How to create multiple objects from a single file upload in Sanity?

import {createClient} from '@sanity/client'

const client = createClient({
  projectId: 'your-project-id',
  dataset: 'your-dataset',
  apiVersion: '2024-01-01',
  token: 'your-write-token', // Required for creating documents
  useCdn: false
})

// Example: Load and parse your file, then create documents
async function createDocumentsFromFile(fileData) {
  // Parse your file data into an array of objects
  const items = parseYourFile(fileData) // Your parsing logic here
  
  // Create a transaction for multiple documents
  const transaction = client.transaction()
  
  items.forEach(item => {
    transaction.create({
      _type: 'yourDocumentType',
      // Map your file data to document fields
      title: item.title,
      description: item.description,
      // ... other fields from your file
    })
  })
  
  // Commit all documents at once (atomic operation)
  try {
    const result = await transaction.commit()
    console.log(`Created ${result.results.length} documents`)
    return result
  } catch (error) {
    console.error('Transaction failed:', error)
    throw error
  }
}

async function bulkCreateDocuments(items) {
  const batchSize = 100 // Adjust based on your needs
  
  for (let i = 0; i < items.length; i += batchSize) {
    const batch = items.slice(i, i + batchSize)
    const transaction = client.transaction()
    
    batch.forEach(item => {
      transaction.create({
        _type: 'yourDocumentType',
        ...item
      })
    })
    
    await transaction.commit()
    console.log(`Processed batch ${Math.floor(i / batchSize) + 1}`)
  }
}

// sanity.blueprint.ts
import {defineBlueprint} from 'sanity'

export default defineBlueprint({
  functions: [
    {
      name: 'process-file',
      handler: async (event, context) => {
        const {fileData} = event.body
        const client = context.getClient()
        
        // Parse your file
        const items = parseFile(fileData)
        
        // Create documents in batches
        const batchSize = 100
        for (let i = 0; i < items.length; i += batchSize) {
          const batch = items.slice(i, i + batchSize)
          const transaction = client.transaction()
          
          batch.forEach(item => {
            transaction.create({
              _type: 'yourType',
              ...item
            })
          })
          
          await transaction.commit()
        }
        
        return {success: true, count: items.length}
      }
    }
  ]
})