Arangodb: Can I call a user function from a user function?

Question

Since user-functions are not allowed to have side-effects with respect to the data, I wondered if it's possible to call one function from the other.

I want to factor out common calculations.

One possible way I see is to use

var result = db._query("RETURN myfuncs::func(@a1, @a2)",
                       {'@a1': 'val1', '@a2': 'val2}, null, null).next();

But I would like another way if possible.

stj · Accepted Answer · 2015-02-09 10:35:55Z

2

Each user function is completely standalone, meaning it is not possible to call a user function from within another.

This might change in the future, but this is the situation at the moment (ArangoDB 2.3/2.4/2.5).

answered Feb 9, 2015 at 10:35

stj

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2 Comments

That's unfortunate for our use case. I will make do with the db aproach

Just for the record: The db-way helped a lot during prototyping, now everything is ported to foxx.

Mira · Accepted Answer · 2016-11-30 11:41:51Z

1

I found the way how to do this. You can use db._query in user function, i.e.

var db = require('internal').db;
var resultFromOtherUserFunc = db._query('RETURN userFunction::MyFunction(@param)', {param: true}).toArray();

answered Nov 30, 2016 at 11:41

Mira

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That Solution/workaround is actually mentioned in my question ;-)