I want you to build me a custom object generator for schema.
Here a some examples
Create a few examples, show me all the options
Building a Custom Object Generator with AI SDK
I'll show you how to build a custom object generator using the AI SDK, which provides a standardized way to generate structured data from language models 1. This is perfect for creating interfaces similar to the ones in your screenshots.
Core Functionality: generateObject
The AI SDK provides the generateObject function which allows you to generate typed, structured objects based on a schema 1. This is ideal for:
- Information extraction
- Synthetic data generation
- Classification tasks
- Any scenario requiring structured output from an LLM
Output Strategies
The AI SDK supports several output strategies 2:
1. Object Output (Default)
import { generateObject } from 'ai';
import { openai } from '@ai-sdk/openai';
import { z } from 'zod';
const { object } = await generateObject({
model: openai('gpt-4o'),
schema: z.object({
recipe: z.object({
name: z.string(),
ingredients: z.array(z.string()),
steps: z.array(z.string()),
}),
}),
prompt: 'Generate a lasagna recipe.',
});
console.log(JSON.stringify(object, null, 2));2. Array Output
import { generateObject } from 'ai';
import { openai } from '@ai-sdk/openai';
import { z } from 'zod';
const { object } = await generateObject({
model: openai('gpt-4o'),
output: 'array',
schema: z.object({
name: z.string(),
class: z.string().describe('Character class, e.g. warrior, mage, or thief.'),
description: z.string(),
}),
prompt: 'Generate 3 hero descriptions for a fantasy role playing game.',
});3. Enum Output (For Classification)
import { generateObject } from 'ai';
import { openai } from '@ai-sdk/openai';
const { object } = await generateObject({
model: openai('gpt-4o'),
output: 'enum',
enum: ['action', 'comedy', 'drama', 'horror', 'sci-fi'],
prompt: 'Classify the genre of this movie plot: "A group of astronauts travel through a wormhole in search of a new habitable planet for humanity."',
});4. No-Schema Output
import { generateObject } from 'ai';
import { openai } from '@ai-sdk/openai';
const { object } = await generateObject({
model: openai('gpt-4o'),
output: 'no-schema',
prompt: 'Generate a lasagna recipe.',
});Building a UI for Schema Definition
Let's create a custom interface for defining schemas and generating structured data:
Advanced Features
1. Streaming Objects
For real-time UI updates as the model generates data 2:
import { streamObject } from 'ai';
import { openai } from '@ai-sdk/openai';
import { z } from 'zod';
const { partialObjectStream } = streamObject({
model: openai('gpt-4o'),
schema: z.object({
recipe: z.object({
name: z.string(),
ingredients: z.array(z.string()),
steps: z.array(z.string()),
}),
}),
prompt: 'Generate a lasagna recipe.',
});
for await (const partialObject of partialObjectStream) {
console.log(partialObject); // Updates as the object is generated
}2. Using Images in Prompts
You can include images in your prompts for multimodal models 3:
import { generateObject } from 'ai';
import { openai } from '@ai-sdk/openai';
import { z } from 'zod';
const { object } = await generateObject({
model: openai('gpt-4o'),
schema: z.object({
description: z.string(),
objects: z.array(z.string()),
colors: z.array(z.string()),
}),
messages: [
{
role: 'user',
content: [
{
type: 'text',
text: 'Describe this image in detail',
},
{
type: 'image',
image: new URL('https://example.com/image.jpg'),
},
],
},
],
});Schema Definition Options
The AI SDK supports different schema definition approaches 2:
- Zod Schemas: Most flexible and type-safe
- JSON Schema: For compatibility with OpenAPI specifications
- No Schema: For dynamic, free-form responses
Implementation Considerations
When building your custom object generator:
- Error Handling: Implement robust error handling for schema validation failures
- UI Feedback: Provide real-time feedback during generation with streaming
- Type Safety: Use TypeScript to ensure type safety throughout your application
- Performance: Consider caching results for similar prompts to improve performance
The AI SDK provides a powerful foundation for building structured data generation tools 4, making it easy to create interfaces similar to the ones in your screenshots.
