topic Re: Check if a layer exists in ArcGIS Online in ArcGIS API for Python Questions

Check if a layer exists in ArcGIS Online

DryCreekEng — Tue, 23 Mar 2021 19:04:27 GMT

I am uploading about 40 zip files to AGOL as shapefiles being published as feature layers using a Jupyter Notebook. Just about all of the zip files are shapefiles but I have discovered a few are actually geodatabases zipped up. Each time the program finds a gdb, it stops and I get an error. I have to rename the folder, go into AGOL and delete ALL the layers before it that were just created, then rerun the program until it hits another gdb. Then I repeat those steps. I tried using " if arcpy.Exists" but that only checks for existence in the folder on my drive, not on AGOL. I would ideally like it to print the files that dont work but keep on chugging through.

list = [] for p in arcpy.ListFiles("*.zip"): list.append(p) print (p) for n in list: if "gdb" not in n: if "App" not in n: print (n) data_file_location = workspace + "\\" + n layer = { 'title': ('%s') % n[:-4], 'tags': 'data collection', 'type': 'Shapefile'} add_layer = gis.content.add(layer, data = data_file_location) pub = add_layer.publish()

Re: Check if a layer exists in ArcGIS Online

MehdiPira1 — Wed, 24 Mar 2021 01:51:41 GMT

Hi @DryCreekEng ,

For the file geodatabase you need to specify the type in the item properties.

This is a quick script I put together:

if gdb: item_props = {'type':'File Geodatabase'} elif shapefile: item_props = {'type':'Shapefile'} else: ..... add_item = gis.content.add(item_properties= item_props, data = path to data file)

I hope that helps.

Mehdi

Re: Check if a layer exists in ArcGIS Online

simoxu — Wed, 24 Mar 2021 03:56:03 GMT

You can use gis.content.search to check if a service is existing in AGOL or Portal.

have you seen this user guide:

https://developers.arcgis.com/python/guide/working-with-feature-layers-and-features/#Searching-the-GIS-for-feature-layers

Re: Check if a layer exists in ArcGIS Online

DryCreekEng — Thu, 25 Mar 2021 16:44:35 GMT

thank you Mehdi, I had tried to do this but wasn't successful. Its good to know I can set the data type in the code like that.

Re: Check if a layer exists in ArcGIS Online

MehdiPira1 — Fri, 26 Mar 2021 00:38:21 GMT

@DryCreekEng ,

Not a problem. What is the error you're getting?

You'd better clean up the AGOL from the published zipped files first.

Re: Check if a layer exists in ArcGIS Online

DryCreekEng — Mon, 29 Mar 2021 17:11:48 GMT

I get an error saying that the layer already exists in AGOL, and the code stops running. My problem is that I run code to upload a bunch of files, and if an error occurs, the code stops. I fix the problem, but before I can run the code again, I have to delete the files in AGOL that were uploaded prior to the error. Otherwise, I get the error saying the files already exist in AGOL. Its a pain, and I would like to use "OverwriteOutput = True" or something along the lines of "ifExists" but I havent been able to get anything to work.

Re: Check if a layer exists in ArcGIS Online

DryCreekEng — Tue, 30 Mar 2021 18:14:26 GMT

Thank you @simoxu for the article. The article shows how you can check for a feature by specifying the feature's title or ID. Do you know how I could use this to recursively search for a feature as part of an if statement, and if True, then skip over the layer or replace it?