topic Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required. in ArcGIS Online Questions

Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

AidanDonnelly — Wed, 04 Nov 2020 18:49:48 GMT

Hello,

I'm receiving a strange error when I try to run extractChanges on some of my Hosted Feature Services. I'm pretty new to using the REST API but had everything working yesterday via Integromat HTTP requests and JSON.

Sync is turned off on this service as well as the others that are experiencing the issue, but change tracking is turned on.

Thanks for any help.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Thu, 18 Feb 2021 18:53:11 GMT

Were you able to resolve this issue?

When Posting the extractChanges via Power Automate, the job ID returned always leads to the Invalid Sync error. When I submit via the Services Directory the job ID leads to a successful status and I get the edits back via JSON.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

julian_svcs — Thu, 25 Feb 2021 16:09:01 GMT

I was also getting this. Turns out my layerServerGens string was incorrect. Make sure you only take the value for layerServerGens in the service's changeTrackingInfo. It should look like this:

[ { "id" : 0, "minServerGen" : 1362600, "serverGen" : 1362600 }, { "id" : 1, "minServerGen" : 1362600, "serverGen" : 1362600 }, { "id" : 2, "minServerGen" : 1362600, "serverGen" : 1362600 } ]

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Wed, 07 Jul 2021 18:05:50 GMT

Hello,

Were you able to get it to work on Power automate? Any work around?

Thanks,

Julie

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Mon, 12 Jul 2021 15:30:59 GMT

Hello

I don't recall what my initial issue was but was able to get it working.

This is showing a POST to the Extract Changes endpoint: https://services1.arcgis.com/<yourOrgID>/ArcGIS/rest/services/Addresses/FeatureServer/extractChanges

The response includes the statusUrl property with a job ID: https://services1.arcgis.com/<yourOrgID>/ArcGIS/rest/services/Addresses/FeatureServer/jobs/9edaa7a1-4fce-4b69-a521-3example9

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Wed, 28 Jul 2021 14:28:42 GMT

Hey @PhilLarkin1 ,

When I send the Statusurl along with the generated token, I get an error saying ' The length of the URL for this request exceeds the configured maxUrlLength value.'. I am using HTTP connect with GET and sending the StatusUrl&token=generated token.

Did you experience anything similar? Wonder where I am going wrong with Power Automate.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Wed, 28 Jul 2021 15:00:41 GMT

Try using POST to the FeatureServer/jobs/<guid> endpoint. Your token and format key/values should be sent as queries.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Wed, 28 Jul 2021 16:16:11 GMT

Yes, I tried that. That leads me to 'Unable to synchronize replica. Invalid Sync model type. syncLayers json object is required.' The feature service has the sync option disabled but I get the same error when it is enabled too.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Wed, 28 Jul 2021 16:37:44 GMT

Congratulations! You've at least overcome the issue resulting from the GET to FeatureServer. I'd keep sending it as POST.

Does the result of the post to the FeatureServer/jobs/<guid> endpoint throw that error, or does it happen at an earlier step? This should be occurring at the extractChanges endpoint, which should happen after you get the changes URL.

One troubleshooting step is to walk through the calls to AGS manually.

Have you tried manually entering info from the services endpoint?

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Wed, 28 Jul 2021 19:01:56 GMT

When I do it manually from the REST api, I am able to get the json file fine. In a browse, the statusUrl with token gives me maxUrlLength value error. In PA, I am able to send the changeurl to receive statusurl fine but when I send statusUrl using GET, it gives the maxUrlError and POST gives me Invalid Sync model type error.

Wonder what I am missing . Appreciate your time!!

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Wed, 28 Jul 2021 19:13:25 GMT

Maybe your statusUrl is invalid.

I had some issues when my query values were not setup properly on my POST to /extractChanges. Try sending returnInserts, ReturnUpdates, and returnDeletes if these are valid operations on your Feature Service. You might also want to leave your layers value empty if you are only processing edits from a single layer. Worked for me.

Example Query:

{ "token": "5Dtmq06...", "f": "json", "layers": "", "returnInserts": "false", "returnUpdates": "false", "returnDeletes": "true", "serverGens": "[1949280,1949301]", "dataFormat": "json", "returnAttachmentsDataByUrl": "true" }

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Wed, 28 Jul 2021 19:50:23 GMT

yes that's possibility. I don't fully understand what's happening behind the scene I guess.

[servergen] is part of the changeurl so when you are sending POST changeUrl, how are you extracting servergen array in the query? am I making sense at all?

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Wed, 28 Jul 2021 20:53:24 GMT

I use two formulas to pull it from the WebHook payload

Strip_Query_Params JSON (from the payload)

last(split(body('Edit_Payload_Metadata_JSON')?['changesUrl'],'?'))

Variable holding serverGens ids:

last(split(first(split(outputs('Strip_Query_Params'),'&')),'='))

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Thu, 29 Jul 2021 16:51:01 GMT

Hey Phil,

Thanks for your time, some progress here. When I manually plugged in serverGens in query, it returned the resultsUrl without an error. having said that when I plugged in your formula to extract serverGens, I get 'expression is invalid.

I see you have two formulae and in the second one you are accessing the value of Strip_Query_Params. Do I put both formulae in fx expressions?

my changesUrl looks like this-

https://*****.arcgis.com/********/arcgis/rest/services/Equipment_testwebhooks/FeatureServer/extractChanges?serverGens=[278117616,278117833]&async=true&returnInserts=false&returnDeletes=false&returnAttachments=false

If I put just one formula then it says "'The template validation failed: 'The template action 'Sendchangesurl' at line '1' and column '2918' is not valid: "The template function 'body' is not expected at this location.".'.'."

last(split(first(split(outputs(body('Parse_JSON')?['changesUrl']),'&')),'='))

It looks like it is looking for a variable with changesurl. Thanks to you, I am pretty close but not there yet 🙂 Please let me know your thoughts.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Thu, 29 Jul 2021 16:59:58 GMT

I recommend reviewing some documentation on Parse JSON. If it doesn't make sense or you get stuck create a new Question on this forum.

https://techcommunity.microsoft.com/t5/microsoft-365-pnp-blog/how-to-use-parse-json-action-in-power-automate/ba-p/2121861

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Thu, 29 Jul 2021 17:23:21 GMT

Hey Phil,

yes I figured it. I created two compose to extract the values and that seems to have done it..phew. Yes, thanks for sharing the documentation, I'll look into it for a better understanding.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Thu, 29 Jul 2021 18:51:37 GMT

Hey Phil,

Sorry to bother you again. Now that I have the .json file in the result url, I am trying to send a GET on HTTP connector. Is that the correct process? I get a redirect error saying object is moved to argisazureprod.blob 😞

any thought Phil ??

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

PhilLarkin1 — Thu, 29 Jul 2021 19:22:48 GMT

As I mentioned before, it would be best to create a new question. There are some resources on this forum to answer this question. Here is a question I posted awhile ago. It is the same as yours!

Solved: HTTP Redirect when calling changeFiles JSON with P... - Esri Community

The redirect is expected. Set up a condition that is trigged on the failure of your POST to changeFiles. The POST is expected to fail because Power Automate classifies the 302 code as a failed state. Weird, but that is the way it is.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Thu, 29 Jul 2021 20:29:28 GMT

oh my, I see you had the same issue. Now that you say it, I think I have seen this thread out of millions of threads I visited. Wonder why this is going so complicated. Sorry I keep pinging you but you are the only one who has this actually working 🙂 Thanks so much Phil...appreciate it!

I wish ESRI would have a blog on this for Power Automate too...much needed.

Re: Extract Changes Error - Invalid Sync model type. syncLayers json object is required.

JulieK — Fri, 30 Jul 2021 14:40:27 GMT

Hey Phil,

Somehow I am unable to access the .json file. I have extracted the arcgisazure url, but I cannot download it or upload it to my sharepoint. It says no public access to the folder. What process did you follow to get the feature attributes? I'll go ahead create a new question for this 🙂 Grateful and appreciate your time Phil !!