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@prisma/generator-helper

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@prisma/generator-helper

This package is intended for Prisma's internal use

  • 6.0.1
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What is @prisma/generator-helper?

@prisma/generator-helper is a utility package designed to assist in the creation of custom generators for Prisma. It provides a set of tools and types to facilitate the development of generators that can extend or customize the behavior of Prisma's schema and client generation.

What are @prisma/generator-helper's main functionalities?

Generator Definition

This feature allows you to define a custom generator by specifying the manifest and generation logic. The `onManifest` function provides metadata about the generator, while the `onGenerate` function contains the logic to execute when the generator is run.

const { generatorHandler } = require('@prisma/generator-helper');
generatorHandler({
  onManifest() {
    return {
      defaultOutput: 'default-output-path',
      prettyName: 'My Custom Generator',
    };
  },
  onGenerate(options) {
    console.log('Generating with options:', options);
  },
});

Helper Types

The package provides TypeScript types for Prisma's Data Model Meta Format (DMMF), which can be used to type-check and process the Prisma schema programmatically.

const { DMMF } = require('@prisma/generator-helper');

/**
 * @param {DMMF.Document} dmmf
 */
function processDMMF(dmmf) {
  console.log('Processing DMMF:', dmmf);
}

File Writing Utilities

This feature includes utilities for safely writing files, ensuring that directories are created as needed and that existing files are not overwritten unintentionally.

const { writeFileSafely } = require('@prisma/generator-helper');
const path = require('path');

const outputPath = path.join(__dirname, 'output.txt');
writeFileSafely(outputPath, 'Generated content').then(() => {
  console.log('File written successfully');
});

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Package last updated on 02 Dec 2024

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