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How to do a image link with a post method in Ruby on Rails

I have the following code:

<a <%= link_to "Basket", product_items_path(product_id: product), :method => :post %><%= image_tag"/assets/addToBasket.png" %></a>

This displays the link that will add the item to the basket, along with the image below. How would I turn the image into a clickable link that will use a link and the post method?

link_to can take a block like this.

<%= link_to product_items_path(product_id: product), method: :post do %>
  <%= image_tag "addToBasket.png" %>
<% end %>

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