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Which of the following is the correct syntax to use eager loading with SQLAlchemy in Flask?

easy📝 Syntax Q12 of 15
Flask - Performance Optimization
Which of the following is the correct syntax to use eager loading with SQLAlchemy in Flask?
Aquery.load_later(Model.related)
Bquery.lazyload(Model.related)
Cquery.eager(Model.related)
Dquery.options(joinedload(Model.related))
Step-by-Step Solution
Solution:
  1. Step 1: Identify eager loading syntax in SQLAlchemy

    SQLAlchemy uses joinedload() inside options() to eagerly load related data.
  2. Step 2: Check other options for correctness

    lazyload is for lazy loading, eager and load_later are not valid methods.
  3. Final Answer:

    query.options(joinedload(Model.related)) -> Option D
  4. Quick Check:

    Eager loading = options(joinedload()) [OK]
Quick Trick: Eager loading uses options(joinedload()) in SQLAlchemy [OK]
Common Mistakes:
MISTAKES
  • Using lazyload instead of joinedload for eager loading
  • Trying non-existent methods like eager()
  • Confusing method names for loading strategies

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