Add created_by_id to jobs table.

The user logged in will be the user marked as creating the job.
The admin code already sends the created_by user when creating a job.

migrations/versions/0009_created_by_for_jobs.py

@@ -0,0 +1,34 @@
+"""empty message
+
+Revision ID: 0009_created_by_for_jobs
+Revises: 0008_archive_template
+Create Date: 2016-04-26 14:54:56.852642
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0009_created_by_for_jobs'
+down_revision = '0008_archive_template'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('jobs', sa.Column('created_by_id', postgresql.UUID(as_uuid=True), nullable=True))
+    op.create_index(op.f('ix_jobs_created_by_id'), 'jobs', ['created_by_id'], unique=False)
+    op.create_foreign_key(None, 'jobs', 'users', ['created_by_id'], ['id'])
+    op.get_bind()
+    op.execute('UPDATE jobs SET created_by_id = \
+                (SELECT user_id FROM user_to_service WHERE jobs.service_id = user_to_service.service_id LIMIT 1)')
+    op.alter_column('jobs', 'created_by_id', nullable=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(None, 'jobs', type_='foreignkey')
+    op.drop_index(op.f('ix_jobs_created_by_id'), table_name='jobs')
+    op.drop_column('jobs', 'created_by_id')
+    ### end Alembic commands ###