Migrating to Meteor 1.7.0.4 : MongoDB : "updating the path ... would create a conflict at ..." - mongodb

Question

Im using meteor, and im trying to go from meteor 1.6 to 1.7
But im encountering errors im unable to get informations about in my tests :
tests.jpg
I get multiple things like this (some are maybe redondant, unused or obsolete) :
Error: Updating the path 'relationChangeRate' would create a conflict at 'relationChangeRate'
at Function.MongoError.create (C:\Users\fquesselaire\AppData\Local\.meteor\packages\npm-mongo\3.0.11\npm\node_modules\mongodb-core\lib\error.js:45:10)
at toError (C:\Users\fquesselaire\AppData\Local\.meteor\packages\npm-mongo\3.0.11\npm\node_modules\mongodb\lib\utils.js:149:22)
at C:\Users\fquesselaire\AppData\Local\.meteor\packages\npm-mongo\3.0.11\npm\node_modules\mongodb\lib\collection.js:1029:39
at C:\Users\fquesselaire\AppData\Local\.meteor\packages\npm-mongo\3.0.11\npm\node_modules\mongodb-core\lib\connection\pool.js:544:18
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickDomainCallback (internal/process/next_tick.js:218:9)
not occurring in 1.6.*
I tried upgrade my mongodb to 3.6.6, no effect.
Im also unable to get the entire stack in tests to see what is exactly enforcing.
my .meteor/versions :
255kb:meteor-status#1.5.0
accounts-base#1.4.2
accounts-password#1.5.1
akasha:fs-extra#0.26.3
alanning:roles#1.2.16
aldeed:autoform#6.3.0
aldeed:autoform-bs-button-group-input#2.0.0
aldeed:autoform-select2#3.0.1
aldeed:collection2-core#2.1.2
aldeed:template-extension#4.1.0
allow-deny#1.1.0
arillo:flow-router-helpers#0.5.2
autoupdate#1.4.1
babel-compiler#7.1.1
babel-runtime#1.2.4
base64#1.0.11
binary-heap#1.0.10
blaze#2.3.2
blaze-html-templates#1.1.2
blaze-tools#1.0.10
boilerplate-generator#1.5.0
caching-compiler#1.1.12
caching-html-compiler#1.1.3
callback-hook#1.1.0
check#1.3.1
coffeescript#1.0.17
cultofcoders:mocha#2.4.6
dburles:collection-helpers#1.1.0
dburles:factory#1.1.0
ddp#1.4.0
ddp-client#2.3.3
ddp-common#1.4.0
ddp-rate-limiter#1.0.7
ddp-server#2.2.0
deps#1.0.12
diff-sequence#1.1.0
dynamic-import#0.4.1
ecmascript#0.11.1
ecmascript-runtime#0.7.0
ecmascript-runtime-client#0.7.2
ecmascript-runtime-server#0.7.1
ejson#1.1.0
email#1.2.3
es5-shim#4.8.0
fourseven:scss#4.9.0
geojson-utils#1.0.10
hot-code-push#1.0.4
html-tools#1.0.11
htmljs#1.0.11
http#1.4.1
id-map#1.1.0
idmontie:migrations#1.0.3
jquery#1.11.11
kadira:blaze-layout#2.3.0
kadira:flow-router#2.12.1
lai:collection-extensions#0.2.1_1
launch-screen#1.1.1
livedata#1.0.18
lmieulet:meteor-coverage#1.1.4
localstorage#1.2.0
logging#1.1.20
matb33:collection-hooks#0.8.4
meteor#1.9.2
meteor-base#1.4.0
meteorhacks:picker#1.0.3
meteortesting:browser-tests#1.0.0
meteortesting:mocha#1.0.0
minifier-css#1.3.1
minifier-js#2.3.5
minimongo#1.4.4
mobile-experience#1.0.5
mobile-status-bar#1.0.14
modern-browsers#0.1.2
modules#0.12.2
modules-runtime#0.10.2
momentjs:moment#2.22.2
mongo#1.5.1
mongo-dev-server#1.1.0
mongo-id#1.0.7
mouse0270:bootstrap-notify#3.1.3
natestrauser:select2#4.0.3
npm-bcrypt#0.9.3
npm-mongo#3.0.11
observe-sequence#1.0.16
ordered-dict#1.1.0
ostrio:cookies#2.3.0
ostrio:files#1.10.1
practicalmeteor:chai#2.1.0_1
practicalmeteor:loglevel#1.2.0_2
practicalmeteor:mocha-core#1.0.1
practicalmeteor:sinon#1.14.1_2
promise#0.11.1
raix:eventemitter#0.1.3
random#1.1.0
rate-limit#1.0.9
reactive-dict#1.2.1
reactive-var#1.0.11
reload#1.2.0
retry#1.1.0
rocketchat:streamer#0.5.0
routepolicy#1.0.13
service-configuration#1.0.11
session#1.1.8
sewdn:collection-behaviours#0.3.0
sha#1.0.9
shell-server#0.3.1
socket-stream-client#0.2.2
softwarerero:accounts-t9n#1.3.11
spacebars#1.0.15
spacebars-compiler#1.1.3
srp#1.0.12
standard-minifier-css#1.4.1
standard-minifier-js#2.3.4
templating#1.3.2
templating-compiler#1.3.3
templating-runtime#1.3.2
templating-tools#1.1.2
tmeasday:check-npm-versions#0.3.2
tmeasday:test-reporter-helpers#0.2.1
tracker#1.2.0
ui#1.0.13
underscore#1.0.10
url#1.2.0
useraccounts:bootstrap#1.14.2
useraccounts:core#1.14.2
useraccounts:flow-routing#1.14.2
webapp#1.6.2
webapp-hashing#1.0.9
zimme:active-route#2.3.2
my node packages :
"dependencies": {
"#babel/runtime": "^7.0.0-beta.54",
"#mdi/font": "^2.5.94",
"babel-runtime": "^6.26.0",
"bcrypt": "^3.0.0",
"bootstrap": "^3.3.7",
"bootstrap-material-design": "^0.5.10",
"bootstrap-slider": "^10.0.2",
"bootstrap-toggle": "^2.2.2",
"clone": "^2.1.1",
"csv-parse": "^2.5.0",
"d3": "^5.5.0",
"file-saver": "^1.3.8",
"fs-extra": "^3.0.1",
"gm": "^1.23.0",
"jquery": "^2.2.4",
"jsondiffpatch": "^0.3.11",
"lodash": "^4.17.10",
"meteor-node-stubs": "^0.4.1",
"mkdirp": "^0.5.1",
"object-path": "^0.11.4",
"popper.js": "^1.14.3",
"select2": "^4.0.4",
"select2-bootstrap-theme": "^0.1.0-beta.10",
"simpl-schema": "^1.5.3",
"uuid": "^3.3.2",
"xmldoc": "^1.1.0",
"zip-local": "^0.3.4"
},
"devDependencies": {
"chromedriver": "^2.40.0",
"gulp": "^3.9.1",
"selenium-webdriver": "^3.6.0"
}
if you have any clue about what is going on ?
i can give more informations about what's happening in the app, but right now a simple explain about what this error mean would be awesome already. as i said, this error only append in 1.7.
EDIT: forget to say that my test throw this on WORKING code.
Features are working well, but not the tests.
EDIT²:
This method is the one that update the collection projectSettings.
_duplicateProjectSettings(newSession) {
const settings = this.session.projectSettings();
delete settings._id;
settings.sessionId = newSession._id;
const newSettings = newSession.projectSettings();
ProjectSettings.update(newSettings._id, { $set: settings });
}
relationChangeRate is a simpl-schema field of projectSettings collection as it (i use collection2-core) :
relationChangeRate: {
type: Number,
allowedValues: _.values(RelationRates),
defaultValue: 0.0
}
projectSettings extends mongo.collection, but in this case, update method is not override.
The code seams correct to me, as the _id is well removed and set to the new object before update request. but maybe im wrong ?
EDIT³:
ProjectSettings is a collection-helper:
Here is the code :
Sessions.helpers({
[...]
projectSettings() {
const conds = { sessionId: this._id };
return ProjectSettings.findOne(conds);
},
[...]
A collection helper basically add a method on each document from this collection. It means that any session object will have this method. In a collection helper, "this" refer to the current collection object.
so should be good ?
_duplicateProjectSettings could be write like this:
_duplicateProjectSettings(newSession) {
// const settings = this.session.projectSettings();
const settings = ProjectSettings.findOne({ sessionId: this.session._id });
delete settings._id;
settings.sessionId = newSession._id;
// const newSettings = newSession.projectSettings();
const newSettings = ProjectSettings.findOne({ sessionId: newSession._id });
ProjectSettings.update(newSettings._id, { $set: settings });
}
(I tried it too, same result)

Answer 1

Running this from shell worked for me... not the best solution. I had the problem when I tried to login with accounts-password package.
$ meteor mongo
meteor:PRIMARY> db.adminCommand( { setFeatureCompatibilityVersion: "3.4" } )

Answer 2

Ok,
This is an half-answer but
After some extended search i figured that i had a test script that reset MONGO_URL as follow :
set MONGO_URL=
set TEST_BROWSER_DRIVER=chrome
set TEST_WATCH=1
set TEST_CLIENT=0
set TEST_SERVER=1
meteor test -p 3100 --driver-package=cultofcoders:mocha %*
after figuring that i launched the tests on my local dev db, and tests passed (smashing my db by the way lol). So, it means it could be version related, or test-conditions related.
I am not able to print the version of mongodb used for tests, so i don't know the tests conditions exactly.
All i know is so :
Meteor "normal run" Mongo version : 3.6.4
My local Mongo version : 3.6.6