我正在使用 Grakn 1.8.1、python 3.6.8、grakn-client 1.8.1 和 grpcio 1.24.1。
我定义了一个简单的模式 (schema.gql) 只是为了执行测试：
define
nome sub attribute,
value string;
cpf_srfb sub attribute,
value string;
id_srfb sub attribute,
value string;
hops_de_contraparte sub attribute,
value string;
pessoa_fisica sub entity,
has nome,
has cpf_srfb,
has id_srfb,
has hops_de_contraparte;
该方案已使用 grakn 控制台正确加载，并且密钥空间称为“srfb”。
之后，我创建了一个仅包含一个实例的数据文件 (data.sql)：
insert $pf isa pessoa_fisica, has nome "GUSTAVO RIBEIRO SOARES PINTO", has cpf_srfb "***106887**", has id_srfb "***106887**GUSTAVO RIBEIRO SOARES PINTO", has hops_de_contraparte "5";
同样，使用 grakn-console 可以完美地加载数据。
当我通过控制台加载架构然后我尝试通过 python api 加载数据时会出现问题。
我的python脚本只是：
from grakn.client import GraknClient
uri = "localhost:48555"
keyspace = 'srfb'
filepath = 'C:\grakn\grakn_181\data.gql'
with open(filepath, mode='r') as file:
insert_query = file.read()
with GraknClient(uri) as client:
with client.session(keyspace) as session:
with session.transaction().write() as transaction:
transaction.query(insert_query)
transaction.commit()
那时，发生了一个我无法纠正的错误：
Traceback (most recent call last):
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\service\Session\util\Communicator.py", line 166, in _block_for_next
response = next(self._response_iterator)
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grpc\_channel.py", line 388, in __next__
return self._next()
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grpc\_channel.py", line 382, in _next
raise self
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
status = StatusCode.UNKNOWN
details = "grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'. Please check server logs for the stack trace."
debug_error_string = "{"created":"@1603911191.241000000","description":"Error received from peer ipv6:[::1]:48555","file":"src/core/lib/surface/call.cc","file_line":1055,"grpc_message":"grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'. Please check server logs for the stack trace.","grpc_status":2}"
>
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "teste.py", line 17, in <module>
transaction.commit()
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\client.py", line 160, in commit
self._tx_service.commit()
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\service\Session\TransactionService.py", line 54, in commit
self._communicator.single_request(request)
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\service\Session\util\Communicator.py", line 192, in single_request
return SingleResolver(self, request).get()
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\service\Session\util\Communicator.py", line 70, in get
response = self._communicator._block_for_next(self)
File "C:\Users\jorge\AppData\Local\Programs\Python\Python36\lib\site-packages\grakn\service\Session\util\Communicator.py", line 184, in _block_for_next
raise self._error
grakn.exception.GraknError.GraknError: Server/network error: <_Rendezvous of RPC that terminated with:
status = StatusCode.UNKNOWN
details = "grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'. Please check server logs for the stack trace."
debug_error_string = "{"created":"@1603911191.241000000","description":"Error received from peer ipv6:[::1]:48555","file":"src/core/lib/surface/call.cc","file_line":1055,"grpc_message":"grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'. Please check server logs for the stack trace.","grpc_status":2}"
>
generated from request: iter_req {
options {
}
query_iter_req {
query: "insert $pf isa pessoa_fisica, has nome \"GUSTAVO RIBEIRO SOARES PINTO\", has cpf_srfb \"***106887**\", has id_srfb \"***106887**GUSTAVO RIBEIRO SOARES PINTO\", has hops_de_contraparte \"5\";"
options {
}
}
}
grakn 日志显示以下记录：
2020-10-28 15:15:45,615 [grpc-request-handler-3] ERROR g.c.s.r.SessionService$TransactionListener - Runtime Exception in RPC TransactionListener:
java.util.concurrent.ExecutionException: grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at grakn.core.server.rpc.SessionService$TransactionListener.process(SessionService.java:319)
at grakn.core.server.rpc.SessionService$TransactionListener.onNext(SessionService.java:196)
at grakn.core.server.rpc.SessionService$TransactionListener.onNext(SessionService.java:156)
at io.grpc.stub.ServerCalls$StreamingServerCallHandler$StreamingServerCallListener.onMessage(ServerCalls.java:251)
at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messagesAvailableInternal(ServerCallImpl.java:309)
at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messagesAvailable(ServerCallImpl.java:292)
at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1MessagesAvailable.runInContext(ServerImpl.java:779)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: grakn.core.kb.graql.exception.GraqlSemanticException: hops_de_contraparte doesn't have an 'isa', a 'sub' or an 'id'
最初我认为属性的声明有问题，但事实并非如此，因为相同的插入可以通过控制台完美运行。
我该怎么做才能使用 python api？有谁知道我可能做错了什么？