mongodb insert from array fails

Question

I'm using MongoDB on ubuntu server. I would like to generate my documents in and store them in an array. After that I would like to insert these documents into my collection, but somehow the collection is always empty. It's important, that the data generation is seperated from the storage for measuring. I'm using javascript for that. However, that's some code:

for (i=0; i<amount; i++)
{                                           
doc = "datetime:" + Math.floor((1262300400+Math.random()%(1356994799-1262300400+1))) + sourceport: " + Math.floor((Math.random()*30000)+2000) ;
myarray[i]=doc;
}

...

for (n=0;n<=myarray.length-1;n++)
    {
        obj_doc = eval('{' + myarray[n] +'}');
        eval('var obj='+myarray[n]);
        obj_doc = '{' + myarray[n] +'}';
        db.mycol.insert(obj_doc);
    }

It doesn't even work without the rnd() function. db.mycol.stats() always returns "count:0"

JohnnyHK · Accepted Answer · 2012-12-11 01:20:05Z

1

Build up the docs to insert as objects, not strings and eval:

for (i=0; i<amount; i++) {                                           
    doc = {
        datetime: Math.floor((1262300400+Math.random()%(1356994799-1262300400+1))),
        sourceport: Math.floor((Math.random()*30000)+2000)
    };
    myarray[i]=doc;
}

...

db.mycol.insert(myarray);

answered Dec 11, 2012 at 1:20

JohnnyHK

313k70 gold badges632 silver badges479 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Tyzak Over a year ago

No error occurs, but there are still 0 elements in the collection

JohnnyHK Over a year ago

@Tyzak What's amount set to when you run this? I tried this in the mongo shell with amount = 50 and it did insert 50 docs.

Tyzak Over a year ago

hm my amount is 100 ... what is about strings? I added a string like mystring: "test" is that okay?

JohnnyHK Over a year ago

@Tyzak Sorry, I don't understand your question.

Tyzak Over a year ago

hm sorry, I tried it with the code above and with an additional item like test: "test" as a string. Both don't work somehow - the count of my collection stats is always:0 ... I don't understand that :<

|

Collectives™ on Stack Overflow

mongodb insert from array fails

1 Answer 1

7 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

7 Comments

Your Answer

Sign up or log in

Post as a guest

Related