Fix: improve FastAPI basemodel underscore handling

Author: IloBe

README.md

@@ -14,6 +14,9 @@
 [image12]: ./screenshots/MLOps_proj3_Render_webservice_live.PNG "render web service life"
 [image13]: ./screenshots/MLOps_proj3_Render_webservice_live_test_status.PNG "render web service test"
 [image14]: ./screenshots/live_post.png "render web service script result"
+[image15]: ./screenshots/render_auto-deploy_settings.PNG "render deploy settings"
+[image16]: ./screenshots/render_deployed_censusproject.PNG "render app deployed"
+[image17]: ./screenshots/render_deployed-app_browser-homepage.PNG "render app welcome"
 
 
 # US Census Data - Creating and Deploying a Classifier Pipeline as Web Service
@@ -152,7 +155,27 @@ As an examples regarding the use case of having a person earning <=50K as income
 
 * Because default render Python version is 3.7 and this version has issues with dvc, the environment variable PYTHON_VERSION has to be configured being version 3.10.9.
 * After selection, render starts its advanced deployment configuation, some parameters are already set, some have to be set manually appropriately. Render guides you through with easy to handle UI's.
-* That's it. Implement coding changes, push to the GitHub repository, and the app will automatically redeploy each time, but it will only deploy if your continuous integration action passes. 
+
+![render deploy settings][image15]
+
+<br>
+
+* That's it. Implement coding changes, push to the GitHub repository, and the app will automatically redeploy each time, but it will only deploy if your continuous integration action passes.
+
+![render app deployed][image16]
+
+<br>
+
+* Regarding the automatically created render census-project app link used as browser link
+  ```
+  https://census-project-xki0.onrender.com
+  ```
+  we get the welcome page message
+  
+![render app welcome][image17]
+
+<br>
+
 * Have in mind: if you rely on your CI/CD to fail before fixing an issue, it slows down your deployment. Fix issues early, e.g. by running an ensemble linter like flake8 locally before committing changes.
 * For checking the render deployment, a python file exists that uses the httpx module to do one GET and POST on the live render web service and prints its results. 
 

src/app/schemas.py

@@ -10,7 +10,7 @@
 # Imports
 ###################
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from typing import Optional
 from enum import Enum
 
@@ -19,6 +19,9 @@
 # Coding
 ###################
 
+def hyphen_to_underscore(field_name):
+    return f"{field_name}".replace("_", "-")
+
 class FeatureLabels(str, Enum):
     ''' Delivers the feature names as needed in Python '''
     age = "age"
@@ -39,17 +42,36 @@ class FeatureLabels(str, Enum):
 
 class Person(BaseModel):
     ''' Delivers the type hints for feature attributes '''
-    age: int
-    workclass: Optional[str] = None
-    fnlgt: int
-    education: Optional[str] = None
-    education_num: int
-    marital_status: Optional[str] = None
-    occupation: Optional[str] = None
-    relationship: Optional[str] = None
-    race: Optional[str] = None
-    sex: Optional[str] = None
-    capital_gain: int
-    capital_loss: int
-    hours_per_week: int
-    native_country: Optional[str] = None
+#    age: int
+#    workclass: Optional[str] = None
+#    fnlgt: int
+#    education: Optional[str] = None
+#    education_num: int
+#    marital_status: Optional[str] = None
+#    occupation: Optional[str] = None
+#    relationship: Optional[str] = None
+#    race: Optional[str] = None
+#    sex: Optional[str] = None
+#    capital_gain: int
+#    capital_loss: int
+#    hours_per_week: int
+#    native_country: Optional[str] = None
+
+    age: int = Field(..., example=45)
+    capital_gain: int = Field(..., example=2174)
+    capital_loss: int = Field(..., example=0)
+    education: str = Field(..., example="Bachelors")
+    education_num: int = Field(..., example=13)
+    fnlgt: int = Field(..., example=2334)
+    hours_per_week: int = Field(..., example=60)
+    marital_status: str = Field(..., example="Never-married")
+    native_country: str = Field(..., example="Cuba")
+    occupation: str = Field(..., example="Prof-specialty")
+    race: str = Field(..., example="Black")
+    relationship: str = Field(..., example="Wife")
+    sex: str = Field(..., example="Female")
+    workclass: str = Field(..., example="State-gov")
+
+    class Config:
+        alias_generator = hyphen_to_underscore
+        allow_population_by_field_name = True