[Solved] What is wrong with this Flask SQLAlchemy query?users = User.query.filter(User.name == 'Alice').all().limit(3) | Flask

Flask - Performance Optimization

What is wrong with this Flask SQLAlchemy query?

users = User.query.filter(User.name == 'Alice').all().limit(3)

ACalling limit() after all() causes an error

BFilter condition syntax is incorrect

CMissing parentheses in filter method

DNo error, query is correct

Step-by-Step Solution

Solution:

Step 1: Understand method chaining order
In Flask SQLAlchemy, limit() must be called before all() because all() executes the query and returns a list.
Step 2: Identify error cause
Calling limit() on a list (result of all()) causes an AttributeError.
Final Answer:
Calling limit() after all() causes an error -> Option A
Quick Check:
limit() after all() = error [OK]

Quick Trick: Call limit() before all() to avoid errors [OK]

Common Mistakes:

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