Ruby on rails Rails 6 ActionText获取第一个图像

我有一个后模型：

类Post 我认为get first image~get first active storage blob属于内容类型为image的帖子

irb(main):017:0> Post.last.content
  Post Load (22.6ms)  SELECT `posts`.* FROM `posts` ORDER BY `posts`.`id` DESC LIMIT 1
  ActionText::RichText Load (3.2ms)  SELECT `action_text_rich_texts`.* FROM `action_text_rich_texts` WHERE `action_text_rich_texts`.`record_id` = 12 AND `action_text_rich_texts`.`record_type` = 'Post' AND `action_text_rich_texts`.`name` = 'content' LIMIT 1
Traceback (most recent call last):
        1: from (irb):17
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 4.0ms | Allocations: 54)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.6ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.8ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.3ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/content/_layout.html.erb (Duration: 445.6ms | Allocations: 54464)
NoMethodError (undefined method `first' for #<ActionText::RichText:0x00007fb0a9e33620>)
irb(main):018:0> Post.last.content.body
  Post Load (1.6ms)  SELECT `posts`.* FROM `posts` ORDER BY `posts`.`id` DESC LIMIT 1
  ActionText::RichText Load (3.4ms)  SELECT `action_text_rich_texts`.* FROM `action_text_rich_texts` WHERE `action_text_rich_texts`.`record_id` = 12 AND `action_text_rich_texts`.`record_type` = 'Post' AND `action_text_rich_texts`.`name` = 'content' LIMIT 1
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 54)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.3ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.2ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.7ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/attachables/_remote_image.html.erb (Duration: 0.1ms | Allocations: 52)
  Rendered /Users/stronglong/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/actiontext-6.0.0.rc2/app/views/action_text/content/_layout.html.erb (Duration: 115.7ms | Allocations: 53442)
=> #<ActionText::Content "<div class=\"trix-conte...">

参考：我看到这个描述，你可以调用content.to_plain_text获取文本和内容。embeds获取所有附件播放关联以获取第一个图像，因为它可以嵌入其他内容

ActionText模型提供了关联嵌入，因此您可以使用方便的方法image调用find

---

感谢罗兰的回答，它应该被接受

要避免N+1查询，请使用\u rich\u text\u[ATTRIBUTE]\u和\u嵌入进行添加。

“我的模型”中的内容位于“文本”属性中

posts\u controller.rb

@post = Post.with_rich_text_text_and_embeds.find(params[:id])

show.html.erb

<% if !post.text.embeds.empty? %>
    <%= image_tag post.text.embeds.find{|embeds| embeds.image?}.variant(resize_to_limit: [200, 200]) %>
<% end %>

---

将非常感谢任何更有效的解决方案。

如果有人知道我们如何通过一些连接实现更高效的查询，我将非常感谢这样的回答。

<% if !post.text.embeds.empty? %>
    <%= image_tag post.text.embeds.find{|embeds| embeds.image?}.variant(resize_to_limit: [200, 200]) %>
<% end %>