如何使用orientjs查询构建器插入具有链接类型属性的顶点？

Question

I am trying to insert a vertex with orientjs(previously oriento) query builder. My class has a link type property pointing to another class.

I know I can get it to work with a raw query string but I would love to use the query builder.

Here is what I've tried so far :

db.insert()
.into('VertexClassName')
.set({"prop":"value", "linkProperty":"33:1289287"})

db.insert()
.into('VertexClassName')
.set({"prop":"value", "linkProperty":"#33:1289287"})

I get the following error :

Error on saving record in cluster #13

Am I setting properties in the right way ? Could the error be related to somtehing else ? I have sucessfully ran an insert query in the cluster #13 with a raw query string in the studio...

Answer 1

According to the official documentation it seems that the problem might be at the end of your statement

db.insert().into('VertexClassName')
    .set({"prop":"value", "linkProperty":"33:1289287"}).one()
    .then(function (data) {
       // callback
});

Check if your code works adding one() to the pipe line

EDITED : I found this method in orientjs.

db.create('VERTEX', 'V')
.set({
  key: 'value',
  foo: 'bar'
})
.one()
.then(function (vertex) {
  console.log('created vertex', vertex);
});

When using Tinkerpop API they recommend using createVertex instead of insert, because createVertex is intended for graphs and insert for Documents... Could you try with the create() method instead?

Answer 2

I am using SQL and it worked.

sql = "INSERT INTO Station set linked = (select from LinkedClass where LinkedProb = 'value'), prop = 'value'"

OrientVertex vertex = new OrientVertex();
vertex = graph.command(new OCommandSQL(sql)).execute();

Answer 3

I don't think that's possible unless you've added a proper field with the right type 'Link' in your schema. (which I rarely do).

Now instead of having the right 'link' type inserted you can do the opposite, store is as a String, and leverage the query functions to use it correctly:

db.insert().into('table').set({prop: '#15:14'}).one();

And it will be converted as String (which is a bit sad) but then you can use that in your queries:

SELECT eval(prop) FROM table; 

And it will be 'eval'-ed to a Node RecordID that you can directly use and call functions like expand() on.

For example:

SELECT name FROM (SELECT expand(eval(prop)) FROM table); 

Will eval the node stored in the insert(), grab the node, expand it and collect its name property.