Would be nice to improve the docs, make it clearer, simpler and easy to understand.

First of all, thanks for this great tutorial! I learned a lot following along!

After going through the code several times, I'm wondering why we would need to explicitly encrypt/decrypt field values of our custom EncryptedField type before saving them in the database. Isn't that why we define our custom Ecto Types to begin with, so that we don't need to encrypt/decrypt values manually and expl

Hi,

I have setup a filter as:

number :status, allow_decimal: false, allowed_values: 1..5

if no status is selected in filters, blank value is passed in params. I am filtering the blank values before sending the filter params to Filtrex.parse_params else it responds with an error. This pattern is so common, I was wondering if it would be good idea to include this as an option in t