How to query Enum using Prisma?

2 min read 05-10-2024

Querying Enums with Prisma: A Comprehensive Guide

Enums, or enumerations, are a powerful tool for representing fixed sets of values in your database. But how do you efficiently query these values using Prisma? This guide will equip you with the knowledge and tools to master enum querying with Prisma.

The Challenge: Understanding Enum Queries

Imagine you have a database for managing a clothing store. You use an enum to define the possible sizes for your products:

enum Size {
  XS = 'XS',
  S = 'S',
  M = 'M',
  L = 'L',
  XL = 'XL',
}

Now, let's say you want to retrieve all products with size "M". How would you approach this with Prisma?

The Solution: Leveraging Prisma's Query Language

Prisma offers a powerful query language that allows you to filter your data effectively. Here's how you can query an enum using Prisma:

const products = await prisma.product.findMany({
  where: {
    size: Size.M,
  },
});

This simple query retrieves all products with a size of "M." You directly reference the enum member Size.M within the where clause, making your query clear and readable.

Key Considerations:

String-Based Enums: Prisma defaults to string-based enums. This means your enum members are stored as strings in the database, facilitating flexible filtering.
Filtering Multiple Values: You can query for multiple enum values using the in operator:

const products = await prisma.product.findMany({
  where: {
    size: {
      in: [Size.S, Size.M],
    },
  },
});

Case-Sensitivity: Remember that string-based enums are case-sensitive by default. If you need case-insensitive filtering, consider using the lower function in your query.

Example: Finding Products with Specific Colors

Let's extend our example with another enum for colors:

enum Color {
  Red = 'Red',
  Blue = 'Blue',
  Green = 'Green',
}

Now, let's find all products with size "M" and color "Red":

const products = await prisma.product.findMany({
  where: {
    size: Size.M,
    color: Color.Red,
  },
});

Conclusion: Querying Enums with Confidence

Prisma's powerful query language makes it easy to filter your data based on enum values. By understanding the fundamentals of enum querying, you can leverage the full potential of Prisma for managing your database and achieving efficient data retrieval.

References:

Remember to explore the official Prisma documentation for in-depth information and advanced query techniques. Happy coding!