- add marshmallow-sqlalchemy marshmallow for inserting db data via deserialization

gschliefgraben_glasfaser/main.py

@@ -1,15 +1,82 @@
 '''
 Tutorial link: https://realpython.com/flask-connexion-rest-api-part-2/
+https://github.com/realpython/materials/blob/master/flask-connexion-rest-part-2/version_1/people.py
 Sqlalchemy version: 1.2.15
 Python version: 3.7
 '''
 
 import os
+# import sys, inspect
+# currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+# parentdir = os.path.dirname(currentdir)
+# sys.path.insert(0, parentdir)
+from db.pg_models import create_pg_session
+from sqlalchemy.orm import session
+from gschliefgraben_glasfaser.models import PersonSchema
+from models import Person, PersonSchema
 # response = requests.get('https://api.com/')
 # print(response)  # shows the response's HTTP status code
 # print(response.json())  # shows the response's JSON response body, if it has one
 # print(response.content)  # get the data content of the response
-# (for your case this is the downloaded file)
-# print(dir(response))  # shows you all the different methods you can call on this response object
-db_user = os.environ.get("POSTGIS_DBUSER")
-print(db_user)
+
+
+def main():
+    # db_user = os.environ.get("POSTGIS_DBUSER")
+    # print(db_user)
+
+    pg_session: session = create_pg_session()
+    pg_person: Person = pg_session.query(Person).first()
+
+    # serialize db data to json
+    person_schema = PersonSchema()
+    dump_data = person_schema.dump(pg_person)
+    print(dump_data)
+
+    # deserialize
+    load_data: Person = person_schema.load(dump_data)
+    print(load_data)
+    create(dump_data)
+
+
+def create(person_json: PersonSchema):
+    """
+    This function creates a new person in the people structure
+    based on the passed-in person data
+    :param person:  person to create in people structure
+    :return:        201 on success, 406 on person exists
+    """
+
+    login = person_json.get('login')
+    #lname = person.get('lname')
+    session = create_pg_session()
+
+    # existing_person = Person.query \
+    #     .filter(Person.login == login) \
+    #     .one_or_none()
+    existing_person: bool = ( \
+        session.query(Person) \
+        .filter(Person.login == login)        
+        .one_or_none()
+    )
+
+    # Can we insert this person?
+    if existing_person is None:
+         # Create a person instance using the schema and the passed in person
+        schema = PersonSchema()
+        # deserialize to object
+        new_person: Person = schema.load(person_json)
+
+        # Add the person to the database        
+        session.add(new_person)
+        session.commit()
+
+        # Serialize and return the newly created person in the response
+        data = schema.dump(new_person)
+        return data, 201
+    # Otherwise, nope, person exists already
+    else:
+        print(409, f'Person {login} exists already')
+
+
+if __name__ == "__main__":
+    main()