Question

我正在创造一个优势＆＃34; has_taken＆＃34;两份文件之间如下：

sin_graph.createEdge("has_taken", userDoc._id, tripDoc._id, edgeAttributes={})

我收到以下错误：

File "/Library/Python/2.7/site-packages/pyArango/graph.py", line 135, in createEdge raise CreationError("Unable to create edge, %s" % r.json()["errorMessage"], data) CreationError: Unable to create edge, collection not found. Errors: {u'code': 404, u'errorNum': 1203, u'errorMessage': u'collection not found', u'error': True}

名称为＆＃34; has_taken＆＃34;的集合存在，但我收到上述错误。

Answer 1

我已将social graph example示例转换为pyArango;它说明了用它维护图形数据时要做的事情的顺序：

#!/usr/bin/python
import sys
from pyArango.connection import *
from pyArango.graph import *
from pyArango.collection import *


class Social(object):
        class male(Collection) :
            _fields = {
                "name" : Field()
            }

        class female(Collection) :
            _fields = {
                "name" : Field()
            }

        class relation(Edges) :
            _fields = {
                "number" : Field()
            }

        class social(Graph) :

            _edgeDefinitions = (EdgeDefinition ('relation',
                                                fromCollections = ["female", "male"],
                                                toCollections = ["female", "male"]),)
            _orphanedCollections = []


        def __init__(self):
               self.conn = Connection(username="root", password="")

               self.db = self.conn["_system"]
               if self.db.hasGraph('social'):
                   raise Exception("The social graph was already provisioned! remove it first")

               self.female   = self.db.createCollection("female")
               self.male     = self.db.createCollection("male")

               self.relation = self.db.createCollection("relation")

               g = self.db.createGraph("social")

               a = g.createVertex('female', {"name": 'Alice',  "_key": 'alice'});
               b = g.createVertex('male',  {"name": 'Bob',    "_key": 'bob'});
               c = g.createVertex('male',   {"name": 'Charly', "_key": 'charly'});
               d = g.createVertex('female', {"name": 'Diana',  "_key": 'diana'});
               a.save()
               b.save()
               c.save()
               d.save()

               g.link('relation', a, b, {"type": 'married', "_key": 'aliceAndBob'})
               g.link('relation', a, c, {"type": 'friend', "_key": 'aliceAndCharly'})
               g.link('relation', c, d, {"type": 'married', "_key": 'charlyAndDiana'})
               g.link('relation', b, d, {"type": 'friend', "_key": 'bobAndDiana'})


Social()

Answer 2

我认为这可能是因为你制作了Collection类型的集合，而不是Edge类型的集合（哈哈，令人困惑，我知道。）

但是在制作名为“has_taken”的集合时，而不是

select course_id, group_concat(id) as ids
from t
group by course_id
having count(*) > 1;

尝试

db.createCollection(className="Collection", name="has_taken")

当我在阅读this页面时，我注意到了。（单击该链接时，请查看屏幕的最顶部。功能及其描述就在那里，它提到了这种差异。）

db.createCollection(className="Edges", name="has_taken")
创建一个集合并返回它。 ClassName是继承自Collection或Egdes的类的名称，它也可以设置为“Collection”或“Edges”，以便创建无类型的文档或边集合。

ArangoDB - 创建集合时未找到集合错误

2 个答案: