Streamline Usage with parse_params! and parse!

[rcdilorenzo]

If an error happens with either of these calls, they will indicate in the Filtrex struct that the filter is empty:

%Filtrex{empty: true}

When this value is piped into Filtrex.query/2, it will by default not narrow the query but could be configurable to always return an empty set of values:

# default behavior:
Filters.query(YourApp.YourModel, %Filtrex{empty: true})
# => does not narrow query

# optional behavior
Filters.query(YourApp.YourModel, %Filtrex{empty: true}, allow_empty: false)
# => returns query that never matches (e.g. true == false or something similar)

[smpallen99]

Looks great. I like default to not narrow the query.

BTW, I tested the following..

import Ecto.Query

Product |> where(false) |> Repo.all
# []