Html 如何使用 check_box_tag 在 Haml 中选中复选框
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/12957348/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to check a check box in Haml using check_box_tag
提问by user1756646
Can someone tell me how to set these check boxes to checked? I'm sure it's simple, but after an hour of trying i think I need to ask! Thanks!
有人可以告诉我如何将这些复选框设置为选中状态吗？我确定这很简单，但经过一个小时的尝试，我想我需要问一下！谢谢！
= form_tag movies_path, :id => 'ratings_form', :method => :get do
Include:
- @all_ratings.each do |rating|
= rating
= check_box_tag "ratings[#{rating}]",
= submit_tag 'Refresh', :id => 'ratings_submit'
回答by Salil
Ref check_box_tag
check_box_tag "ratings[#{rating}]", 1, !!(rating.rating)
Your 2nd parametermust be valueof checkbox
你2nd parameter必须是value复选框
Your 3rd parametermust be a boolean conditionwhich return true/falseand depends on it checkbox is checked/unchecked
你3rd parameter必须是一个boolean condition返回true/false并取决于它复选框是checked/unchecked
回答by Matias Yaryura
check_box_tag "ratings[#{rating}]", 1, @selected.include?("#{rating}")
where @selectedis an array with the element selected.
其中@selected是选择元素的数组。
回答by rghjfjh
Use true for Checked or false for Unchecked at the end of the line
在行尾对 Checked 使用 true 或对 Unchecked 使用 false
check_box_tag "ratings[#{rating}]", true #checked
or
或者
check_box_tag "ratings[#{rating}]", false #unchecked
回答by FletchRichman
According to the api dock, check box tag takes the following options:
根据api Dock，复选框标签采用以下选项：
check_box_tag(name, value = "1", checked = false, options = {})
check_box_tag(name, value = "1", checked = false, options = {})
This means the first value is the name, the second value is a 'value' and the third value is whether the box is checked, which is default to false. So, in order to check or uncheck the box you can do the following:
这意味着第一个值是名称，第二个值是“值”，第三个值是是否选中该框，默认为 false。因此，为了选中或取消选中该框，您可以执行以下操作：
- if (some condition)
= check_box_tag "ratings[#{rating}]", "anystring", true
- else
= check_box_tag "ratings[#{rating}]"
The second line just puts a random string into the value field because in this case it does not matter.
第二行只是将一个随机字符串放入 value 字段，因为在这种情况下它无关紧要。
回答by Ryan Snodgrass
Building on the answer by Sali. Strangely, the check_box_tagreturns a checkbox with no label text. Here's how you can display text if you're iterating over an array.
基于 Sali 的回答。奇怪的是，check_box_tag返回一个没有标签文本的复选框。如果您在数组上进行迭代，您可以通过以下方式显示文本。
- Puppies.each do |puppy|
= check_box_tag(puppy.name, puppy.name, puppy.goodboy?)
= puppy.name
回答by Sunny Sharma
= check_box_tag "ratings[#{rating}]",{},{:checked => ""}
