PyOrientCommandException: - :同时测试是否存在类#221

时间:2017-01-11 16:21:31

标签: pyorient

这是pyorient github中已关闭的问题#211的摘录。虽然,它可能有一些已经答案,但我在这里发布了这个,因为错误不是不言而喻的,并提供了使用pyorient和测试类的存在的示例。 所以这是摘录:

我正在测试如何查询类的存在,所以我正在使用动态db作为GRAPH example here

PyOrientCommandException:  - 

然后, 使用db_name'动物'查询数据库时我收到了以下异常响应(在此处未描述的其他情况下也会发生):

sql_query = "SELECT FROM ( SELECT expand( classes ) FROM metadata:schema ) WHERE name = '{}')".format('Animal')
client.query(sql_query)

我的查询测试是否存在类:

---------------------------------------------------------------------------
PyOrientCommandException                  Traceback (most recent call last)
<ipython-input-21-a6b7ac6435cb> in <module>()
----> 1 client.query(sql_query)

/home/jo/anaconda3/envs/aenv/lib/python3.5/site-packages/pyorient/orient.py in query(self, *args)
    417     def query(self, *args):
    418         return self.get_message("CommandMessage") \
--> 419             .prepare(( QUERY_SYNC, ) + args).send().fetch_response()
    420 
    421     def query_async(self, *args):

/home/jo/anaconda3/envs/aenv/lib/python3.5/site-packages/pyorient/messages/commands.py in fetch_response(self)
    142 
    143         # decode header only
--> 144         super( CommandMessage, self ).fetch_response()
    145 
    146         if self._command_type == QUERY_ASYNC:

/home/jo/anaconda3/envs/aenv/lib/python3.5/site-packages/pyorient/messages/base.py in fetch_response(self, *_continue)
    259         # already fetched, get last results as cache info
    260         elif len(self._body) is 0:
--> 261             self._decode_all()
    262             self.dump_streams()
    263         return self._body

/home/jo/anaconda3/envs/aenv/lib/python3.5/site-packages/pyorient/messages/base.py in _decode_all(self)
    243 
    244     def _decode_all(self):
--> 245         self._decode_header()
    246         self._decode_body()
    247 

/home/jo/anaconda3/envs/aenv/lib/python3.5/site-packages/pyorient/messages/base.py in _decode_header(self)
    176             raise PyOrientCommandException(
    177                 exception_class.decode( 'utf8' ),
--> 178                 [ exception_message.decode( 'utf8' ) ]
    179             )
    180 

PyOrientCommandException:  - 

完整输出错误:

utf8
是否会像获得一个影子一样?解码无法识别的$stat = $this->db->prepare('INSERT INTO students (sName, phone, email, image) VALUES (:sName, :phone, :email, :img)'); 字符? 我正在使用Jupyter笔记本上的代码运行Ubuntu 16.04,ANACONDA python发行版3.5,pyorient v.1.4.9

任何帮助?

1 个答案:

答案 0 :(得分:0)

我在查询中发现了一个错误,即添加了一个额外的括号'('

sql_query_with_error = "SELECT FROM ( SELECT expand( classes ) FROM metadata:schema ) WHERE name = '{}')".format('Animal')

正确的版本:

sql_query = "SELECT FROM ( SELECT expand( classes ) FROM metadata:schema ) WHERE name = '{}'".format('Animal')

但现在我有一个timeout: timed没有任何结果。

超时似乎与使用:

有关
client.set_session_token(True)

而不是查询。我在笔记本中重新启动内核并再次运行脚本,现在我得到了预期的结果:

result = client.query("SELECT FROM ( SELECT expand( classes ) FROM metadata:schema ) WHERE name = 'Animal'")[0]
result.oRecordData

结果输出:

{'abstract': False,
 'clusterIds': [17, 18, 19, 20],
 'clusterSelection': 'round-robin',
 'customFields': None,
 'defaultClusterId': 17,
 'description': None,
 'name': 'Animal',
 'overSize': 0.0,
 'properties': [],
 'shortName': None,
 'strictMode': False,
 'superClass': 'V',
 'superClasses': ['V']}

所以我想我需要更新令牌以持续更长时间