Random Document Retrieval from MongoDB Collection

This function is used to query a random document from a MongoDB collection. It first gets a cursor to the collection using the find method and then converts it to a list. If the document list is not empty, it selects a random document from the list using the random module and returns it.

Technology Stack : MongoDB, pymongo, random

Code Type : The type of code

Code Difficulty : Intermediate

                
                    
def random_query(collection, filter=None):
    """
    Query a MongoDB collection and return a random document based on the filter provided.
    """
    # Use the find method to get a cursor to the collection
    cursor = collection.find(filter)
    
    # Convert the cursor to a list
    documents = list(cursor)
    
    # Check if there are any documents in the collection
    if not documents:
        return None
    
    # Use the random module to select a random document
    import random
    import pymongo
    random_document = random.choice(documents)
    
    # Return the random document
    return random_document

# JSON explanation of the code