我正在尝试在我的Rails应用中创建漂亮的网址。我无法理解模型中#slug_candidates
方法内发生的事情。
class News < ApplicationRecord
friendly_id :slug_candidates, use: [:slugged, :finders, :history]
def slug_candidates
[:title,
[:title, :id]
]
end
end
在answer中也找到了类似的方法:
def slug_candidates
[
:name,
[:name, 2],
[:name, 3],
[:name, 4],
[:name, 5],
[:name, 6],
[:name, 7]
]
end
有人可以提供该方法的简要说明吗?
答案 0 :(得分:3)
如果我们有2个news
具有相同的标题,slugs
将是相同的。所以我们无法识别它们。例如:
New.all
# => [#<New id: 1, tile: "Title">, #<New id: 2, tile: "Title">]
# Without `slug_candidates`
New.first # => URL: "news/title"
New.second # => URL: "news/title"
# => We cannot find the second one.
现在slug_candidates
提供了一个变种列表,而FriendlyId将遍历该列表,直到找到尚未采取的slug为止。
# With `slug_candidates`
def slug_candidates
[:title, [:title, :id]]
end
New.first # => URL: "news/title"
New.second # => URL: "news/title-2"