I am getting this error:

PG::UndefinedColumn: ERROR: column "created_at" does not exist

Yet your event's table schema description states that column

"events" Table Schema:
id
name (String)
created_at (DateTime)
description (String)

You have a point there yourself!

Same here.

Thanks :)

Quite challenging. Good Kata!

I've just starting to work on solving this. Wouldn't it be better for the group bys to have the keys as the group rather than another array element.

i.e.

{ 
   "teacher": [], 
   "politician": [], 
   ..... 
}

instead of

[ 
  [ 
    "teacher", 
    [] 
  ], 
  [ 
    "politician", 
    [] 
  ], 
  ..... 
]

I knew there was a way to find the closest word from my algorithms class. Just had to find it!

I learned something new! Sweet! Thanks for this challenge!

A little challenging for me. Thank you!