# OpenAPI

TableCraft can **automatically generate OpenAPI 3.0 specifications** from your table configurations.

## How It Works

{% stepper %}
{% step %}

#### Generate Spec from Config

```typescript
import { generateOpenApiSpec } from '@tablecraft/engine';
import { orders } from './tablecraft.config';

const spec = generateOpenApiSpec(orders.toConfig());

console.log(JSON.stringify(spec, null, 2));
```

{% endstep %}

{% step %}

#### Serve as JSON Endpoint

Create an endpoint that serves the spec.

**Next.js Example:**

```typescript
// app/api/docs/[table]/route.ts
import { generateOpenApiSpec } from '@tablecraft/engine';
import * as configs from '@/tablecraft.config';

export async function GET(
  request: Request,
  { params }: { params: { table: string } }
) {
  const config = configs[params.table];
  
  if (!config) {
    return Response.json({ error: 'Table not found' }, { status: 404 });
  }

  const spec = generateOpenApiSpec(config.toConfig());
  return Response.json(spec);
}
```

**Access:** `GET /api/docs/orders`
{% endstep %}

{% step %}

#### Combine Multiple Tables

Generate a unified spec for all your tables.

```typescript
function generateFullSpec() {
  const baseSpec = {
    openapi: '3.0.3',
    info: { title: 'My API', version: '1.0.0' },
    paths: {},
  };

  // Merge all table specs
  for (const [name, config] of Object.entries(configs)) {
    const tableSpec = generateOpenApiSpec(config.toConfig());
    Object.assign(baseSpec.paths, tableSpec.paths);
  }

  return baseSpec;
}
```

{% endstep %}
{% endstepper %}

## Generated Spec Structure

### Example Input

```typescript
const orders = defineTable(ordersTable)
  .search('status', 'customerName')
  .options('status', [
    { value: 'pending', label: 'Pending' },
    { value: 'completed', label: 'Completed' },
  ])
  .aggregate('totalRevenue', 'sum', 'total')
  .exportable('csv', 'json')
  .access({ roles: ['admin', 'sales'] });
```

### Generated Output (Snippet)

```json
{
  "openapi": "3.0.3",
  "info": {
    "title": "orders API",
    "version": "1.0.0"
  },
  "paths": {
    "/api/orders": {
      "get": {
        "summary": "List orders",
        "operationId": "listOrders",
        "parameters": [
          {
            "name": "page",
            "in": "query",
            "required": false,
            "schema": { "type": "integer", "default": 1 }
          },
          {
            "name": "pageSize",
            "in": "query",
            "required": false,
            "schema": { "type": "integer", "default": 25, "maximum": 100 }
          },
          {
            "name": "sort",
            "in": "query",
            "required": false,
            "schema": { "type": "string" },
            "description": "Comma-separated fields. Prefix with - for desc."
          },
          {
            "name": "search",
            "in": "query",
            "required": false,
            "schema": { "type": "string" },
            "description": "Search across: status, customerName"
          },
          {
            "name": "export",
            "in": "query",
            "required": false,
            "schema": { "type": "string", "enum": ["csv", "json"] }
          },
          {
            "name": "filter[status]",
            "in": "query",
            "required": false,
            "schema": { "type": "string" }
          }
        ],
        "responses": {
          "200": {
            "description": "Success",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "data": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "id": { "type": "string", "description": "Order ID" },
                          "total": { "type": "number" },
                          "status": { "type": "string" },
                          "customerName": { "type": "string" }
                        }
                      }
                    },
                    "meta": {
                      "type": "object",
                      "properties": {
                        "total": { "type": "integer" },
                        "page": { "type": "integer" },
                        "pageSize": { "type": "integer" },
                        "totalPages": { "type": "integer" }
                      }
                    },
                    "aggregations": {
                      "type": "object",
                      "properties": {
                        "totalRevenue": { "type": "number" }
                      }
                    }
                  }
                }
              }
            }
          }
        },
        "security": [
          { "bearerAuth": [] }
        ]
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "JWT"
      }
    }
  }
}
```

## Use Cases

{% tabs %}
{% tab title="Swagger UI" %}
Serve the spec and mount Swagger UI:

```tsx
// app/api-docs/page.tsx
'use client';
import SwaggerUI from 'swagger-ui-react';
import 'swagger-ui-react/swagger-ui.css';

export default function ApiDocs() {
  return <SwaggerUI url="/api/docs" />;
}
```

{% endtab %}

{% tab title="Client Gen" %}
Use `openapi-generator` to create a typed client:

```bash
openapi-generator-cli generate \
  -i http://localhost:3000/api/docs \
  -g typescript-fetch \
  -o ./src/api-client
```

{% endtab %}

{% tab title="Postman" %}

1. Open Postman
2. Click **Import** → **Link**
3. Paste: `http://localhost:3000/api/docs`
4. All endpoints auto-populate with parameters
   {% endtab %}
   {% endtabs %}

## What Gets Included

### ✅ Automatically Generated

* **Paths**: One per table (`/api/{tableName}`)
* **Query Parameters**: Pagination, Sorting, Filtering, Search, Export
* **Response Schema**: `data[]`, `meta`, `aggregations`
* **Security**: Bearer auth (if `access` is configured)

### ❌ Not Included

* **POST/PUT/DELETE**: Only GET endpoints (TableCraft is read-only)
* **Nested includes**: Doesn't document nested relations
* **Raw SQL columns**: Included but type may be generic


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://jacksonkasi.gitbook.io/tablecraft/api-reference/openapi.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.