如何将 to_sentence 添加到 :collection

发布于 2024-12-07 01:40:12 字数 611 浏览 0 评论 0原文

我有以下代码可以生成最高级列表：

<%= render :partial => 'superlative', :collection => @profile.superlatives %>

上面引用的 :partial 代码如下：

<li class="superlative"><span title="<%= superlative.name %>">
  <%= superlative.body %>
</span></li>

如何将 to_sentence 添加到 @profile.superlatives 集合？我尝试过：

<%= render :partial => 'superlative', :collection => @profile.superlatives.to_sentence %>

但是这样做会使@profile.superlatives从视图中消失。

我查看了文档但找不到答案。

原文

I have the following code that generates a list of superlatives:

<%= render :partial => 'superlative', :collection => @profile.superlatives %>

The :partial code referenced above is as follows:

<li class="superlative"><span title="<%= superlative.name %>">
  <%= superlative.body %>
</span></li>

How can I add to_sentence to the @profile.superlatives collection? I tried:

<%= render :partial => 'superlative', :collection => @profile.superlatives.to_sentence %>

Doing so however makes the @profile.superlatives disappear from the view.

I looked at the docs but couldn't find an answer.

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囍笑 2024-12-14 01:40:12

哦哦，现在我明白了。抱歉造成混乱。这就是我会做的：

在你的控制器中：

@superlative_bodies = @profile.superlatives.map &:body
# Equivalent to: @superlative_bodies = @profile.superlatives.map {|sup| sup.body }

在你的视图中：

= @superlative_bodies.to_sentence

有些人会在视图中完成这一切，这取决于你：

= @profile.superlatives.map(&:body).to_sentence

解释一下， .map 是一个超级有用的 Ruby 方法它接受一个数组或其他 Enumerable 和一个块，并返回一个新数组，其中每个元素都是应用该块后原始数组中的相应元素。例如：（

[ 'foo', 'bar', 'baz' ].map {|word| word.upcase } # => [ 'FOO', 'BAR', 'BAZ' ]
# or
[ 'foo', 'bar', 'baz' ].map &:upcase              # => [ 'FOO', 'BAR', 'BAZ' ]

当您只想在每个元素上调用相同的单个方法时，后者只是前者的缩短版本。）

Ohhh, now I understand. Sorry for the confusion. Here's what I would do:

In your controller:

@superlative_bodies = @profile.superlatives.map &:body
# Equivalent to: @superlative_bodies = @profile.superlatives.map {|sup| sup.body }

In your view:

= @superlative_bodies.to_sentence

Some people would do this all in the view instead, which is up to you:

= @profile.superlatives.map(&:body).to_sentence

To explain, .map is a super-useful Ruby method that takes an array or other Enumerable and a block and returns a new array where each element is the corresponding element from the original array after the block has been applied to it. For example:

[ 'foo', 'bar', 'baz' ].map {|word| word.upcase } # => [ 'FOO', 'BAR', 'BAZ' ]
# or
[ 'foo', 'bar', 'baz' ].map &:upcase              # => [ 'FOO', 'BAR', 'BAZ' ]

(The latter is just a shortened version of the former for when you only want to call the same single method on every element.)

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溺渁∝ 2024-12-14 01:40:12

也许是这样的？

module ProfilesHelper
  # ...
  def superlatives_items (profile)
    @@acb ||= ActionController::Base.new # required to access render_to_string
    profile.superlatives.collect |superlative|
      acb.render_to_string :partial => 'path/to/partial/superlative',
                           :layout => false,
                           :locals => { :superlative => superlative }
    end
  end
  # ...
end

# In view:

# <%= raw(superlatives_items(@profile).to_sentence) %>

Something like this, perhaps?

module ProfilesHelper
  # ...
  def superlatives_items (profile)
    @@acb ||= ActionController::Base.new # required to access render_to_string
    profile.superlatives.collect |superlative|
      acb.render_to_string :partial => 'path/to/partial/superlative',
                           :layout => false,
                           :locals => { :superlative => superlative }
    end
  end
  # ...
end

# In view:

# <%= raw(superlatives_items(@profile).to_sentence) %>

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