feat: improve documentation on concatenation of different field types, …

…closes #60

CHANGELOG.md

@@ -8,6 +8,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 -->
 
+## [Unreleased]
+
+### Changed
+- Improved documentation on concatenation of different field types.
+
 ## [3.0.0] - 2024-09-10
 ### Breaking
 - Removed `SCRUBBER_VALIDATION_WHITELIST` in favour of `SCRUBBER_REQUIRED_FIELD_MODEL_WHITELIST` - Thanks @GitRon

README.md

@@ -144,11 +144,13 @@ class Scrubbers:
 Wrapper around `django.db.functions.Concat` to enable simple concatenation of scrubbers. This is useful if you want to
 ensure a fields uniqueness through composition of, for instance, the `Hash` and `Faker` (see below) scrubbers.
 
+When using different input field types, make sure to explicitly state an `output_field` type.
+
 The following will generate random email addresses by hashing the user-part and using `faker` for the domain part:
 
 ```python
 class Scrubbers:
-    email = scrubbers.Concat(scrubbers.Hash('email'), models.Value('@'), scrubbers.Faker('domain_name'))
+    email = scrubbers.Concat(scrubbers.Hash('email'), models.Value('@'), scrubbers.Faker('domain_name'), output_field=models.EmailField())
 ```
 
 ### Faker