b79d2fcafd88_comment_text.py 文件源码

def downgrade():
    for prefix in TABLE_PREFIXES:
        op.alter_column(prefix + '_comments', 'text',
                   existing_type=mysql.TEXT(collation='utf8mb4_bin'),
                   type_=mysql.VARCHAR(charset='utf8mb4', collation='utf8mb4_bin', length=255),
                   existing_nullable=False)