SQLSTATE column not found

Error Message

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'posts.nonexistent' in 'field list'

Cause

The query references a column that doesn't exist in the table. The migration adding the column hasn't been run, or the column name is misspelled.

Solution

Create a new migration to add the missing column. Run php artisan migrate. Verify the column name in the model and query.

Code Example

Fix

// Create migration to add the missing column
Schema::table('posts', function (Blueprint $table) {
    $table->string('subtitle')->nullable()->after('title');
});

// Run migration
php artisan migrate

Debugging Steps

Check the database schema for the column
Run php artisan migrate:status
Verify column names in queries and models
Check for recent migrations that may have dropped the column

Prevention

Always create migrations for schema changes. Never manually alter production databases. Use php artisan make:migration to scaffold changes.