# Paramus
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Parameter validation for [Phoenix](https://github.com/phoenixframework/phoenix).
### Example
```elixir
defmodule Example.Routes.Fruit do
use Phoenix.Controller
use Paramus
@required [
name: :string,
quantity: :integer
]
@optional [
cut?: {:boolean, false}
]
def consume(conn, %{name: name, quantity: quantity, cut?: cut?}) do
# ···
end
def validate(changeset, :consume) do
changeset
|> validate_length(:name, min: 3)
|> validate_number(:quantity, less_than: 5)
end
end
```