Spark join throws 'function' object has no attribute '_get_object_id' error. How could I fix it?

I am making a query in Spark in Databricks, and I have a problema when I am trying to make a join between two dataframes. The two dataframes that I have are the next ones:

• “names_df” which has 2 columns: “ID”, “title” that refer to the id and the title of films.

  +-------+-----------------------------+
  |ID     |title                        |
  +-------+-----------------------------+
  |1      |Toy Story                    |
  |2      |Jumanji                      |
  |3      |Grumpier Old Men             |
  +-------+-----------------------------+
  

• “info” which has 3 columns: “movieId”, “count”, “average” that refer to the id of the film, the number of ranks that it has, and the average of those ratings.

  +-------+-----+------------------+
  |movieId|count|average           |
  +-------+-----+------------------+
  |1831   |7463 |2.5785207021305103|
  |431    |8946 |3.695059244355019 |
  |631    |2193 |2.7273141814865483|
  +-------+-----+------------------+
  

This “info” dataframe was created this way:

info =  ratings_df.groupBy('movieId').agg(F.count(ratings_df.rating).alias("count"), F.avg(ratings_df.rating).alias("average"))

Where “ratings_df” is another dataframe that contains 3 columns: “userId”, “movieId” and “rating”, that refer to the id of the user that voted, the id of the film that the user voted to, and the rating for that film:

+-------+-------+-------------+
|userId |movieId|rating       |
+-------+-------+-------------+
|1      |2      |3.5          |
|1      |29     |3.5          |
|1      |32     |3.5          |
+-------+-------+-------------+

I am trying to make a join between these two dataframes to get another one with those columns: “movieId”, “title”, “count”, “average”:

+-------+-----------------------------+-----+-------+
|average|title                        |count|movieId|
+-------+-----------------------------+-----+-------+
|5.0    |Ella Lola, a la Trilby (1898)|1    |94431  |
|5.0    |Serving Life (2011)          |1    |129034 |
|5.0    |Diplomatic Immunity (2009? ) |1    |107434 |
+-------+-----------------------------+-----+-------+

So the operation I did was the next one:

movie_names_df = info.join(movies_df, info.movieId == movies_df.ID, "inner").select(movies_df.title, info.average, info.movieId, info.count).show()

The problem is that I get the next error message:

AttributeError: 'function' object has no attribute '_get_object_id'

And I know that this error occurs because it consider that info.count is a function, and not an attribute, as I defined previously.

So, how could I make that join correctly to get what I want?

Thank you so much!