Update Prisma API

Goals

On this page, you will learn how to:

• Change the data model of your Prisma service
• Deploy the adjusted data model to update your Prisma API
• Send nested queries and mutations

Adjust your data model

Update the data model in datamodel.graphql as follows. You are adding a new Post type to the data model as well as a relation between User and Post (via the posts and author fields):

type User {
  id: ID! @unique
  name: String!
  posts: [Post!]!
}

type Post {
  id: ID! @unique
  title: String!
  published: Boolean! @default(value: "false")
  author: User
}
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(Re-)Deploy your Prisma service

To apply the changes you just made to your data model, you need to (re-)deploy your Prisma service:

prisma deploy
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Explore the Prisma API in a Playground

Open a GraphQL Playground using the following command:

prisma playground
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Because of the relation that was added to the data model, you can now send nested queries and mutations to read and modify connected nodes.

mutation {
  createPost(
    data: { title: "GraphQL is great", author: { create: { name: "Bob" } } }
  ) {
    id
    published
    author {
      id
    }
  }
}
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