add object to array

[DDAGitHub]

Hello.
Help, please, I can't to find the solution.

There is the object
{
"_id" : "id1",
"data" : [
{
"jobs" : [
{
"title" : "t1",
"type" : "tt1",
"category" : "c1"
},
{
"title" : "t2",
"type" : "tt2",
"category" : "c2"
}
]
}
]
}
I want to add the third job to the jobs array.
doc:=FMongoWire.Get(mwCollectionPersons,dSelector);
d0:= JSON(doc['data'][0]);
jobs_ru:= d0['jobs'];
n:= VarArrayHighBound(jobs_ru,1)+1;
VarArrayRedim(jobs_ru, n+1);
jobs_ru[n]:=JSON(['title','t3','type','tt3']);

fMongoWire.Update(mwCollectionPersons,dSelector,doc);
I have found that this code does not increase length of jobs array:

Could you posible to help me?
With best regards,
Dmitry.

[stijnsanders]

I think you probably should look into the $push operator instead of posting a full update of the document.

fMongoWire.Update(mxCollectionPersons,dSelector,JSON(['$push{','data[0].jobs{','title','t3','type','tt3','}}']));

[DDAGitHub]

Thank you, I`ll try.

[stijnsanders]

Having a look at this one again, it may be 'data.0.jobs{' instead of 'data[0].jobs{'

[Skullwing]

Did you solve this? Nothing of the options above work for me, I can't even read data out of an array. Help pls, do you have an example on how to read data from an array?