add user_to_organisation and invited_organisation_users tables

similar to user_to_service and invited_users, but without auth types
or permissions

migrations/versions/0166_add_org_user_stuff.py

@@ -0,0 +1,53 @@
+"""
+
+Revision ID: 0166_add_org_user_stuff
+Revises: 0165_another_letter_org
+Create Date: 2018-02-14 17:25:11.747996
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision = '0166_add_org_user_stuff'
+down_revision = '0165_another_letter_org'
+
+
+def upgrade():
+    op.create_table('invite_status_type',
+        sa.Column('name', sa.String(), nullable=False),
+        sa.PrimaryKeyConstraint('name')
+    )
+
+    op.execute("insert into invite_status_type values ('pending'), ('accepted'), ('cancelled')")
+
+    op.create_table('invited_organisation_users',
+        sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column('email_address', sa.String(length=255), nullable=False),
+        sa.Column('invited_by_id', postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column('organisation_id', postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column('created_at', sa.DateTime(), nullable=False),
+        sa.Column('status', sa.String(), nullable=False),
+
+        sa.ForeignKeyConstraint(['invited_by_id'], ['users.id'], ),
+        sa.ForeignKeyConstraint(['organisation_id'], ['organisation.id'], ),
+        sa.ForeignKeyConstraint(['status'], ['invite_status_type.name'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+
+    op.create_table('user_to_organisation',
+        sa.Column('user_id', postgresql.UUID(as_uuid=True), nullable=True),
+        sa.Column('organisation_id', postgresql.UUID(as_uuid=True), nullable=True),
+
+        sa.ForeignKeyConstraint(['organisation_id'], ['organisation.id'], ),
+        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+        sa.UniqueConstraint('user_id', 'organisation_id', name='uix_user_to_organisation')
+    )
+
+    op.create_unique_constraint(None, 'organisation_to_service', columns=['service_id', 'organisation_id'])
+
+
+def downgrade():
+    op.drop_table('user_to_organisation')
+    op.drop_table('invited_organisation_users')
+    op.drop_table('invite_status_type')