示例#1
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def define_images_table(meta):
    images = Table('images',
                   meta,
                   Column('id', Integer(), primary_key=True, nullable=False),
                   Column('name', String(255)),
                   Column('type', String(30)),
                   Column('size', Integer()),
                   Column('status', String(30), nullable=False),
                   Column('is_public',
                          Boolean(),
                          nullable=False,
                          default=False,
                          index=True),
                   Column('location', Text()),
                   Column('created_at', DateTime(), nullable=False),
                   Column('updated_at', DateTime()),
                   Column('deleted_at', DateTime()),
                   Column('deleted',
                          Boolean(),
                          nullable=False,
                          default=False,
                          index=True),
                   mysql_engine='InnoDB',
                   extend_existing=True)

    return images
示例#2
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def get_images_table(meta):
    """
    Returns the Table object for the images table that
    corresponds to the images table definition of this version.
    """
    images = Table('images',
                   meta,
                   Column('id', Integer(), primary_key=True, nullable=False),
                   Column('name', String(255)),
                   Column('disk_format', String(20)),
                   Column('container_format', String(20)),
                   Column('size', Integer()),
                   Column('status', String(30), nullable=False),
                   Column('is_public',
                          Boolean(),
                          nullable=False,
                          default=False,
                          index=True),
                   Column('location', Text()),
                   Column('created_at', DateTime(), nullable=False),
                   Column('updated_at', DateTime()),
                   Column('deleted_at', DateTime()),
                   Column('deleted',
                          Boolean(),
                          nullable=False,
                          default=False,
                          index=True),
                   Column('checksum', String(32)),
                   mysql_engine='InnoDB',
                   useexisting=True)

    return images
def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine
    (define_images_table, ) = from_migration_import('001_add_images_table',
                                                    ['define_images_table'])
    (define_image_properties_table, ) = from_migration_import(
        '002_add_image_properties_table', ['define_image_properties_table'])

    conn = migrate_engine.connect()
    images = define_images_table(meta)
    image_properties = define_image_properties_table(meta)

    # Steps to take, in this order:
    # 1) Move the existing type column from Image into
    #    ImageProperty for all image records that have a non-NULL
    #    type column
    # 2) Drop the type column in images
    # 3) Add the new columns to images

    # The below wackiness correlates to the following ANSI SQL:
    #   SELECT images.* FROM images
    #   LEFT JOIN image_properties
    #   ON images.id = image_properties.image_id
    #   AND image_properties.key = 'type'
    #   WHERE image_properties.image_id IS NULL
    #   AND images.type IS NOT NULL
    #
    # which returns all the images that have a type set
    # but that DO NOT yet have an image_property record
    # with key of type.
    sel = select([images],
                 from_obj=[
                     images.outerjoin(
                         image_properties,
                         and_(images.c.id == image_properties.c.image_id,
                              image_properties.c.key == 'type'))
                 ]).where(
                     and_(image_properties.c.image_id == None,
                          images.c.type != None))
    image_records = conn.execute(sel).fetchall()
    property_insert = image_properties.insert()
    for record in image_records:
        conn.execute(property_insert,
                     image_id=record.id,
                     key='type',
                     created_at=record.created_at,
                     deleted=False,
                     value=record.type)
    conn.close()

    disk_format = Column('disk_format', String(20))
    disk_format.create(images)
    container_format = Column('container_format', String(20))
    container_format.create(images)

    images.columns['type'].drop()
示例#4
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def get_image_properties_table(meta):
    """
    Returns the Table object for the image_properties table that
    corresponds to the image_properties table definition of this version.
    """
    (get_images_table,) = from_migration_import(
        '004_add_checksum', ['get_images_table'])

    images = get_images_table(meta)

    image_properties = Table('image_properties', meta,
        Column('id', Integer(), primary_key=True, nullable=False),
        Column('image_id', Integer(), ForeignKey('images.id'), nullable=False,
               index=True),
        Column('name', String(255), nullable=False),
        Column('value', Text()),
        Column('created_at', DateTime(), nullable=False),
        Column('updated_at', DateTime()),
        Column('deleted_at', DateTime()),
        Column('deleted', Boolean(), nullable=False, default=False,
               index=True),
        UniqueConstraint('image_id', 'name'),
        mysql_engine='InnoDB',
        useexisting=True)

    return image_properties
def get_image_members_table(meta):
    images = get_images_table(meta)

    image_members = Table('image_members',
                          meta,
                          Column('id',
                                 Integer(),
                                 primary_key=True,
                                 nullable=False),
                          Column('image_id',
                                 Integer(),
                                 ForeignKey('images.id'),
                                 nullable=False,
                                 index=True),
                          Column('member', String(255), nullable=False),
                          Column('can_share',
                                 Boolean(),
                                 nullable=False,
                                 default=False),
                          Column('created_at', DateTime(), nullable=False),
                          Column('updated_at', DateTime()),
                          Column('deleted_at', DateTime()),
                          Column('deleted',
                                 Boolean(),
                                 nullable=False,
                                 default=False,
                                 index=True),
                          UniqueConstraint('image_id', 'member'),
                          mysql_engine='InnoDB',
                          extend_existing=True)

    Index('ix_image_members_image_id_member', image_members.c.image_id,
          image_members.c.member)

    return image_members
示例#6
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def define_image_properties_table(meta):
    (define_images_table,) = from_migration_import(
        '001_add_images_table', ['define_images_table'])

    images = define_images_table(meta)

    image_properties = Table('image_properties', meta,
        Column('id', Integer(), primary_key=True, nullable=False),
        Column('image_id', Integer(), ForeignKey('images.id'), nullable=False,
               index=True),
        Column('key', String(255), nullable=False),
        Column('value', Text()),
        Column('created_at', DateTime(), nullable=False),
        Column('updated_at', DateTime()),
        Column('deleted_at', DateTime()),
        Column('deleted', Boolean(), nullable=False, default=False,
               index=True),
        UniqueConstraint('image_id', 'key'),
        mysql_engine='InnoDB',
        extend_existing=True)

    Index('ix_image_properties_image_id_key', image_properties.c.image_id,
          image_properties.c.key)

    return image_properties
def downgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine

    # Steps to take, in this order:
    # 1) Add type column back to Image
    # 2) Move the existing type properties from ImageProperty into
    #    Image.type
    # 3) Drop the disk_format and container_format columns in Image

    conn = migrate_engine.connect()
    images = get_images_table(meta)
    image_properties = get_image_properties_table(meta)

    type_col = Column('type', String(30))
    type_col.create(images)

    sel = select([image_properties]).where(image_properties.c.key == 'type')
    type_property_records = conn.execute(sel).fetchall()
    for record in type_property_records:
        upd = images.update().where(images.c.id == record.image_id).values(
            type=record.value)
        conn.execute(upd)
        dlt = image_properties.delete().where(
            image_properties.c.image_id == record.image_id)
        conn.execute(dlt)
    conn.close()

    images.columns['disk_format'].drop()
    images.columns['container_format'].drop()
示例#8
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def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine

    images = get_images_table(meta)

    checksum = Column('checksum', String(32))
    checksum.create(images)
示例#9
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def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine

    images = get_images_table(meta)

    owner = Column('owner', String(255))
    owner.create(images)