Fail early for custom model on requirements and model

Author: whoseoyster

CHANGELOG.md

@@ -5,11 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.2.0a1]
 
 ### Fixed
 
-* Fail early if `custom_model_code` or `dependent_dir` are `None` when model type is `ModelType.custom`.
+* Fail early if `custom_model_code`, `dependent_dir` or `requirements_txt_file` are `None` when model type is `ModelType.custom`.
+* Fail early if `model` is not `None` when model type is `ModelType.custom`.
 
 ## [0.2.0a0]
 

unboxapi/__init__.py

@@ -317,6 +317,10 @@ def add_model(
             assert (
                 dependent_dir is not None
             ), "Must specify dependent_dir when using ModelType.custom"
+            assert (
+                requirements_txt_file is not None
+            ), "Must specify requirements_txt_file when using ModelType.custom"
+            assert model is None, "model must be None when using ModelType.custom"
         if task_type in [TaskType.TabularClassification, TaskType.TabularRegression]:
             required_fields = [
                 (feature_names, "feature_names"),