class='active'][1]/a
That may or may not work, but the point is that xpath can address an array of matches and pull out a particular one. You should be able to match with this.
这可能有效，也可能无效，但关键是 xpath 可以寻址一组匹配项并提取特定的匹配项。你应该能够匹配这个。
A working example example from one of my projects:
我的一个项目中的一个工作示例：
within page.find("div.panel", text: /Proposals/) do
within page.find('tr', text: /Foo/) do
page.should have_xpath('td[3]', text: @today)
end
end
回答by nroose
Since first() doesn't always wait, perhaps this is useful:
由于 first() 并不总是等待，也许这很有用：
expect(page).to have_css("selector")
first("selector").click
回答by Salomanuel
most of those solutions will not use Capybara's brilliant waiting features
大多数这些解决方案不会使用 Capybara 出色的等待功能
better do as this link suggests:
https://thoughtbot.com/blog/write-reliable-asynchronous-integration-tests-with-capybara#find-the-first-matching-element
最好按照这个链接的建议去做：https:
//thoughtbot.com/blog/write-reliable-asynchronous-integration-tests-with-capybara#find-the-first-matching-element
Bad:
坏的：
first(".active").click
If there isn't an .active element on the page yet, first will return nil and the click will fail.
first(".active").click
如果页面上还没有 .active 元素， first 将返回 nil 并且点击将失败。
Good:
好的：
If you want to make sure there's exactly onefind(".active").click
如果你想确保只有一个find(".active").click
If you just want the first elementfind(".active", match: :first).click
Capybara will wait for the element to appear before trying to click.
如果您只想要第一个元素，find(".active", match: :first).click
Capybara 将在尝试单击之前等待该元素出现。
Note that match: :firstis more brittle, because it will silently click on a different element if you introduce new elements which match.
请注意，match: :first它更脆弱，因为如果您引入匹配的新元素，它会默默地点击不同的元素。
回答by IT Vlogs
Simple you can use:
简单你可以使用：
$('.item').find('a').first().click();
