[Solved] You run this command in Tinker:App\Models\User::find('abc');But it returns null. What is the likely cause? | Laravel

Laravel - Database Basics and Migrations

You run this command in Tinker:
App\Models\User::find('abc');
But it returns null. What is the likely cause?

AThe User model is missing from the project

BTinker cannot run find() method

Cfind() method requires an array, not a string

D'abc' is not a valid primary key value (should be numeric or matching key type)

Step-by-Step Solution

Solution:

Step 1: Understand find() method requirements
find() looks up a record by primary key, which is usually numeric or UUID.
Step 2: Analyze the input 'abc'
If 'abc' does not match any primary key, find() returns null.
Final Answer:
'abc' is not a valid primary key value (should be numeric or matching key type) -> Option D
Quick Check:
Invalid primary key input causes find() to return null [OK]

Quick Trick: find() needs valid primary key value [OK]

Common Mistakes:

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