"sql: no rows in result set" on 404 page should be replaced with adequate content.

Objective

I cannot restore my password via WI

When off - full preview on /posts

When on - short preview, like this:

Include links to SVG and jpeg files as well as usage guide

Integrate social stuff from VK & FB.

i.e.:

• allowing one to follow article author on VK
  https://vk.com/dev/Subscribe
  https://developers.facebook.com/docs/plugins/follow-button
• widget for quick subscription, place in sidebar
  https://vk.com/dev/Community
  https://developers.facebook.com/docs/plugins/page-plugin
• Optionally place under disqus
  https://vk.com/dev/Comments
  https://developers.facebook.com/docs/plugins/comments
• one should be able to quickly share the post and we should account that
  https://vk.com/dev/Share
  https://developers.facebook.com/docs/plugins/share-button
• Like button
  https://vk.com/dev/Like
  https://developers.facebook.com/docs/plugins/like-button
• https://vk.com/dev/Recommended showing other articles from our website (based on Like button)

Automatically add disclaimer for posts of our community

Objective

We need to lock post while someone else is editing it to prevent wiping one another's changes.

Implementation detail

• Once user starts editing post, mark it as locked
• Mark post unlocked on saving post or leaving editing page (e.g. with AJAX query)
• Mark post unlocked on timeout
• Send lock-alive AJAX queries from browser updating the lock, while he's still in process of editing to prevent locking on timeout

existing user: http://blog.itkpi.pp.ua/author/webknjaz/ HTTP 500
non-existing user: http://blog.itkpi.pp.ua/author/w/ in body "sql: no rows in result set"

https://developers.facebook.com/docs/instant-articles

https://developers.facebook.com/docs/instant-articles/publishing/setup-rss-feed

What is Instant Article?

1. Make possible specifying multiple authors for the article (possible w/ different roles, TBD).
2. Adjust ACLs/privileges model respectively.
3. Lock post while someone else is editing it to prevent wiping one another's changes. #2