API Overview - Inventario

Introduction

The Inventario API is a RESTful web service built with Django that provides inventory management capabilities including products, sales, purchases, clients, and suppliers management.

Base URL

All API requests should be made to your Inventario installation’s base URL:

http://your-domain.com/

For local development:

http://localhost:8000/

API Architecture

The Inventario API follows Django’s URL routing structure with the following main endpoints:

/productos/ - Product management
/ventas/ - Sales and transactions
/compras/ - Purchase orders
/clientes/ - Client management
/proveedores/ - Supplier management
/usuarios/ - User management
/reportes/ - Reports and analytics
/configuracion/ - System configuration

Request Format

The API accepts both form-encoded data and JSON payloads depending on the endpoint:

Form-Encoded (Standard Django Views)

curl -X POST http://localhost:8000/productos/nuevo/ \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "nombre=Laptop&precio=1500.00&stock=10"

JSON (AJAX/API Endpoints)

curl -X POST http://localhost:8000/ventas/api/buscar-producto/ \
  -H "Content-Type: application/json" \
  -d '{"codigo_barras": "1234567890"}'

Response Format

HTML Responses

Standard Django views return rendered HTML templates with server-side rendering.

JSON Responses

API endpoints (typically under /api/ paths) return JSON responses:

{
  "success": true,
  "data": {
    "id": 1,
    "nombre": "Laptop",
    "precio": "1500.00"
  }
}

Error Response

{
  "success": false,
  "error": "Product not found"
}

HTTP Status Codes

The API uses standard HTTP status codes:

Request successful

Created

Resource created successfully

Found

Redirect (common in Django form submissions)

Bad Request

Invalid request parameters or validation error

Unauthorized

Authentication required

Forbidden

Insufficient permissions (e.g., vendedor accessing admin-only endpoint)

Not Found

Resource not found

Internal Server Error

Server error

Common Error Codes

Error Code	Description
`CSRF_TOKEN_MISSING`	CSRF token not provided
`INVALID_CREDENTIALS`	Authentication failed
`PERMISSION_DENIED`	User lacks required role/permissions
`VALIDATION_ERROR`	Form validation failed
`RESOURCE_NOT_FOUND`	Requested resource doesn’t exist
`PROTECTED_ERROR`	Cannot delete resource with dependencies

Pagination

List endpoints support pagination with query parameters:

integer

default:"1"

Page number to retrieve

Example:

curl http://localhost:8000/productos/?page=2

Pagination response includes:

has_next - Boolean indicating more pages
has_previous - Boolean indicating previous pages
number - Current page number
num_pages - Total number of pages

Filtering and Sorting

Many list endpoints support filtering and sorting:

Filtering

# Filter products by category
curl http://localhost:8000/productos/?categoria=Electronics

Sorting

# Sort products by name
curl http://localhost:8000/productos/?orden=nombre

# Sort by price (descending)
curl http://localhost:8000/productos/?orden=-precio

Date/Time Format

All timestamps use ISO 8601 format in America/Bogota timezone:

2024-03-15T14:30:00-05:00

Decimal Fields

Monetary values use Decimal type with 2 decimal places:

{
  "precio": "1500.00",
  "total": "3250.50"
}

User Roles and Permissions

Inventario implements role-based access control:

Admin Role

Full CRUD operations on all resources
Can create/manage vendedor users
Access to all reports and analytics

Vendedor Role

Read-only access to products
Can create and view sales
Limited access to reports
Cannot modify products, purchases, or system settings

See Authentication for details on role enforcement.

​Introduction

​Base URL

​API Architecture

​Request Format

​Form-Encoded (Standard Django Views)

​JSON (AJAX/API Endpoints)

​Response Format

​HTML Responses

​JSON Responses

​Error Response

​HTTP Status Codes

​Common Error Codes

​Pagination

​Filtering and Sorting

​Filtering

​Sorting

​Date/Time Format

​Decimal Fields

​User Roles and Permissions

​Admin Role

​Vendedor Role