Recurse query only adds most inner values to query variable

Users
1

I was playing around with Recurse Query and wanted to return all names in one level.

The query looks like this:

{
	recurse(func: gt(count(~genre), 30000), first: 1) {
		allUids as _uid_
		name@en
		~genre (first:10) @filter(gt(count(starring), 2))
		starring (first: 2)
		performance.actor
	}

	q (func: uid(allUids)) {
		name@en
	}
}

However, I wasn’t able to add var to recurse query to hide it’s result in the output. I tried:

recurse var(func: gt(count(~genre), 30000), first: 1) {

var recurse(func: gt(count(~genre), 30000), first: 1) {

Also, query result “q” contains only performance.actor names - genre names for example are left out.

The actual reason for this is that I need to perform a recursive delete and I thought that when I can get all these necessary uid values, then I can delete them.

Perhaps there is better option to delete recursively?

2

Hey @rait.raidma

I have an open PR Make recurse a directive by pawanrawal · Pull Request #1754 · dgraph-io/dgraph · GitHub to make recurse a directive. That would allow you to use it with a var root.

What you are doing seems correct regarding deleting nodes recursively. I will have to check why all names are not being returned and get back to you.

3

Something else I noticed is that this query only returns genre names.

{
	recurse(func: gt(count(~genre), 30000), first: 2) {
		names as name@en
		~genre (first:10) @filter(gt(count(starring), 2))
		starring (first: 2)
		performance.actor
	}

	q (func: uid(names)) {
		name@en
	}
}

And when I changed the first query by adding @cascade, then it helped to get rid of the values in recurse array.

recurse(func: gt(count(~genre), 30000), first: 1) @cascade {

returned

{
  "data": {
    "recurse": [],
    "q": [
// ...