Pymongo $在查询中不起作用

Question

Seeing some strange behavior in Pymongo $in query. Looking for records that meet the following query:

speciesCollection.find({"SPCOMNAME":{"$in":['paddlefish','lake sturgeon']}})

The query returns no records.

If I change it to find_one the it works returning the last value for Lake Sturgeon. The field is a text filed with one vaule. So I am looking for records that match paddlefish or Lake Sturgeon.

It works fine in Mongo Shell like this:

speciesCollection.find({SPCOMNAME:{$in: ['paddlefish','lake strugeon']}},{_id:0})

Here is the result from shell

{ "SPECIES_ID" : 1, "SPECIES_AB" : "LKS", "SPCOMNAME" : "lake sturgeon", "SP_SCINAME" : "Acipenser fulvescens
{ "SPECIES_ID" : 101, "SPECIES_AB" : "PAH", "SPCOMNAME" : "paddlefish", "SP_SCINAME" : "Polyodon spathula" }

Am I missing something here?

Answer 1

I think you have a typo or some other error in your program as I just did a test with your sample data and query and it works - see the GIF

Below is my test code which connects to the database called so and the collection speciesCollection , maybe you find the error in yours with it

import pymongo

client = pymongo.MongoClient('dockerhostlinux1', 30000)
db = client.so
coll = db.speciesCollection

result = coll.find({"SPCOMNAME":{"$in":['paddlefish','lake sturgeon']}})
for doc in result:
    print(doc)