Add cloud_id column to environment model

When an environment is created, we'll need to create something in the
CSP and keep track of the ID of the created thing.

alembic/versions/b3fa1493e0a9_add_cloud_id_column_to_environments.py

@@ -0,0 +1,28 @@
+"""Add cloud_id column to environments
+
+Revision ID: b3fa1493e0a9
+Revises: 6172ac7b8b26
+Create Date: 2019-01-04 14:28:59.660309
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'b3fa1493e0a9'
+down_revision = '6172ac7b8b26'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('environments', sa.Column('cloud_id', sa.String(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('environments', 'cloud_id')
+    # ### end Alembic commands ###

atst/models/environment.py

@@ -15,6 +15,8 @@ class Environment(Base, mixins.TimestampsMixin, mixins.AuditableMixin):
     project_id = Column(ForeignKey("projects.id"), nullable=False)
     project = relationship("Project")
 
+    cloud_id = Column(String)
+
     @property
     def users(self):
         return [r.user for r in self.roles]