Breadcrumb breaks when viewing Blogs Entries without query strings

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X EE, Master
• Fix Version/s: 7.0.0 DXP FP22, 7.0.0 DXP SP4, 7.0.X EE, 7.0.4 CE GA5, 7.1.X, Master
• Component/s: Blogs
• Labels:
  • QA-V
  • liferay-digital-enterprise-70-sp4
  • liferay-fixpack-de-22-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/49755

When viewing a Blogs post from a URL without a query string, the "< Blogs" breadcrumb redirector, which normally returns a user to the main section of the blogs app, instead refreshes the page.

Steps to Reproduce:
1. Create a page with a Blogs Portlet
2. Add a blog entry
3. Navigate to the entry
4. Delete the query string from the URL of your current page, and refresh
    --URL should now be something like
    http://localhost:8080/web/guest/TestPage/-/blogs/TestPost
    instead of
    http://localhost:8080/web/guest/TestPage/-/blogs/TestPost?_com_liferay_blogs_web_portlet_BlogsPortlet_redirect=http%3A%2F%2Flocalhost%3A8080%2Fweb%2Fguest%2Flanding-test%3Fp_p_id%3Dcom_lif...

5. Click the Back button inside the Blogs Portlet [< Blogs]

Expected Result:

User navigates back to the main section of the blogs portlet, and is able to see the summaries of other blog posts.

Actual Result:

User remains on current window, and must navigate to a different page to return to the main section of the blog portlet.

 

Reproduced on:

Tomcat 8.0.32 + MySQL 5.7.17. Portal master GIT ID: 2c0fc5642e4693e38375b46fa6d0a3962a515654.