Failed processing format-parameters with mysql.connector in Python

Question

I can\'t figure out what I\'m doing wrong with this insert statement. The error I\'m getting is:

 \"Failed processing format-parameters; %s\" % err)
mysql.co         


        

Answer 1

The first option is the correct way to put query parameters into the query - it is called a parameterized query. In this case, you are letting the database driver to escape the query parameters, safely insert them into the query and handle the Python-to-MySQL type conversions.

The error you are getting means that it could not convert one of the ID, Record, Latitude, Longitude or code parameter values to a valid MySQL database type. To be specific, see the variable types you have posted:

ID        <type 'unicode'> 
Record    <type 'unicode'>
Latitude  <class 'bs4.element.NavigableString'>
Longitude <class 'bs4.element.NavigableString'>
code      <type 'unicode'>

The problem is with Latitude and Longitude - they are BeautifulSoup's NavigableString class instances - the MySQL converter having difficulties in understanding how to convert a NavigableString object into a valid MySQL type. Convert them to strings explicitly beforehand:

update = """
    INSERT INTO 
        myDB.newtable 
        (ID,Record,Latitude,Longitude,code) 
    VALUES 
        (%s,%s,%s,%s,%s)
"""
cursor2.execute(update, (ID, Record, str(Latitude), str(Longitude), code))