# Weird Rails partials bug with View Components

Yesterday, during my regular  [Avo](https://avohq.io)  coding sessions I ran into a strange-looking bug.

### Context

I created a  [View Component](https://viewcomponent.org/) names `ResourceShow` inside which I used a helper `a_link` that renders a button-looking link using a helper and a regular Rails partial.
The code looks like this:

``` ruby
# application_helper.rb
module ApplicationHelper
  def a_link(label, url = nil, **args, &block)
    args[:style] = 'border: 1px solid red;'

    if block_given?
      url = label
    end

    locals = {
      label: label,
      url: url,
      args: args,
    }

    if block_given?
      render layout: 'layouts/a_link', locals: locals do
        capture(&block)
      end
    else
      render partial: 'layouts/a_link', locals: locals
    end
  end
end
```
```ruby
# application_helper.rb
<% if (block = yield).empty? %>
  <%= link_to label, url, **args %>
<% else %>
  <%= link_to url, **args do %>
    <%= yield %>
  <% end %>
<% end %>
```

So running this `<%= a_link '/' do %>Content inside the button<% end %>` should render a basic button. 
Because we'll be using this helper inside a view component, by checking their [docs on helpers](https://viewcomponent.org/#using-helpers) we need to prepend the `helpers.` function, so we'll do `<%= helpers.a_link '/' do %>Content inside the button<% end %>`.

But instead of our plain button, we'll get this weird bug.

![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1613463088381/vg-GdAIFz.png)

The content inside the block will get duplicated and prepended outside the whole button 🤯

### The fix

You just need to stop using the `helpers` prepend method in the template and include the helper module in the view component 🔥.

```ruby
# app/components/hello_component.rb
class HelloComponent < ViewComponent::Base
  include ApplicationHelper
end
```
```ruby
# app/components/hello_component.html.erb
<%= a_link '/' do %>
  Content inside the button
<% end %>
```

![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1613463468535/oI9ON8aJG.png)

I'm writing this hoping that this will help someone in the future not lose their minds with this weird partials bug.

Stay sane, stay positive ✌️

> Photo by  [Greta Pichetti](https://unsplash.com/@gretapichi) 

> Source code on [GitHub](https://github.com/adrianthedev/rails_partials_view_components_bug)