Today I Learned

git log --pretty=oneline gives you the one-line per a commit output.

git log --pretty=format:"%an" gives you formatting on commits. All the interpolations available are listed in the man git-log under “PRETTY FORMATS”.

attr_readonly exists in Rails for making fields immutable. But we’re in Rails, so we don’t use big words like immutable, we use readonly. Caveat: you can still change the values in memory, which has other consequences around validations and any derived values.