Agent Skills: Laravel Migrations

Laravel Migrations

Agent Workflow (MANDATORY)

Before ANY implementation, use TeamCreate to spawn 3 agents:

1. fuse-ai-pilot:explore-codebase - Check existing migrations
2. fuse-ai-pilot:research-expert - Verify Laravel 13 patterns via Context7
3. mcp__context7__query-docs - Check specific Schema Builder features

After implementation, run fuse-ai-pilot:sniper for validation.

Overview

| Feature | Description | |---------|-------------| | Schema Builder | Create, modify, drop tables | | Columns | 50+ column types with modifiers | | Indexes | Primary, unique, fulltext, spatial | | Foreign Keys | Constraints with cascade options | | Seeders | Populate tables with data |

Critical Rules

1. Always define down() - Reversible migrations
2. Use foreignId()->constrained() - Not raw unsignedBigInteger
3. Add indexes on foreign keys - Performance critical
4. Test rollback before deploy - Validate down() works
5. Never modify deployed migrations - Create new ones

Decision Guide

Migration Type

Need schema change?
├── New table → make:migration create_X_table
├── Add column → make:migration add_X_to_Y_table
├── Modify column → make:migration modify_X_in_Y_table
├── Add index → make:migration add_index_to_Y_table
└── Seed data → make:seeder XSeeder

Column Type Selection

| Use Case | Type | Example | |----------|------|---------| | Primary Key | id() | Auto-increment BIGINT | | Foreign Key | foreignId()->constrained() | References parent | | UUID Primary | uuid()->primary() | UUIDs | | Boolean | boolean() | is_active | | Enum | enum('status', [...]) | order_status | | JSON | json() | preferences | | Money | decimal('price', 10, 2) | 99999999.99 | | Timestamps | timestamps() | created_at, updated_at | | Soft Delete | softDeletes() | deleted_at |

Foreign Key Cascade

| Scenario | onDelete | Use Case | |----------|----------|----------| | Strict integrity | restrictOnDelete() | Financial records | | Auto-cleanup | cascadeOnDelete() | Post → Comments | | Preserve with null | nullOnDelete() | Optional relations | | No action | noActionOnDelete() | Audit logs |

Reference Guide

Core Concepts

| Topic | Reference | When to Consult | |-------|-----------|-----------------| | Schema | schema.md | Table operations | | Columns | columns.md | Column types | | Indexes | indexes.md | Performance indexes | | Foreign Keys | foreign-keys.md | Constraints | | Commands | commands.md | Artisan commands | | Seeding | seeding.md | Populate data |

Advanced Topics

| Topic | Reference | When to Consult | |-------|-----------|-----------------| | Testing | testing.md | Test migrations | | Production | production.md | Deploy safely | | Troubleshooting | troubleshooting.md | Fix errors |

Templates

| Template | When to Use | |----------|-------------| | CreateTableMigration.php.md | New table | | ModifyTableMigration.php.md | Alter table | | PivotTableMigration.php.md | Many-to-many | | Seeder.php.md | Seed patterns | | MigrationTest.php.md | Test migrations |

Quick Reference

Create Table

Schema::create('posts', function (Blueprint $table) {
    $table->id();
    $table->foreignId('user_id')->constrained()->cascadeOnDelete();
    $table->string('title');
    $table->text('content');
    $table->enum('status', ['draft', 'published'])->default('draft');
    $table->timestamps();
    $table->softDeletes();

    $table->index(['user_id', 'status']);
});

Modify Table

Schema::table('posts', function (Blueprint $table) {
    $table->string('slug')->after('title')->unique();
    $table->boolean('featured')->default(false);
});

Commands

php artisan make:migration create_posts_table
php artisan migrate
php artisan migrate:rollback --step=1
php artisan migrate:fresh --seed

Best Practices

DO

• Use foreignId()->constrained() for foreign keys
• Add composite indexes for common queries
• Test down() method before deploying
• Use --pretend to preview SQL

DON'T

• Modify already-deployed migrations
• Forget down() method
• Use raw SQL without Schema Builder
• Skip indexes on foreign keys

Laravel 13 Notes

Schema::ensureVectorExtensionExists() (pgvector)

Laravel 13 expose une helper pour activer l'extension pgvector sur PostgreSQL depuis une migration. Utile pour embeddings et recherche sémantique.

use Illuminate\Support\Facades\Schema;

return new class extends Migration {
    public function up(): void
    {
        Schema::ensureVectorExtensionExists();

        Schema::create('documents', function (Blueprint $table) {
            $table->id();
            $table->text('content');
            $table->vector('embedding', dimensions: 1536); // OpenAI ada-002
            $table->timestamps();

            $table->index('embedding', 'documents_embedding_idx', 'hnsw');
        });
    }
};

Voir [[laravel-vector-search]] pour les requêtes whereVectorSimilarTo().