new_contents: """empty message
  
  Revision ID: 52b1ca9d63a
  Revises: 102bbf265d4
  Create Date: 2015-06-13 23:13:50.663764
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '52b1ca9d63a'
  down_revision = '102bbf265d4'
  
  from alembic import op
  import sqlalchemy as sa
  from sqlalchemy.dialects import postgresql
  
  def upgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.create_table('role',
      sa.Column('id', postgresql.UUID(), nullable=False),
      sa.Column('created_at', sa.DateTime(), nullable=True),
      sa.Column('updated_at', sa.DateTime(), nullable=True),
      sa.Column('name', sa.String(length=80), nullable=True),
      sa.PrimaryKeyConstraint('id'),
      sa.UniqueConstraint('name')
      )
      op.create_table('roles',
      sa.Column('role_id', postgresql.UUID(), nullable=True),
      sa.Column('user_id', postgresql.UUID(), nullable=True),
      sa.ForeignKeyConstraint(['role_id'], ['role.id'], ),
      sa.ForeignKeyConstraint(['user_id'], ['user.id'], )
      )
      ### end Alembic commands ###
  
  
  def downgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.drop_table('roles')
      op.drop_table('role')
      ### end Alembic commands ###
  
subject: add migration 52b1ca9d63a