Tag: computer science

Rubocop - Ruby static code analyzer

4 February 2017
Setting up RuboCop on a Rails project: which of the three shipped configs to start from, and the rules worth disabling.
Preview file using send_file

6 January 2017
Serving access-controlled uploads in Rails with send_file, what :disposition decides, and where CarrierWave's secure-upload setup fits.
db/seeds for carrierwave

4 January 2017
Writing db/seeds for a CarrierWave attachment, for one file and for several, with the sqlite string-column caveat.
N+1 issue

5 December 2016
Why one query for cars and one per car for wheels becomes N+1, and how eager loading collapses it to two.