[FIXED] MongoDB update: I can't update my documents in MongoDB with flask API

Issue

I want to update the month of document in mongoDB. for example changing the "month": "June" to "month": "May" in the document that has "truck_id": "A01"

This are my documents in MongoDB:

{
"0": {
    "available": "no",
    "end_date": "10",
    "month": "June",
    "start_date": "15",
    "truck_id": "A01"
},
"1": {
    "available": "yes",
    "end_date": null,
    "month": "June",
    "start_date": null,
    "truck_id": "A02"
}

}

And this is the code in my API:

@app.route('/update', methods=["PUT"])
    def updateElement():
        object_id = request.get_json()
        object_update = request.get_json()
        query = SampleTable.update_one(object_id, object_update)
        return jsonify(query)

When I tried to test my API with postman I write this in postmans raw body tester :

{
   "0":{  
      "truck_id":"A01"
   },
      "$set":{
         "month":"May"
      }
}

But when I tried this get the error:

Traceback (most recent call last):
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 2091, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 2076, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 2073, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 1518, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 1516, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\flask\app.py", line 1502, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "D:\Dev\api_test\appi\app.py", line 29, in updateElement
    query = SampleTable.update_one(object_id, object_update)
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\pymongo\collection.py", line 1023, in update_one
    common.validate_ok_for_update(update)
  File "C:\Users\umut8\AppData\Local\Programs\Python\Python310\Lib\site-packages\pymongo\common.py", line 567, in validate_ok_for_update
    raise ValueError('update only works with $ operators')
ValueError: update only works with $ operators

I know probably many things I do in here is wrong and I probably ask my question in a bad way but I don't know how to solve this.

Solution

Use replace_one() instead of update_one(). The 3rd parameter of replace_one() is upsert.

SampleTable.replace_one(object_id, object_update, True)

The exception was raised because you didn't specify any update operator e.g. $set.

Answered By - Daniel T