arangodbpyarango

ArangoDB- duplicate edges

I am using pyArango to create edges between two documents using the function

Graph.createEdge()

The problem I am facing is that ArangoDB allows to create duplicate edges with the same _to, _from pair. How to avoid this situation in ArangoDB

Solution

  • An easy solution is to check before insertion using fetchFirstExample() on the edges collection:

    try :
  edge = myEdgesCollection.fetchFirstExample({"_to": doc2._id, "_from": doc1._id})[0]
except :
  edge = myGraph("myEdgesCollection", doc1, doc2, {})