Add migration for enforcing uniqueness of an application name within a portfolio and update create/update Applicaiton domain methods.

alembic/versions/c487d91f1a26_add_application_name_and_portfolio_id_.py

@@ -0,0 +1,28 @@
+"""add application name and portfolio_id unique constraint
+
+Revision ID: c487d91f1a26
+Revises: 3bd8552f1c57
+Create Date: 2019-12-13 14:33:23.952450
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'c487d91f1a26' # pragma: allowlist secret
+down_revision = '3bd8552f1c57' # pragma: allowlist secret
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_unique_constraint('name_portfolio_id_unique_constraint', 'applications', ['name', 'portfolio_id'])
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('name_portfolio_id_unique_constraint', 'applications', type_='unique')
+    # ### end Alembic commands ###