text: """Add event roles table
  
  Revision ID: f1eee7b4880a
  Revises:
  Create Date: 2017-09-05 14:45:28.673606
  """
  
  import sqlalchemy as sa
  from alembic import op
  
  
  # revision identifiers, used by Alembic.
  revision = 'f1eee7b4880a'
  down_revision = None
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      op.create_table(
          'roles',
          sa.Column('id', sa.Integer(), nullable=False),
          sa.Column('event_id', sa.Integer(), nullable=False, index=True),
          sa.Column('name', sa.String(), nullable=False),
          sa.Column('code', sa.String(), nullable=False),
          sa.Column('color', sa.String(), nullable=False),
          sa.Index(None, 'event_id', 'code', unique=True),
          sa.CheckConstraint('code = upper(code)', name='uppercase_code'),
          sa.ForeignKeyConstraint(['event_id'], ['events.events.id']),
          sa.PrimaryKeyConstraint('id'),
          schema='events'
      )
      op.create_table(
          'role_members',
          sa.Column('role_id', sa.Integer(), nullable=False, index=True),
          sa.Column('user_id', sa.Integer(), nullable=False, index=True),
          sa.ForeignKeyConstraint(['role_id'], ['events.roles.id']),
          sa.ForeignKeyConstraint(['user_id'], ['users.users.id']),
          sa.PrimaryKeyConstraint('role_id', 'user_id'),
          schema='events'
      )
  
  
  def downgrade():
      op.drop_table('role_members', schema='events')
      op.drop_table('roles', schema='events')
  