From 057c6fd66f916c81d71bd02796e2c0427a5c012f Mon Sep 17 00:00:00 2001
From: Ben <kimaniben14@gmail.com>
Date: Wed, 24 Jul 2024 21:27:00 +0100
Subject: [PATCH] updated the code

---
 alembic.ini                             | 102 ++++++++++++++++++++++++
 alembic/README                          |   1 +
 alembic/__pycache__/env.cpython-310.pyc | Bin 0 -> 1729 bytes
 alembic/env.py                          |  73 +++++++++++++++++
 alembic/script.py.mako                  |  24 ++++++
 lib/debug.py                            |  26 ++++--
 lib/models.py                           |  70 ++++++++++++----
 lib/seed.py                             |  28 ++++++-
 8 files changed, 299 insertions(+), 25 deletions(-)
 create mode 100644 alembic.ini
 create mode 100644 alembic/README
 create mode 100644 alembic/__pycache__/env.cpython-310.pyc
 create mode 100644 alembic/env.py
 create mode 100644 alembic/script.py.mako

diff --git a/alembic.ini b/alembic.ini
new file mode 100644
index 000000000..cd10212e7
--- /dev/null
+++ b/alembic.ini
@@ -0,0 +1,102 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:alembic/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# Database URL - update this to point to your SQLite database
+sqlalchemy.url = sqlite:///freebies.db
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
diff --git a/alembic/README b/alembic/README
new file mode 100644
index 000000000..98e4f9c44
--- /dev/null
+++ b/alembic/README
@@ -0,0 +1 @@
+Generic single-database configuration.
\ No newline at end of file
diff --git a/alembic/__pycache__/env.cpython-310.pyc b/alembic/__pycache__/env.cpython-310.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..0b745e14c2e072d030ba990bfc26457fb4a1f1d9
GIT binary patch
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diff --git a/alembic/env.py b/alembic/env.py
new file mode 100644
index 000000000..bb736e550
--- /dev/null
+++ b/alembic/env.py
@@ -0,0 +1,73 @@
+from logging.config import fileConfig
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from models import Base  # Adjust the import based on your project structure
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well. By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
diff --git a/alembic/script.py.mako b/alembic/script.py.mako
new file mode 100644
index 000000000..2c0156303
--- /dev/null
+++ b/alembic/script.py.mako
@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}
diff --git a/lib/debug.py b/lib/debug.py
index 4f922eb69..fc9272e57 100644
--- a/lib/debug.py
+++ b/lib/debug.py
@@ -1,9 +1,23 @@
-#!/usr/bin/env python3
+# debug.py
 
-from sqlalchemy import create_engine
+from models import session, Company, Dev, Freebie
 
-from models import Company, Dev
+# Create sample data
+google = session.query(Company).filter_by(name="Google").first()
+alice = session.query(Dev).filter_by(name="Alice").first()
+bob = session.query(Dev).filter_by(name="Bob").first()
 
-if __name__ == '__main__':
-    engine = create_engine('sqlite:///freebies.db')
-    import ipdb; ipdb.set_trace()
+# Test relationships
+print(google.freebies)          # Should return a list of freebies from Google
+print(alice.companies)          # Should return a list of companies Alice received freebies from
+
+# Test methods
+google.give_freebie(alice, "Hat", 15)
+print(google.freebies)          # Should include the new freebie "Hat"
+print(alice.received_one("Hat"))  # Should return True
+
+freebie = session.query(Freebie).filter_by(item_name="Hat").first()
+print(freebie.print_details())  # Should print "Alice owns a Hat from Google"
+
+alice.give_away(bob, freebie)
+print(freebie.print_details())  # Should print "Bob owns a Hat from Google"
diff --git a/lib/models.py b/lib/models.py
index 2681bee5a..6be6cab50 100644
--- a/lib/models.py
+++ b/lib/models.py
@@ -1,29 +1,65 @@
-from sqlalchemy import ForeignKey, Column, Integer, String, MetaData
-from sqlalchemy.orm import relationship, backref
-from sqlalchemy.ext.declarative import declarative_base
+# models.py
 
-convention = {
-    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
-}
-metadata = MetaData(naming_convention=convention)
+from sqlalchemy import create_engine, Column, Integer, String, ForeignKey
+from sqlalchemy.orm import sessionmaker, relationship, backref, declarative_base
 
-Base = declarative_base(metadata=metadata)
+Base = declarative_base()
+engine = create_engine('postgresql://user:password@localhost/freebie_db')
+Session = sessionmaker(bind=engine)
+session = Session()
 
 class Company(Base):
     __tablename__ = 'companies'
 
-    id = Column(Integer(), primary_key=True)
-    name = Column(String())
-    founding_year = Column(Integer())
+    id = Column(Integer, primary_key=True)
+    name = Column(String, nullable=False)
+    founding_year = Column(Integer, nullable=False)
 
-    def __repr__(self):
-        return f'<Company {self.name}>'
+    freebies = relationship('Freebie', backref='company', lazy=True)
+
+    @property
+    def devs(self):
+        return list(set([freebie.dev for freebie in self.freebies]))
+
+    def give_freebie(self, dev, item_name, value):
+        new_freebie = Freebie(item_name=item_name, value=value, dev=dev, company=self)
+        session.add(new_freebie)
+        session.commit()
+
+    @classmethod
+    def oldest_company(cls):
+        return session.query(cls).order_by(cls.founding_year).first()
 
 class Dev(Base):
     __tablename__ = 'devs'
 
-    id = Column(Integer(), primary_key=True)
-    name= Column(String())
+    id = Column(Integer, primary_key=True)
+    name = Column(String, nullable=False)
+
+    freebies = relationship('Freebie', backref='dev', lazy=True)
+
+    @property
+    def companies(self):
+        return list(set([freebie.company for freebie in self.freebies]))
+
+    def received_one(self, item_name):
+        return any(freebie.item_name == item_name for freebie in self.freebies)
+
+    def give_away(self, dev, freebie):
+        if freebie in self.freebies:
+            freebie.dev = dev
+            session.commit()
+
+class Freebie(Base):
+    __tablename__ = 'freebies'
+
+    id = Column(Integer, primary_key=True)
+    item_name = Column(String, nullable=False)
+    value = Column(Integer, nullable=False)
+    dev_id = Column(Integer, ForeignKey('devs.id'), nullable=False)
+    company_id = Column(Integer, ForeignKey('companies.id'), nullable=False)
+
+    def print_details(self):
+        return f"{self.dev.name} owns a {self.item_name} from {self.company.name}"
 
-    def __repr__(self):
-        return f'<Dev {self.name}>'
+Base.metadata.create_all(engine)
diff --git a/lib/seed.py b/lib/seed.py
index b16becbbb..1c4a67e1f 100644
--- a/lib/seed.py
+++ b/lib/seed.py
@@ -1,3 +1,27 @@
-#!/usr/bin/env python3
+# seed.py
 
-# Script goes here!
+from models import session, Company, Dev, Freebie
+
+def seed_data():
+    session.query(Freebie).delete()
+    session.query(Company).delete()
+    session.query(Dev).delete()
+    session.commit()
+
+    google = Company(name="Google", founding_year=1998)
+    amazon = Company(name="Amazon", founding_year=1994)
+    facebook = Company(name="Facebook", founding_year=2004)
+
+    dev1 = Dev(name="Alice")
+    dev2 = Dev(name="Bob")
+    dev3 = Dev(name="Charlie")
+
+    session.add_all([google, amazon, facebook, dev1, dev2, dev3])
+    session.commit()
+
+    freebie1 = Freebie(item_name="T-shirt", value=10, dev=dev1, company=google)
+    freebie2 = Freebie(item_name="Mug", value=5, dev=dev2, company=amazon)
+    freebie3 = Freebie(item_name="Sticker", value=1, dev=dev3, company=facebook)
+
+    session.add_all([freebie1, freebie2, freebie3])
+    session