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

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python: Current File",
+            "type": "python",
+            "request": "launch",
+            "program": "${file}",
+            "console": "integratedTerminal"
+        }
+    ]
+}

.vscode/settings.json

@@ -7,6 +7,7 @@
         "pylint_flask",
         "pylint_flask_sqlalchemy",        
     ],
-    "python.pythonPath": "d:\\Software\\geomon\\.venv\\Scripts\\python.exe",
+    // "python.pythonPath": "d:\\Software\\geomon\\.venv\\Scripts\\python.exe",
+    "python.defaultInterpreterPath": "./.venv/Scripts/python.exe",
     "python.envFile": "${workspaceFolder}/.env"
 }

db/__init__.py

@@ -1,2 +1,3 @@
 # For relative imports to work in Python 3.6
 import os, sys; sys.path.append(os.path.dirname(os.path.realpath(__file__)))
+# print(f'Invoking __init__.py for {__name__}')

firebird_to_postgis_export.py

@@ -5,8 +5,8 @@ from typing import List
 import uuid
 from sqlalchemy.orm import session
 from sqlalchemy import func, desc, asc
-from fb_models import (create_session, FbObservation, Catena)
-from pg_models import (create_pg_session, Dataset, Observation, Procedure, Phenomenon, Platform)
+from db.fb_models import (create_session, FbObservation, Catena)
+from db.pg_models import (create_pg_session, Dataset, Observation, Procedure, Phenomenon, Platform)
 
 def main():
     """

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()

gschliefgraben_glasfaser/models.py

@@ -1,8 +1,9 @@
 '''
 Tutorial link: https://docs.sqlalchemy.org/en/latest/orm/tutorial.html
-Sqlalchemy version: 1.2.15
-Python version: 3.7
+Sqlalchemy version: 1.4.31
+Python version: 3.10
 '''
+#!/usr/bin/python# -*- coding: utf-8 -*-
 
 from datetime import datetime
 # from config import db, ma
@@ -14,24 +15,32 @@ from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import session
 from marshmallow import Schema
 from db.pg_models import create_pg_session
+from marshmallow_sqlalchemy import SQLAlchemyAutoSchema
 
 Base = declarative_base()
 
 
 class Person(Base):
     """ Platform class """
-    __tablename__ = 'person'
-    person_id = Column(Integer, primary_key=True)
-    lname = Column(String(32), index=True)
-    fname = Column(String(32))
-    timestamp = Column(DateTime, default=datetime.utcnow,
+    __tablename__ = 'accounts'
+    __table_args__ = {"schema": "gba"}
+    person_id = Column('id', Integer, primary_key=True)
+    lname = Column('last_name', String(255), index=True)
+    fname = Column('first_name', String(255))
+    login = Column(String(255))
+    timestamp = Column('updated_at', DateTime, default=datetime.utcnow,
                        onupdate=datetime.utcnow)
+    def __repr__(self):
+        return "<User(name='%s', lastname='%s')>" % (
+                                self.login, self.lname)
 
 
-class PersonSchema(Schema):
+class PersonSchema(SQLAlchemyAutoSchema):
     """ Platform class """
     class Meta:
         """ Platform class """
         model = Person
+        include_relationships = True
+        load_instance = True
         #pg_session: session = create_pg_session()
         sqla_session: session = create_pg_session()

notes.txt

@@ -28,9 +28,9 @@ Install python formatter:
 d:/Software/geomon/.venv/Scripts/python.exe -m pip install -U autopep8
 
 
-pip install fdb
-pip install sqlalchemy-firebird
-pip install psycopg2
+python -m pip install fdb
+python -m pip install sqlalchemy-firebird
+python -m pip install psycopg2
 
 Marshmallow provides functionality to serialize and deserialize Python objects as they flow out of and into our JSON-based REST API. Marshmallow converts Python class instances to objects that can be converted to JSON.
-pip install marshmallow-sqlalchemy marshmallowll 
+python -m pip install marshmallow-sqlalchemy marshmallow 

pg_models.py

@@ -1,169 +0,0 @@
-'''
-Tutorial link: https://docs.sqlalchemy.org/en/latest/orm/tutorial.html
-Sqlalchemy version: 1.2.15
-Python version: 3.7
-'''
-
-import os
-from sqlalchemy import (create_engine, Column, Integer,
-                        SmallInteger, String, ForeignKey, DateTime, Numeric)
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import sessionmaker, relationship
-import sqlalchemy.orm.session
-
-Base = declarative_base()
-
-
-class Platform(Base):
-    """ Platform class """
-    __tablename__ = 'platform'
-    __table_args__ = {"schema": "gba"}
-
-    id = Column('platform_id', Integer, primary_key=True)
-    identifier = Column('identifier', String)
-    sta_identifier = Column('sta_identifier', String)
-    name = Column('name', String)
-    # datasets = relationship('Dataset')
-    datasets = relationship('Dataset', back_populates="platform", lazy=True)
-
-    def __repr__(self):
-        return f'Platform {self.name}'
-
-
-class Phenomenon(Base):
-    """ phenomenon class """
-    __tablename__ = 'phenomenon'
-    __table_args__ = {"schema": "gba"}
-
-    id = Column('phenomenon_id', Integer, primary_key=True)
-    name = Column('name', String)
-    sta_identifier = Column('sta_identifier', String)
-    # datasets = relationship('Dataset')
-    datasets = relationship('Dataset', back_populates="phenomenon", lazy=True)
-
-    def __repr__(self):
-        return f'Phenomenon {self.name}'
-
-
-class Procedure(Base):
-    """ procedure class """
-    __tablename__ = 'procedure'
-    __table_args__ = {"schema": "gba"}
-
-    id = Column('procedure_id', Integer, primary_key=True)
-    name = Column('name', String)
-    sta_identifier = Column('sta_identifier', String)
-    # datasets = relationship('Dataset')
-    datasets = relationship('Dataset', back_populates="procedure", lazy=True)
-
-    def __repr__(self):
-        return f'Procedure {self.name}'
-
-
-class Dataset(Base):
-    """ dataset class """
-    __tablename__ = 'dataset'
-    __table_args__ = {"schema": "gba"}
-
-    id = Column('dataset_id', Integer, primary_key=True)
-    name = Column('name', String)
-    is_published = Column('is_published', SmallInteger)
-    is_hidden = Column('is_hidden', SmallInteger)
-    dataset_type = Column('dataset_type', String)
-    observation_type = Column('observation_type', String)
-    value_type = Column('value_type', String)
-
-    last_time = Column('last_time', DateTime)
-    last_value = Column('last_value', Numeric(20, 10))
-    fk_last_observation_id = Column(
-        'fk_last_observation_id',
-        Integer
-    )
-    # last_observation = relationship(
-    #     "Observation", foreign_keys=[fk_last_observation_id])
-
-    first_time = Column('first_time', DateTime)
-    first_value = Column('first_value', Numeric(20, 10))
-    fk_first_observation_id = Column(
-        'fk_first_observation_id',
-        Integer
-    )
-    # first_observation = relationship("Observation", foreign_keys=[
-    #                                  fk_first_observation_id])
-
-    observations = relationship(
-        'Observation', back_populates='dataset', lazy=True)
-
-    fk_procedure_id = Column('fk_procedure_id', Integer, ForeignKey(
-        'gba.procedure.procedure_id'), nullable=False)
-    # procedure = relationship("Procedure", lazy="joined")
-    procedure = relationship(
-        "Procedure", back_populates="datasets", lazy="joined")
-
-    fk_phenomenon_id = Column(
-        'fk_phenomenon_id', Integer, ForeignKey('gba.phenomenon.phenomenon_id'), nullable=False)
-    # phenomenon = relationship("Phenomenon", lazy="joined", foreign_keys=[fk_phenomenon_id])
-    phenomenon = relationship(
-        "Phenomenon", back_populates="datasets",  lazy="joined")
-
-    # fk_platform_id = Column(
-    #     'fk_platform_id', Integer, ForeignKey('gba.platform.platform_id'), nullable=True)
-    # # platform = relationship("Platform", lazy="joined", foreign_keys=[fk_platform_id])
-    fk_platform_id = Column('fk_platform_id', Integer, ForeignKey(
-        'gba.platform.platform_id'), nullable=True)
-    platform = relationship(
-        "Platform", back_populates="datasets",  lazy="joined")
-
-    def __repr__(self):
-        return f'Dataset {self.name}'
-
-
-class Observation(Base):
-    """ observation class """
-    __tablename__ = 'observation'
-    __table_args__ = {"schema": "gba"}
-
-    id = Column('observation_id', Integer, primary_key=True)
-    name = Column('name', String)
-    value_type = Column('value_type', String)
-    # pitch = Column('PITCH', String)
-    # roll = Column('ROLL', String)
-    sampling_time_start = Column('sampling_time_start', DateTime)
-    sampling_time_end = Column('sampling_time_end', DateTime)
-    result_time = Column('result_time', DateTime)
-    sta_identifier = Column('sta_identifier', String)
-    value_quantity = Column('value_quantity', Numeric(20, 10), nullable=False)
-
-    # fk_dataset_id = Column('fk_dataset_id', Integer,
-    #                        ForeignKey('gba.dataset.dataset_id'))
-    # dataset = relationship("Dataset", lazy="joined",
-    #                        foreign_keys=[fk_dataset_id])
-    fk_dataset_id = Column(Integer, ForeignKey(
-        'gba.dataset.dataset_id'), nullable=False)
-    dataset = relationship("Dataset", back_populates="observations")
-
-    def __repr__(self):
-        return f'Observation {self.name}'
-
-    # @property
-    # def result_time(self):
-    #     ''' Create a datetime object '''
-    #     start_datetime = datetime.datetime.combine(self.date, self.ora)
-    #     return start_datetime
-
-
-def create_pg_session() -> sqlalchemy.orm.sessionmaker:
-    """Return the sum of x and y."""
-    dbschema = ''
-    db_user = os.environ.get("POSTGIS_DBUSER")
-    db_password = os.environ.get("POSTGIS_DBPASSWORD")
-    db_url = os.environ.get("POSTGIS_DBURL")
-    engine = create_engine(
-        "postgresql+psycopg2://" + db_user + ":" + db_password + "@" + db_url,
-        connect_args={'options': '-csearch_path={}'.format(dbschema)},
-        isolation_level="READ UNCOMMITTED")
-    session_maker = sessionmaker(bind=engine)
-    session = session_maker()
-
-    Base.metadata.create_all(engine)
-    return session

setup.py

@@ -0,0 +1,5 @@
+from setuptools import setup, find_packages
+setup(
+    name = 'geomon',
+    packages = find_packages(),
+)