How to best move fb-comments from http to https

Question

We are in the process of moving a Ruby On Rails website from HTTP to HTTPS. Our sites uses the fb-comments plugin to capture user comments on various pages. During our testing we found when we switch a page from HTTP to HTTPS Facebook seems to see this as a new page and no longer loads any of the previous comments for the page.

In other words, http://my.domain.com/page1 and https://my.domain.com/page1 are treated as separate pages with different sets of comments by fb-comments.

Here's a snippet of our HTML that includes the current call to fb-comments:

<div class="fb-comments"
     data-href="<%=url_for(:only_path=>false)%>"
     data-num-posts="<%=number_of_posts%>"
     data-width="<%=width%>">
</div>

Does any know the correct way to get Facebook to return the comments for the page regardless of the protocol (HTTP vs. HTTPS)?

Answer 1

According to my testing you need to remove 'http://' and 'https://' from fb-comments, so I use this block:

<div class="fb-comments" data-href="www.mydomain.com/page1.html"></div>

Answer 2

The only way to keep the comments afaik is to use the http URL in the data-href parameter. I don´t think there are any downsides to this.