problem with search_challenges (receiving AttributeError)

Question

I keep receiving the error: AttributeError: 'NoneType' object has no attribute 'count'...  I've researched the error message to no avail. I've also looked at the documentation for the select() and where() methods, and feel like i'm calling them correctly. Thanks in advance for any help.
my code:
```python
from models import Challenge
def create_challenge(name, language, steps=1):
  Challenge.create(name=name, 
                   language=language,
                   steps=steps)
def search_challenges(name, language):
  challenges = Challenge.select()
  challenges.where(Challenge.name.contains(name) & Challenge.language == language)
```

Kenneth Love · Accepted Answer

You're not returning anything.

james white · Answer

Yes, the word 'return' is needed:
```Python
from models import Challenge
def create_challenge(name, language, steps=1):
    Challenge.create(name=name,
                     language=language,
                     steps=steps)
def search_challenges(name, language):
    return Challenge.select().where(
        Challenge.name.contains(name),
        Challenge.language==language
    )
```
Of course, this didn't help me, because by the time I found this thread I had already moved on to the next challenge:
http://teamtreehouse.com/library/using-databases-in-python/gettin-crudy-with-it/crud-delete-function
Challenge Task 1 of 1
Create a function named delete_challenge that takes a Challenge as an argument. Delete the specified Challenge. Your function shouldn't return anything.
Watch the video over and over again:
http://teamtreehouse.com/library/using-databases-in-python/gettin-crudy-with-it/delete-an-entry
..at about time index 2:43 I found (and re-typed since there is no way to OCR text from the videos):
```Python
def deleteentry(entry):
  entry.deleteinstance()
```
..which I eventually 'translated' to:
```Python
def deletechallenge(Challenge):
  Challenge.deleteinstance()
```
Note: I wish this challenge wasn't so new...couldn't find many threads on it..

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Clayton Perszyk

Clayton Perszyk

problem with search_challenges (receiving AttributeError)

2 Answers

Kenneth Love

Kenneth Love

Clayton Perszyk

Clayton Perszyk

james white

james white

Kenneth Love

Kenneth Love