Upserting a MongoDB collection doc with $max - max

Question

TL;DR Only last $max statement seems to get implemented
Hi there I am trying to add or update data based on if the new incoming value is greater than the stored value using pymongo
{
'site': 'xyz.com',
'site_data':
{'particular_aspect_about_site':{'score_1': 2, 'score_2': 2, 'score_3': 1}},
`enter code here`{'a_different_aspect_about_site': {'score_a': 3, 'score_b': 1, 'score_c': 4}},
}
what I am trying is something like
def upsert_site_data():
site_to_upsert = None
data_to_upsert = None
json_object = request.get_json()
if "site" in json_object:
site_to_upsert = json_object["site"]
data_to_upsert = { "site" : site_to_upsert}
###### check if data was collected
if "site_data" in json_object:
data_to_upsert.update(json_object["site_data"])
collection_name = mongo.db.SiteData # establish mongo db instance to work with
try:
result = collection_name.update_one({"site" : site_to_upsert,
},
{
"$max" : { "particular_aspect_about_site.score_2" : data_to_upsert["particular_aspect_about_site"]["score_2"]} ,
"$max" : { "particular_aspect_about_site.score_3" : data_to_upsert["particular_aspect_about_site"]["score_3"]},
"$max" : { "a_different_aspect_about_site.score_b" : data_to_upsert["a_different_aspect_about_site"]["score_b"]},
}
,
upsert = True)
if result.raw_result["updatedExisting"] != True:
return jsonify({"status": "ok"}) , 200
if result.raw_result["updatedExisting"] == True:
return jsonify({"error": "Site data was not updated, thanks though :D "}), 200
except Exception as e:
return jsonify({"error": e}) , 400
else:
return jsonify({"error": "A site must be refenced"}) , 400
The issue is with the $max statements in the update section of the update function.
It only ever implements the final max.
I have also tried other methods to less success such as
{
"$max" : [
{ "particular_aspect_about_site.score_2" : data_to_upsert["particular_aspect_about_site"]["score_2"]},
{ "particular_aspect_about_site.score_3" : data_to_upsert["particular_aspect_about_site"]["score_3"]},
{ "a_different_aspect_about_site.score_b" : data_to_upsert["a_different_aspect_about_site"]["score_b"]}
]
}

Answer 1

So it was a mistake by me, I did
{ "$max" : { "particular_aspect_about_site.score_2" : data_to_upsert["particular_aspect_about_site"]["score_2"]} ,
"$max" : { "particular_aspect_about_site.score_3" : data_to_upsert["particular_aspect_about_site"]["score_3"]},
"$max" : { "a_different_aspect_about_site.score_b" : data_to_upsert["a_different_aspect_about_site"]["score_b"]},
}
But I should have used this template
{ $max: { field1: value1, field2: value2 ... } }
from [geeks4geeks][1]
now it looks like
{ "$max" : {
"particular_aspect_about_site.score_2" : data_to_upsert["particular_aspect_about_site"]["score_2"] ,
"particular_aspect_about_site.score_3" : data_to_upsert["particular_aspect_about_site"]["score_3"],
"a_different_aspect_about_site.score_b" : data_to_upsert["a_different_aspect_about_site"]["score_b"]},
}
Does what I want now. I'm sure there is a better way to do this and when i find it I will post, does what I need now
[1]: https://www.geeksforgeeks.org/mongodb-maximum-operator-max/