Rails：在父模型的视图中创建 has_one 模型？

发布于 2024-12-03 06:52:35 字数 1299 浏览 1 评论 0原文

我有两个模型，角色和背景。角色有一个背景，并且背景属于角色。我设置了一个 _menu 部分来显示在我的角色视图中，以允许用户查看与角色相关的其他模型，例如物品和法术。

但是，Character 与这些其他模型具有 has_many 关系，并且我无法弄清楚如何正确链接到具有 has_one 关系的模型。

这是从我的角色视图页面添加新页面的方法，适用于 has_many 模型：

<%= link_to 'Items Page', character_items_path(@character) unless @character.items.exists? %>

这是菜单部分中的代码，一旦创建页面，它将链接到页面：

<%= link_to 'Items', character_items_path(@character) if @character.items.exists? %>

以及来自我的背景控制器的代码：

def new
  @character = Character.find(params[:character_id])
  @background = @character.build_background(params[:background])
end

def create
  @character = Character.find(params[:character_id])
  @background = @character.create_background(params[:background])
   if @background.save
 redirect_to character_path(@character), :notice => "Background information successfully created!"
   else
 render :action => "new"
 end
end

Any建议？基本上，我希望有一个链接在角色显示页面中创建一个新的背景页面，然后在创建背景后将其显示在菜单部分中，并且当用户单击链接时可以查看和编辑该背景。

我确实尝试像这样编写代码：

<%= link_to 'Background', character_background_path(@character) if @character.background.exists? %>

但是Rails 抱怨.exists？是一个未定义的方法。我猜 .exists 不适用于 has_one 关系，否则我一开始就错误地使用了它。感谢您的任何意见！

原文

I have two models, Character and Background. Character has_one Background, and Background belongs_to Character. I have a _menu partial set up to display in my Character view, to allow users to view other models related to Character, such as Items and Spells.

However, Character has a has_many relationship with these other models and I'm having trouble figuring out how to link correctly to a model with a has_one relationship.

Here's the method for adding a new page from my Character view page, for a has_many model:

<%= link_to 'Items Page', character_items_path(@character) unless @character.items.exists? %>

And here's the code from the menu partial, that will link to a page once a page has been created:

<%= link_to 'Items', character_items_path(@character) if @character.items.exists? %>

And the code from my Backgrounds controller:

def new
  @character = Character.find(params[:character_id])
  @background = @character.build_background(params[:background])
end

def create
  @character = Character.find(params[:character_id])
  @background = @character.create_background(params[:background])
   if @background.save
 redirect_to character_path(@character), :notice => "Background information successfully created!"
   else
 render :action => "new"
 end
end

Any advice? Basically, I want to have a link_to create a new Background page in the Character show page, then have that Background show up in the Menu partial once it's created and able to be viewed and edited when a user clicks on the link.

I did try writing the code like so:

<%= link_to 'Background', character_background_path(@character) if @character.background.exists? %>

But then Rails complains that .exists? is an undefined method. I'm guessing .exists doesn't work for a has_one relationship, or else I'm using it incorrectly in the first place. Thanks for any input!

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