add Package SQLAlchemy ORM model

Additionally, add an optional **kwargs passing via make_relationship.
This allows us to use things like `uselist=False`, which was needed
for test/test_package.py.
Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/db.py

@@ -53,9 +53,10 @@ def make_random_value(table: str, column: str):
     return string
 
 
-def make_relationship(model, foreign_key, backref_):
+def make_relationship(model, foreign_key: str, backref_: str, **kwargs):
     return relationship(model, foreign_keys=[foreign_key],
-                        backref=backref(backref_, lazy="dynamic"))
+                        backref=backref(backref_, lazy="dynamic"),
+                        **kwargs)
 
 
 def query(model, *args, **kwargs):

aurweb/models/package.py

+from sqlalchemy.orm import mapper
+
+from aurweb.db import make_relationship
+from aurweb.models.package_base import PackageBase
+from aurweb.schema import Packages
+
+
+class Package:
+    def __init__(self,
+                 PackageBase: PackageBase = None,
+                 Name: str = None, Version: str = None,
+                 Description: str = None, URL: str = None):
+        self.PackageBase = PackageBase
+        self.Name = Name
+        self.Version = Version
+        self.Description = Description
+        self.URL = URL
+
+
+mapper(Package, Packages, properties={
+    "PackageBase": make_relationship(PackageBase,
+                                     Packages.c.PackageBaseID,
+                                     "package", uselist=False)
+})

test/test_package.py

+import pytest
+
+from sqlalchemy import and_
+from sqlalchemy.exc import IntegrityError
+
+from aurweb.db import create, query
+from aurweb.models.account_type import AccountType
+from aurweb.models.package import Package
+from aurweb.models.package_base import PackageBase
+from aurweb.models.user import User
+from aurweb.testing import setup_test_db
+
+user = pkgbase = package = None
+
+
+@pytest.fixture(autouse=True)
+def setup():
+    global user, pkgbase, package
+
+    setup_test_db("Users", "PackageBases", "Packages")
+
+    account_type = query(AccountType,
+                         AccountType.AccountType == "User").first()
+    user = create(User, Username="test", Email="test@example.org",
+                  RealName="Test User", Passwd="testPassword",
+                  AccountType=account_type)
+
+    pkgbase = create(PackageBase,
+                     Name="beautiful-package",
+                     Maintainer=user)
+    package = create(Package,
+                     PackageBase=pkgbase,
+                     Name=pkgbase.Name,
+                     Description="Test description.",
+                     URL="https://test.package")
+
+    yield package
+
+
+def test_package():
+    from aurweb.db import session
+
+    assert pkgbase == package.PackageBase
+    assert package.Name == "beautiful-package"
+    assert package.Description == "Test description."
+    assert package.Version == str()  # Default version.
+    assert package.URL == "https://test.package"
+
+    # Update package Version.
+    package.Version = "1.2.3"
+    session.commit()
+
+    # Make sure it got updated in the database.
+    record = query(Package,
+                   and_(Package.ID == package.ID,
+                        Package.Version == "1.2.3")).first()
+    assert record is not None
+
+
+def test_package_null_pkgbase_raises_exception():
+    from aurweb.db import session
+
+    with pytest.raises(IntegrityError):
+        create(Package,
+               Name="some-package",
+               Description="Some description.",
+               URL="https://some.package")
+    session.rollback()
+
+
+def test_package_null_name_raises_exception():
+    from aurweb.db import session
+
+    with pytest.raises(IntegrityError):
+        create(Package,
+               PackageBase=pkgbase,
+               Description="Some description.",
+               URL="https://some.package")
+    session.rollback()