Rust Loco Snippets
Comprehensive Visual Studio Code snippets for the Loco web framework for Rust. 100+ snippets covering everything from basic controllers and models to advanced workers, mailers, middleware, authentication, testing, and deployment.
All snippets use the prefix loco- for quick access.
Usage
Type the prefix (e.g., loco-controller-crud) in a .rs file and select the snippet from IntelliSense suggestions. Tab stops are included for easy customization.
Configuration snippets work in .yaml files, Cargo snippets in .toml files, and deployment snippets in Dockerfile files.
App Setup & Configuration
| Prefix |
Description |
loco-import |
Import Loco prelude |
loco-import-full |
Import Loco prelude with common dependencies |
loco-hello-world |
Complete Hello World controller with route |
loco-app-hooks |
App struct with Hooks trait (app.rs) |
loco-app-hooks-full |
Full App hooks with workers, tasks, after_routes |
loco-main-rs |
Main entry point (main.rs) |
loco-mod-controllers |
Controllers module declaration |
loco-mod-models |
Models module declaration |
Controllers
| Prefix |
Description |
loco-controller-basic |
Basic controller with single GET endpoint |
loco-controller-get |
GET handler fetching single record by ID |
loco-controller-list |
GET handler listing all records |
loco-controller-create |
POST handler to create a record |
loco-controller-update |
PUT handler to update a record |
loco-controller-delete |
DELETE handler to remove a record |
loco-controller-crud |
Full CRUD controller with all endpoints |
loco-controller-health |
Health check endpoint with DB ping |
loco-controller-pagination-full |
Paginated list endpoint with metadata |
loco-controller-streaming |
Server-Sent Events (SSE) endpoint |
loco-controller-multipart |
Multipart form file upload handler |
loco-controller-versioned |
Versioned API controller (v1/v2) |
Routing
| Prefix |
Description |
loco-routes-basic |
Basic routes function |
loco-routes-resource |
RESTful resource routes |
loco-routes-nested |
Nested/versioned API routes |
loco-route-add |
Add a single route |
Models & Entities
| Prefix |
Description |
loco-model-entity |
SeaORM entity model definition |
loco-model-entity-with-relations |
Entity with belongs_to relation |
loco-model-impl |
Model implementation with custom finder |
loco-model-validation |
Model validation with validator crate |
loco-hooks-on-model |
Model lifecycle hooks (before/after save/delete) |
Migrations
| Prefix |
Description |
loco-migration-create-table |
Create a new table |
loco-migration-add-column |
Add a column to existing table |
loco-migration-create-index |
Create an index |
loco-migration-foreign-key |
Add a foreign key constraint |
loco-migration-seed-raw |
Migration with raw SQL seed data |
Request & Response
| Prefix |
Description |
loco-response-json |
Return JSON response |
loco-response-json-value |
Return JSON with inline value |
loco-response-empty |
Return empty response (204) |
loco-response-text |
Return plain text response |
loco-response-html |
Return HTML response |
loco-response-redirect |
Redirect to a URL |
loco-response-custom-status |
Response with custom status code |
| Prefix |
Description |
loco-params-json |
Extract JSON body |
loco-params-path |
Extract path parameter |
loco-params-query |
Extract query parameters |
loco-params-state |
Extract app context state |
loco-params-struct |
Request parameters struct |
loco-params-query-struct |
Query params struct for pagination |
loco-extractor-custom |
Custom extractor (FromRequestParts) |
loco-extractor-from-request |
Custom extractor with validation (FromRequest) |
Views
| Prefix |
Description |
loco-view-response |
View/response struct with From implementation |
loco-view-pagination |
Paginated response wrapper struct |
Middleware
| Prefix |
Description |
loco-middleware-layer |
Add middleware layer in after_routes |
loco-middleware-cors |
CORS middleware configuration |
loco-middleware-timeout |
Request timeout middleware |
loco-middleware-compression |
Response compression middleware |
loco-middleware-trace |
Request tracing with custom spans |
loco-middleware-rate-limit |
Rate limiting middleware |
loco-middleware-custom |
Custom middleware function |
loco-middleware-from-fn-state |
Custom middleware with app state |
loco-middleware-request-id |
Request ID propagation |
loco-middleware-sensitive-headers |
Mark headers as sensitive |
loco-middleware-catch-panic |
Catch panic middleware |
Authentication & Authorization
| Prefix |
Description |
loco-auth-jwt-middleware |
JWT-authenticated endpoint handler |
loco-auth-api-token |
API token authenticated handler |
loco-auth-login |
Login endpoint with JWT generation |
loco-auth-register |
User registration endpoint |
loco-auth-forgot-password |
Forgot password endpoint |
loco-auth-routes |
Authentication routes |
Database Queries
| Prefix |
Description |
loco-db-find-all |
Find all records |
loco-db-find-by-id |
Find a record by ID |
loco-db-find-by-column |
Find by column value |
loco-db-insert |
Insert a new record |
loco-db-update |
Update an existing record |
loco-db-delete |
Delete a record by ID |
loco-db-paginate |
Paginated query |
loco-db-filter-multiple |
Query with multiple optional filters |
loco-db-transaction |
Database transaction with commit |
loco-db-raw-query |
Raw SQL query with SeaORM |
loco-db-join |
Query with related entities (JOIN) |
loco-db-select-columns |
Select specific columns only |
Tasks
| Prefix |
Description |
loco-task-basic |
Basic task definition |
loco-task-seed |
Database seeding task |
loco-task-cleanup |
Cleanup task for old records |
Workers (Background Jobs)
| Prefix |
Description |
loco-worker-basic |
Background worker definition |
loco-worker-enqueue |
Enqueue a background job |
loco-worker-email |
Email sending worker |
loco-worker-retry |
Worker with retry logic |
Mailers
| Prefix |
Description |
loco-mailer-basic |
Basic mailer function |
loco-mailer-with-worker |
Mailer with background worker |
loco-mailer-template-html |
Mailer HTML template |
Scheduler
| Prefix |
Description |
loco-scheduler-basic |
Basic scheduler job (task) |
loco-scheduler-shell |
Scheduler job (shell command) |
Storage
| Prefix |
Description |
loco-storage-upload |
File upload handler |
loco-storage-download |
File download handler |
loco-storage-init |
Initialize storage driver |
Cache
| Prefix |
Description |
loco-cache-get-set |
Cache get/set pattern |
loco-cache-invalidate |
Cache invalidation |
WebSocket / Channels
| Prefix |
Description |
loco-channels-websocket |
WebSocket echo handler |
loco-channels-broadcast |
WebSocket with broadcast |
Initializers
| Prefix |
Description |
loco-initializer |
Custom initializer hook |
Error Handling
| Prefix |
Description |
loco-error-custom |
Custom application error type |
loco-error-handler-global |
Global error handler with custom format |
Testing
| Prefix |
Description |
loco-test-controller |
Controller integration test |
loco-test-controller-auth |
Authenticated controller test |
loco-test-post-json |
Test POST with JSON body |
loco-test-model |
Model unit test |
loco-test-worker |
Worker unit test |
loco-test-task |
Task unit test |
loco-test-snapshot |
Snapshot test with insta |
loco-test-seed-fixture |
Test fixture/seed helper |
Architecture Patterns
| Prefix |
Description |
loco-service-layer |
Service layer pattern |
loco-repository-pattern |
Repository trait pattern |
loco-shared-state |
Shared global state with RwLock |
loco-event-bus |
In-process event bus |
loco-rate-limiter-per-key |
Per-key sliding window rate limiter |
loco-soft-delete |
Soft delete pattern |
Advanced
| Prefix |
Description |
loco-tracing-structured |
Structured tracing instrumentation |
loco-template-tera |
HTML template rendering with Tera |
loco-openapi-annotations |
OpenAPI annotations with utoipa |
loco-openapi-doc |
OpenAPI document definition |
loco-http-client |
HTTP client for external APIs |
loco-graceful-shutdown |
Graceful shutdown signal handler |
Configuration (YAML)
| Prefix |
Description |
loco-config-development |
Development configuration file |
loco-config-production |
Production configuration file |
loco-config-test |
Test environment configuration |
loco-config-mailer |
Mailer SMTP configuration |
loco-config-workers |
Workers/queue configuration |
loco-config-storage |
Storage configuration |
loco-config-scheduler |
Scheduler configuration |
loco-config-cache |
Cache configuration |
loco-config-static-assets |
Static assets serving |
loco-config-logger |
Logger configuration |
Cargo.toml
| Prefix |
Description |
loco-cargo-deps |
Core Loco dependencies |
loco-cargo-deps-full |
Full dependencies including testing |
loco-cargo-workspace |
Workspace Cargo.toml |
loco-cargo-migration |
Migration crate Cargo.toml |
loco-cargo-profile-release |
Optimized release profile |
DevOps & Deployment
| Prefix |
Description |
loco-dockerfile |
Multi-stage Dockerfile |
loco-dockerfile-with-migrations |
Dockerfile with auto migrations |
loco-docker-compose |
Docker Compose (app + Postgres + Redis) |
loco-docker-compose-dev |
Docker Compose for development |
loco-github-actions-ci |
GitHub Actions CI workflow |
loco-makefile |
Makefile for common tasks |
Pre-requisites
cargo install loco
cargo install sea-orm-cli # Only when DB is needed
Create a new Loco project:
loco new
# Select your app type: SaaS, REST API, or Lightweight
Snippet Levels
Beginner — App setup, basic controllers, routes, models, migrations, responses, parameters
Intermediate — Middleware, authentication, database queries, tasks, views, validation
Advanced — Workers, mailers, custom extractors, storage, cache, WebSocket, testing, deployment, architecture patterns, OpenAPI
Contributing
Feel free to suggest more snippets or contribute via GitHub.
