Modern Haskell Webserver Boilerplate

• Graphql API
  • morpheus-graphql (https://github.com/morpheusgraphql/morpheus-graphql)
  • Schema is in schema.graphql

    type User {
        id: Int!
        email: String!
        name: String!
        updatedAt: String!
        createdAt: String!
    }
  
    type Session {
        token: String!
        user: User!
    }
  
    type Query {
        login(email: String!, password: String!): Session!
        myUserInfo: User!
    }
  
    type Mutation {
        register(email: String!, password: String!, name: String!): Session!
        changePassword(oldPassword: String!, newPassword: String!): Boolean!
    }

• Database:
  • Postgresql + Opaleye
  • Migration using dbmate (https://github.com/amacneil/dbmate)
  • Pooling using Data.Pool

This boilerplate wires up:

• Reading .env using envy
• Database
• Graphql API
• Authorization using JWT
• Monad transformers

Running

• Feed in you database & secret in .env:

  $ cp .env.default .env
  

  DATABASE_URL="postgres://Dandoh:dandoh@127.0.0.1:5432/webhaskell?sslmode=disable"
  JWT_SECRET="my_jwt_secret"

• Migrations

  $ dbmate up
  

  • More uses refer https://github.com/amacneil/dbmate
• Run webserver

  $ stack run
  

Now GraphQL API is at http://localhost:8080/api

You can also access Graphql Playground at http://localhost:8080/graphiql

Running on Docker

• Feed in you database & secret in .env:

  $ cp .env.default .env
  

• (Optional) Edit anything you need in the .env file

• Create and start docker containers

  $ docker-compose up
  

• Now you can visit: http://localhost:8080/ in your local machine.

• Migrations will automatically run, and you can run them manually anytime using

  $ docker-compose up dbmate
  

• Stack will restart whenever you change any .hs file, thanks to entr

Contributors

PR are more than welcome. The only note is we use ormolu to format codes.

• Nhan Thai
• Pacific01
• Emad Shaaban