Users can create pitches for journalists

Trello: https://trello.com/c/0oul2GrI/44-users-create-pitches

In this feature, users can create write one pitch, assign multiple journalists and have an individual pitch created for each journalist.

I suspect the batch_pitch_params part of the batch_pitch controller can be refactored.

Includes addition of pry & better_errors gems
Not sure I understand why you extracted this from the BatchPitches controller? Why not just make it a private method in the controller since it is only used there. Also, you are really on implicit presence of instance variables which is another indicator that this probably didn't want to be extracted. See above for suggestion.