MongoDB driver and Objects in Collections

[mm765]

Last one for today...

I tried using the mongo-driver and did a simple find({}) (find all) and got the following error:
**** EXCEPTION ****
TypeError: Cannot find function entrySet in object en.
at /opt/itk/libs/decaf-mongodb/lib/BSON.js:53 (deserialize)
at /opt/itk/libs/decaf-mongodb/lib/BSON.js:75 (anonymous)
at /usr/local/decaf/builtins/decaf.js:41 (anonymous)
at /opt/itk/libs/decaf-mongodb/lib/BSON.js:74 (anonymous)
at /usr/local/decaf/builtins/decaf.js:41 (anonymous)
at /opt/itk/libs/decaf-mongodb/lib/BSON.js:53 (deserialize)
at /opt/itk/libs/decaf-mongodb/lib/Cursor.js:217 (anonymous)
at server.js:21
at /usr/local/decaf/builtins/rhino.js:117 (anonymous)
at /usr/local/decaf/builtins/include.js:96 (includeFile)
at /usr/local/decaf/builtins/include.js:107 (anonymous)
at /usr/local/decaf/builtins/shell.js:72 (anonymous)
at /usr/local/decaf/builtins/shell.js:18
at /usr/local/decaf/builtins/rhino.js:117 (anonymous)
at /usr/local/decaf/builtins/include.js:96 (includeFile)
at /usr/local/decaf/builtins/include.js:107 (anonymous)
at /usr/local/decaf/builtins/all.js:160

The "en" in the error message lets me suspect that it has a problem with an object like
Name['en'] = 'Choice'
Name['de'] = 'Auswahl'
in the collection - using a different collection that does not have an Object like that, works.
Any idea ?

[mm765]

Oh , this doesn't happen on the find() but when i try to access the data, either using cursor.next() or cursor.toArray()

[mschwartz]

Are you creating the DB with decaf?

I really can't say what's going on for sure without seeing the code. The
data type of the element doesn't seem to be compatible with JavaScript.

On Tue, Jan 5, 2016 at 6:59 PM, mm765 notifications@github.com wrote:

Oh , this doesn't happen on the find() but when i try to access the data,
either using cursor.next() or cursor.toArray()

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#13 (comment).

[mm765]

No, it is an existing database from a project (which im basically trying to re-create with decaf), my mongodb-related code has only a few lines:

eMongoDB = require('libs/decaf-mongodb').MongoDB
eObjectID = require('libs/decaf-mongodb').ObjectId
db = new eMongoDB('databasename')
db.use('users')
cu = db.users.find({})
console.log 'Count', cu.count()
while(cu.hasNext())
data = cu.next()
console.log 'Cursor:', data.Name

[mm765]

Oh and the existing project also uses javascript (node.js, which i want to get rid of, because especially database access is a nightmare, codewise )

[mm765]

Ok, using the debugger, it seems as if there is a problem when there is an array within an object in the document.
The line from the database that creates the error (originating in Cursor.js: next() function, line ret=deserialize(ret); is:
{"Languages"; ["en"], "LoginName": "b", ....}
It seems as if it tries to handle the "en" as an object instead of as a string ?!

[mschwartz]

https://github.com/decafjs/decaf-mongodb/blob/master/lib/BSON.js#L47

You might step into deserialize() at that point and see where the logic is
failing.

d(o) inside deserialize() right away.

On Tue, Jan 5, 2016 at 7:57 PM, mm765 notifications@github.com wrote:

Ok, using the debugger, it seems as if there is a problem when there is an
array within an object in the document.
The line from the database that creates the error (originating in
Cursor.js: next() function, line ret=deserialize(ret); is:
{"Languages"; ["en"], "LoginName": "b", ....}
It seems as if it tries to handle the "en" as an object instead of as a
string ?!

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#13 (comment).

[mm765]

Callstack:
BSON.js: 53 (here it throws the exception)
BSON.js:75 (here, value is "en")
decaf.js:41

so it tries a deserialize on en which doesn't have an entrySet() function because it is a string.

BSON.js: 74 (here, elem is Languages=["en"], key is Languages and value ["en"]
decaf.js: 41 again
BSON.js: 53 again

[mschwartz]

Can you paste the output of d(o) into a message here?

On Tue, Jan 5, 2016 at 8:12 PM, mm765 notifications@github.com wrote:

Callstack:
BSON.js: 53 (here it throws the exception)
BSON.js:75 (here, value is "en")
decaf.js:41

so it tries a deserialize on en which doesn't have an entrySet() function
because it is a string.

BSON.js: 74 (here, elem is Languages=["en"], key is Languages and value
["en"]
decaf.js: 41 again
BSON.js: 53 again

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#13 (comment).

[mm765]

% d(o)
(JavaObject)
[getClass]
[toCharArray]
[wait]
[codePointAt]
[notifyAll]
[replace]
[regionMatches]
[replaceFirst]
[compareTo]
[replaceAll]
[getBytes]
[substring]
[notify]
[empty]
[split]
[trim]
[hashCode]
[toUpperCase]
[codePointBefore]
[equalsIgnoreCase]
[indexOf]
[class]
[compareToIgnoreCase]
[codePointCount]
[codePoints]
[intern]
[getChars]
[toLowerCase]
[contentEquals]
[length]
[isEmpty]
[concat]
[subSequence]
[matches]
[lastIndexOf]
[contains]
[bytes]
[equals]
[endsWith]
[toString]
[offsetByCodePoints]
[chars]
[charAt]
[startsWith]
[trimLeft]
[trimRight]
%

[mschwartz]

https://github.com/decafjs/decaf-mongodb/blob/master/lib/BSON.js#L47

At line 49, try adding this code:

if (!o.entrySet) {
return String(o);
}

On Tue, Jan 5, 2016 at 8:16 PM, mm765 notifications@github.com wrote:

% d(o)
(JavaObject)
[getClass]
[toCharArray]
[wait]
[codePointAt]
[notifyAll]
[replace]
[regionMatches]
[replaceFirst]
[compareTo]
[replaceAll]
[getBytes]
[substring]
[notify]
[empty]
[split]
[trim]
[hashCode]
[toUpperCase]
[codePointBefore]
[equalsIgnoreCase]
[indexOf]
[class]
[compareToIgnoreCase]
[codePointCount]
[codePoints]
[intern]
[getChars]
[toLowerCase]
[contentEquals]
[length]
[isEmpty]
[concat]
[subSequence]
[matches]
[lastIndexOf]
[contains]
[bytes]
[equals]
[endsWith]
[toString]
[offsetByCodePoints]
[chars]
[charAt]
[startsWith]
[trimLeft]
[trimRight]
%

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#13 (comment).

[mm765]

yes, that works

[mm765]

thanks

[mschwartz]

That may not be the 100% correct solution, but it should hold you over
until tomorrow when I can do the proper fix and push that code.

Maybe with this fix it won't work with array of numbers...

On Tue, Jan 5, 2016 at 8:23 PM, mm765 notifications@github.com wrote:

yes, that works

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#13 (comment).

[mm765]

Yeah, might be. One other thing - i just tried console.log(data.Languages) and got an error message: InternalError: Cannot convert org.mozilla.javascript.NativeArray@5ea434c8 to char

Works when i use console.log(data.Languages.toString()).
Is that a "decaf thing" or a "rhino thing" ?

[mm765]

Looks like rhino since decaf uses java.lang.system.out() ..
Thanks for your help, gtg.