[Rails] Get the path name of the URL before the transition and change the link destination

environment

rails 6.0.3

Explanation

How to branch the link destination to be displayed on the page according to the ** path name ** in ʻURL` of the page before the transition.

Supplement

What is a path name? * https:///www.example.com/user If so, the pathname is / user

`Applicable view file`


<% if URI(request.referer.to_s).path == 'Path name' %>
  #Link destination when the previous page is the specified path
<% else %>
  #Other links
<% end %>

request.referer returns a string.

It is necessary to convert to a character string with to_s so that an error does not occur when a request is made with a numerical value (ʻinteger) in ʻURL.

You can only request the path by wrapping request.referer using Ruby's ʻURI module``.

Reference article

How to get all URLs and branch the link to be displayed on the page https://qiita.com/taka_571/items/9b1c82d8fcc602df8a1a

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