CODEWITHSUNDEEP
mongodbpymongopymongo-3.x
Hydroxl
Hydroxl

Reputation: 69

pymongo - TypeError: document must be an instance of dict, bson.son.SON, or other type that inherits from collections.MutableMapping

I'm writing data to MongoDB using pymongo.

I receive this error when performing the write operation.

TypeError: document must be an instance of dict, bson.son.SON, or other type  that inherits from collections.MutableMapping

If I print the data, and copy it with an insert_one() call, the information is written with the shell. I've tried converting the variable to a str, but I am not sure how it is formatted incorrectly, as if I copy the print line and perform the operation, it is added. This leads to me to suspect that there was not a problem with the format of the JSON object, but it's encoding or some variant thereof, or small syntax of the returned JSON object.

post_id = post_db.insert_one(chunk).inserted_id

Upvotes: 2

Views: 8413

Answers (2)

Bedi Egilmez
Bedi Egilmez

Reputation: 1542

I had the same error since I was passing a tuple to the insert_one() function. Double check the datatype you are passing into this function, as error explicitly says there are some datatypes are accepted to pass into this.

type(chunk) will be helpful for you.

Upvotes: 4

otayeby
otayeby

Reputation: 302

I had the same TypeError, when I used .insert_one() to insert many objects at the same time. Use bulk insert (.insert_many()), as recommended by the tutorial at: http://api.mongodb.org/python/current/tutorial.html#bulk-inserts.

Upvotes: -1

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