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Identify the error in this Flask SQLAlchemy query:

medium📝 Debug Q6 of 15
Flask - Performance Optimization
Identify the error in this Flask SQLAlchemy query:
users = User.query.filter(User.name == 'Alice').limit().all()
Afilter() cannot be used with limit()
Blimit() requires an integer argument
Call() should come before limit()
DUser.name should be User.names
Step-by-Step Solution
Solution:
  1. Step 1: Check limit() usage

    The limit() method requires a number to specify how many records to return.
  2. Step 2: Validate other parts

    filter() and all() usage is correct; User.name is valid assuming model field.
  3. Final Answer:

    limit() requires an integer argument -> Option B
  4. Quick Check:

    limit() needs a number = B [OK]
Quick Trick: Always pass a number to limit() [OK]
Common Mistakes:
MISTAKES
  • Calling limit() without argument
  • Misordering all() and limit()
  • Incorrect attribute name assumptions

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