Understand PrismaPrisma & Traditional ORMs

Prisma & Sequelize

Learn how Prisma compares to Sequelize

Overview

This page compares Prisma with Sequelize. Here is a high-level overview:

PrismaSequelize
Auto-generated DB client
Type-safe
Declarative data modelling & migrations
Connection pooling
Supported DB typesDocument & RelationalRelational
Supported ORM patternsDataMapperActiveRecord
Fluent API for relations
Relation filters
Raw database access
Transactional nested writes
Manual transactions

In the following, you find a detailled comparison of the Sequelize and Prisma APIs.

Fetching single objects

Prisma

const user = await prisma.user({ id })

Sequelize

const user = await User.findByPk(id)

Fetching selected scalars of single objects

Prisma

const userFragment = await prisma.user({ id }).$fragment(`
  fragment NameAndEmail on User { id email }`
`)

Sequelize

const user = await User.findByPk(id, attributes: {
  ["name", "email"]
})

Fetching relations

Prisma

Fluent API
Using fragments
Native GraphQL
const postsByUser = await prisma
  .user({ id })
  .posts()

While the $fragment and the $graphql APIs each return a user object that includes a posts array, the fluent API returns just the posts array and no data about the user.

See the following GitHub issues to learn more about planned iterations of the Prisma client relations API:

Sequelize

const user = await User.findByPk(id, {
  include: [{
    model: Post
  }]
})

Filtering for concrete values

Prisma

const users = await prisma.users({
  where: {
    name: "Alice"
  }
})

Sequelize

const user = User.findAll({
  where: {
    name: "Alice"
  }
})

Other filter criteria

Prisma

Prisma generates many additional filters that are commonly used in modern application development:

  • <field>_ends_with & <field>_starts_with
  • <field>_not_ends_with & <field>_not_starts_with
  • <field>_gt & <field>_gte
  • <field>_lt & <field>_lte
  • <field>_contains & <field>_not_contains
  • <field>_in & <field>_not_in

Sequelize

Sequelize has an extensive set of operators to be found here.

Relation filters

Prisma

Prisma lets you filter a list based on a criteria that applies not only to the models of the list being retrieved, but to a relation of that model.

For example, you want to fetch only those users that wrote a post with the title "Hello World":

query {
  user(where: {
    posts_some: {
      title: "Hello World"
    }
  }) {
    id
  }
}

Sequelize

Sequelize doesn't offer a dedicated API for relation filters. You can get similar functionality by sending a raw SQL query to the database.

Creating objects

Prisma

const user = await prisma.createUser({
  name: "Alice",
  email: "alice@prisma.io"
})

Sequelize

Using `save`
Using `create`
const user = User.build({
  name: "Alice",
  email: "alice@prisma,io"
})
await user.save()

Updating objects

Prisma

const updatedUser = await prisma.updateUser({
  where: { id },
  data: {
    name: "James",
    email: "james@prisma.io"
  }
})

Sequelize

Using `save`
Using `update`
user.name = "James"
user.email =" alice@prisma.com"
await user.save()

Deleting objects

Prisma

const deletedUser = await prisma.deleteUser({ id })

Sequelize

await user.destroy()

Batch updates

Prisma

const updatedUsers = await prisma
  .updateManyUsers({
    data: { role: "ADMIN" },
    where: {
      email_ends_with: "@prisma.io"
    }
  })

Sequelize

const updatedUsers = await User.update({ 
  { role: "Admin" },
  where: {
    email: {
      [Op.like]: "%@prisma.io"
    }
  },
})

Batch deletes

Prisma

await prisma.deleteManyUsers({
  id_in: [id1, id2, id3]
})

Sequelize

await User.destroy({
  where: {
    id: {
      [Op.in]: [id1, id2, id3]
    }
  }
})

Transactions

Prisma

const newUser = await prisma.createUser({
  name: "Bob",
  email: "bob@prisma.io",
  posts: {
    create: [
      { title: "Join us for GraphQL Conf in 2019" },
      { title: "Subscribe to GraphQL Weekly for GraphQL news" }
    ]
  }
})

Sequelize

Manual
Automatic
return sequelize.transaction(async t => {
  const user = await User.create({
    name: "Alice",
    email: "alice@prisma,io"
  }, { 
    transaction: t 
  })
  const post1 = await Post.create({
    title: "Join us for GraphQL Conf in 2019"
  }, { 
    transaction: t 
  })
  const post2 = await Post.create({
    title: "Subscribe to GraphQL Weekly for GraphQL news"
  }, { 
    transaction: t 
  })
  await user.setPosts([post1, post2])
})