Ruby 在 Rails 自定义助手输出 HTML 嵌套列表
Ruby on Rails Custom Helper outputting HTML nested list
如标题所示,我正在尝试创建可以执行此操作的助手,但我正在努力。我收到错误或只是像这样的空列表:
我想实现这个:
简单地把这段代码放在视图中有太多的逻辑。结果是一个散列,其中键是网站 ID,值是书签 ID 数组或只是书签 ID。
我的代码:
module WebsitesHelper
def present_search_results(results)
content_tag(:ul, class: "websites-list") do
results.each do |key, value|
website = Website.find(key)
concat(content_tag(:li, website.url, class: "website-#{key}") do
bookmarks = website.bookmarks.select do |b|
if value.is_a?(Array)
value.include?(b.id)
else
value = b.id
end
end
content_tag(:ul, nil, id: "website-#{key}") do
bookmarks.each do |b|
content_tag(:li, b.title)
end
end
end)
end
end
end
end
如果您想坚持使用助手,那么这样的事情可能会有所帮助:
def present_search_results(results)
content_tag(:ul, class: "websites-list") do
results.map do |website_id, bookmarks|
bookmarks = [bookmarks] unless bookmarks.is_a?(Array)
content_tag(:li, class: "website-#{website_id}") do
website = Website.find(website_id)
concat(website.url)
concat(
content_tag(:ul, class: "bookmarks-list") do
bookmarks.map do |bookmark_id|
bookmark = Bookmark.find(bookmark_id)
content_tag(:li, bookmark.title)
end.reduce(:+)
end
)
end
end.reduce(:+)
end
end
但是,在我看来,该代码不容易阅读,因此您可以改用普通的 html
,如下所示:
def present_search_results(results)
list = "<ul class='websites-list'>"
results.each do |(website_id, bookmarks)|
bookmarks = [bookmarks] unless bookmarks.is_a?(Array)
website = Website.find(website_id)
list += "<li class='website-#{website_id}'>#{website}"
list += "<ul class='bookmarks-list'>"
bookmarks.each do |bookmark_id|
bookmark = Bookmark.find(bookmark_id)
list += "<li>#{bookmark.title}</li>"
end
list += "</ul></li>"
end
list += "</ul>"
list.html_safe
end
我更喜欢这个,因为它更容易阅读。但是两者都输出了你想要的列表。
如标题所示,我正在尝试创建可以执行此操作的助手,但我正在努力。我收到错误或只是像这样的空列表:
我想实现这个:
我的代码:
module WebsitesHelper
def present_search_results(results)
content_tag(:ul, class: "websites-list") do
results.each do |key, value|
website = Website.find(key)
concat(content_tag(:li, website.url, class: "website-#{key}") do
bookmarks = website.bookmarks.select do |b|
if value.is_a?(Array)
value.include?(b.id)
else
value = b.id
end
end
content_tag(:ul, nil, id: "website-#{key}") do
bookmarks.each do |b|
content_tag(:li, b.title)
end
end
end)
end
end
end
end
如果您想坚持使用助手,那么这样的事情可能会有所帮助:
def present_search_results(results)
content_tag(:ul, class: "websites-list") do
results.map do |website_id, bookmarks|
bookmarks = [bookmarks] unless bookmarks.is_a?(Array)
content_tag(:li, class: "website-#{website_id}") do
website = Website.find(website_id)
concat(website.url)
concat(
content_tag(:ul, class: "bookmarks-list") do
bookmarks.map do |bookmark_id|
bookmark = Bookmark.find(bookmark_id)
content_tag(:li, bookmark.title)
end.reduce(:+)
end
)
end
end.reduce(:+)
end
end
但是,在我看来,该代码不容易阅读,因此您可以改用普通的 html
,如下所示:
def present_search_results(results)
list = "<ul class='websites-list'>"
results.each do |(website_id, bookmarks)|
bookmarks = [bookmarks] unless bookmarks.is_a?(Array)
website = Website.find(website_id)
list += "<li class='website-#{website_id}'>#{website}"
list += "<ul class='bookmarks-list'>"
bookmarks.each do |bookmark_id|
bookmark = Bookmark.find(bookmark_id)
list += "<li>#{bookmark.title}</li>"
end
list += "</ul></li>"
end
list += "</ul>"
list.html_safe
end
我更喜欢这个,因为它更容易阅读。但是两者都输出了你想要的列表。