Fixing UNB-1989 Fail early for custom model upload issues

Author: whoseoyster

CHANGELOG.md

@@ -5,7 +5,13 @@ 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
+## [Unreleased]
+
+### Fixed
+
+* Fail early if `custom_model_code` or `dependent_dir` are `None` when model type is `ModelType.custom`.
+
+## [0.2.0a0]
 
 ### Added
 

unboxapi/__init__.py

@@ -310,6 +310,13 @@ def add_model(
             assert (
                 model_type is ModelType.custom
             ), "model_type must be ModelType.custom if specifying custom_model_code"
+        if model_type is ModelType.custom:
+            assert (
+                custom_model_code is not None
+            ), "Must specify custom_model_code when using ModelType.custom"
+            assert (
+                dependent_dir is not None
+            ), "Must specify dependent_dir when using ModelType.custom"
         if task_type in [TaskType.TabularClassification, TaskType.TabularRegression]:
             required_fields = [
                 (feature_names, "feature_names"),