Schema and Database

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Cassandra Open Education

Cassandra

Prisma Schema

Schema and Database

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Schema and Database

The backend for Cassandra was created using GraphQL through Prisma.

To access the playground for testing queries and mutations, or to view the backend documentation, visit the URL address:
https://eu1.prisma.sh/tim-dommett/demo/dev
 This can also be used as the http endpoint for any frontend development. (This database endpoint is safe for use and to be distributed as no payment information has been associated to this account)
The schema design is as follows:
type User {
  id: ID! @id
  userName: String!
  email: String
  password: String!
  reviews: [Review!]! @relation(name: "UserReviews")
  comments: [Comment!]! @relation(name: "UserComments")
  votes: [Vote!]! @relation(name: "UserVotes")
}
​
​
type Video {
  id: ID! @id
  title: String
  description: String
  externalURL: String
  categories: [Category!]! @relation(name: "VideoCategory")
  reviews: [Review!]! @relation(name: "VideoReview")
  comments: [Comment!]! @relation(name: "VideoComment")
  votes: [Vote!]! @relation(name: "VideoVote")
}
​
type ExternalResource {
  id: ID! @id
  title: String
  description: String
  linkURL: String
  logoURL: String
  categories: [Category!]! @relation(name: "ResourceCategory")
  reviews: [Review!]! @relation(name: "ResourceReview")
  comments: [Comment!]! @relation(name: "ResourceComment")
  votes: [Vote!]! @relation(name: "ResourceVote")
}
​
type Review {
  id: ID! @id
  rating: Int!
  review: String!
  user: User @relation(name: "UserReviews")
  externalResource: ExternalResource @relation(name: "ResourceReview")
  video: Video @relation(name: "VideoReview")
}
​
type Comment {
  id: ID! @id
  comment: String!
  user: User @relation(name: "UserComments")
  externalResource: ExternalResource @relation(name: "ResourceComment")
  video: Video @relation(name: "VideoComment")
}
​
type Vote {
  id: ID! @id
  positive: Boolean! @default(value: true)
  user: User @relation(name: "UserVotes")
  externalResource: ExternalResource @relation(name: "ResourceVote")
  video: Video @relation(name: "VideoVote")
}
​
type Category {
  id: ID! @id
  category: String
  video: Video @relation(name: "VideoCategory")
  externalResource: ExternalResource @relation(name: "ResourceCategory")
}
​
​
​
​
​

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