Now,how do i insert edge'data?

Issues Dgraph Clients
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1

Posted by lxwithgod:

v0.9.2
dgraphclient.newTransaction().query,this function can’t insert/delete data,
please tell me,how do i insert edge’data?

2

raitraidma commented :

To insert/delete, you must use mutate().

Insert using JSON:

DgraphClient.Transaction transaction = getDgraphClient().newTransaction();
DgraphProto.Mutation mutation = DgraphProto.Mutation.newBuilder()
    .setSetJson(ByteString.copyFromUtf8("[" +
        "{\"uid\":\"0x123\", \"name\":\"Tom\"}," +
        "{\"name\":\"Jane\"}]"))
    .build();
transaction.mutate(mutation);
transaction.commit();

However, I’m also curious how to insert data using DgraphProto.NQuad and how to use blank nodes with dgraph4j.

3

lxwithgod commented :

can you insert edge relationship?
DgraphClient.Transaction transaction = getDgraphClient().newTransaction();
DgraphProto.Mutation mutation = DgraphProto.Mutation.newBuilder()
.setSetJson(ByteString.copyFromUtf8(
“{“uid”:“0x123”, “call”:“0x124”}”))
.build();
transaction.mutate(mutation);
transaction.commit();

4

lxwithgod commented :

i meet a except:
io.dgraph.DgraphException: Input for predicate call of type uid is scalar

5

raitraidma commented :

They have added new tests that are helpful: https://github.com/dgraph-io/dgraph4j/blob/master/src/test/java/io/dgraph

6

deepakjois commented :

We have added some code in the tests folder which should illustrate the different scenarios. Hopefully they can guide you along in writing your own code to perform insertions.