Current Limitations of Prisma Safety

Oct 13, 2025 by wbrum.org 84 views

Introduction

Prisma is a popular ORM (Object-Relational Mapping) tool that allows developers to interact with databases using a high-level, declarative language. One of the key features of Prisma is its ability to support multiple schema files, which allows developers to organize their schema definitions in a more modular and maintainable way. However, the current implementation of Prisma Safety, a tool that helps identify potential issues in Prisma schema files, does not support this feature. In this article, we will explore the current limitations of Prisma Safety and propose a solution to add support for multiple schema files.

Current Limitations of Prisma Safety

Prisma Safety is a powerful tool that helps developers identify potential issues in their Prisma schema files. However, when running Prisma Safety with a directory that contains multiple schema files, it throws an error. This error occurs because Prisma Safety is designed to work with a single schema file, and it does not know how to handle multiple files.

Error Message

The error message thrown by Prisma Safety when running with a directory is:

Error: EISDIR: illegal operation on a directory, read
    at async readFileHandle (node:internal/fs/promises:553:24)
    at async Promise.all (index 0)
    at async listSafetyIssues (file:///some_path/node_modules/prisma-safety/dist/prisma-safety.js:15:45)
    at async run (file:///some_path/node_modules/prisma-safety/dist/cli.js:33:26) {
  errno: -21,
  code: 'EISDIR',
  syscall: 'read'
}

This error message indicates that Prisma Safety is trying to read a directory as a file, which is not allowed.

Proposed Solution

To add support for multiple schema files, we propose a new approach that involves reading in all models, merging the ASTs (Abstract Syntax Trees), and then comparing them. This approach will allow Prisma Safety to handle multiple schema files and identify potential issues in a more comprehensive way.

Step 1: Read in All Models

The first step in our proposed solution is to read in all models from the schema files. This can be done using the prisma API, which provides a way to read in schema files and generate an AST.

Step 2: Merge the ASTs

Once we have read in all models, we need to merge the ASTs. This can be done using a library such as ast-merge, which provides a way to merge two or more ASTs into a single AST.

Step 3: Compare the Merged AST

After merging the ASTs, we need to compare them to identify potential issues. This can be done using a library such as diff, which provides a way to compare two or more ASTs and identify the differences.

Implementation

To implement our proposed solution, we will need to make the following changes to the Prisma Safety code:

Add a new function that reads in all models from the schema files.
Add a new function that merges the ASTs.
Add a new function that compares the merged ASTs.
Update the run function to use the new functions.

Example Code

Here is an example of how the new functions could be implemented:

// Read in all models from the schema files
async function readModels(directory) {
  const models = [];
  const files = await fs.readdir(directory);
  for (const file of files) {
    const filePath = path.join(directory, file);
    const model = await prisma.readSchema(filePath);
    models.push(model);
  }
  return models;
}

// Merge the ASTs
async function mergeASTs(models) {
  const mergedAST = {};
  for (const model of models) {
    const ast = await prisma.generateAST(model);
    mergedAST = await astMerge.merge(mergedAST, ast);
  }
  return mergedAST;
}

// Compare the merged AST
async function compareASTs(mergedAST) {
  const differences = await diff.compare(mergedAST, prisma.getAST());
  return differences;
}

// Update the run function to use the new functions
async function run(directory) {
  const models = await readModels(directory);
  const mergedAST = await mergeASTs(models);
  const differences = await compareASTs(mergedAST);
  return differences;
}

Conclusion

In this article, we explored the current limitations of Prisma Safety and proposed a solution to add support for multiple schema files. Our proposed solution involves reading in all models, merging the ASTs, and then comparing them. We also provided an example of how the new functions could be implemented. By adding support for multiple schema files, Prisma Safety will be able to identify potential issues in a more comprehensive way, making it an even more powerful tool for developers.

Future Work

There are several areas where we can improve our proposed solution:

Optimize the merging process: The current implementation of the merging process can be slow for large schema files. We can optimize this process by using a more efficient algorithm or by parallelizing the merging process.
Improve the comparison process: The current implementation of the comparison process can be slow for large schema files. We can improve this process by using a more efficient algorithm or by parallelizing the comparison process.
Add support for other Prisma features: Prisma Safety currently only supports the prisma API. We can add support for other Prisma features, such as the prisma migrate API, to make Prisma Safety an even more powerful tool for developers.

Introduction

Prisma Safety is a powerful tool that helps developers identify potential issues in their Prisma schema files. In this article, we will answer some of the most frequently asked questions about Prisma Safety.

Q: What is Prisma Safety?

A: Prisma Safety is a tool that helps developers identify potential issues in their Prisma schema files. It checks the schema files for errors, inconsistencies, and potential security vulnerabilities.

Q: What are the benefits of using Prisma Safety?

A: The benefits of using Prisma Safety include:

Improved code quality: Prisma Safety helps developers identify potential issues in their schema files, which can improve the overall quality of their code.
Reduced errors: Prisma Safety can help developers catch errors and inconsistencies in their schema files before they cause problems in their applications.
Improved security: Prisma Safety can help developers identify potential security vulnerabilities in their schema files, which can improve the security of their applications.

Q: How does Prisma Safety work?

A: Prisma Safety works by reading in the schema files and generating an Abstract Syntax Tree (AST) for each file. It then compares the ASTs to identify potential issues.

Q: What types of issues can Prisma Safety identify?

A: Prisma Safety can identify a wide range of issues, including:

Syntax errors: Prisma Safety can identify syntax errors in the schema files, such as missing or mismatched brackets.
Type errors: Prisma Safety can identify type errors in the schema files, such as using a string where a number is expected.
Inconsistencies: Prisma Safety can identify inconsistencies in the schema files, such as using different data types for the same field.
Security vulnerabilities: Prisma Safety can identify potential security vulnerabilities in the schema files, such as using a weak password or storing sensitive data in an insecure way.

Q: How do I use Prisma Safety?

A: To use Prisma Safety, you will need to install it as a dependency in your project and then run it against your schema files. You can do this by running the following command in your terminal:

npm install prisma-safety
npx prisma-safety

Q: Can I customize Prisma Safety?

A: Yes, you can customize Prisma Safety by creating a configuration file that specifies the rules and settings you want to use. You can do this by creating a file called prisma-safety.config.js in the root of your project and adding the following code:

module.exports = {
  rules: {
    // Add rules here
  },
  settings: {
    // Add settings here
  },
};

Q: Is Prisma Safety compatible with other Prisma tools?

A: Yes, Prisma Safety is compatible with other Prisma tools, such as Prisma Migrate and Prisma Studio. You can use Prisma Safety in conjunction with these tools to improve the overall quality and security of your Prisma schema files.

Q: Can I use Prisma Safety with other databases?

A: Yes, Prisma Safety can be used with other databases, such as PostgreSQL and MySQL. However, you will need to install the corresponding Prisma driver for your database and configure Prisma Safety to use it.

Conclusion

In this article, we have answered some of the most frequently asked questions about Prisma Safety. We hope this information has been helpful in understanding how to use Prisma Safety and how it can improve the quality and security of your Prisma schema files. If you have any further questions, please don't hesitate to contact us.