Example GraphQL API implemented in Go and backed by Postgresql
To run this project you need to:
- install golang, see this guide
- install Masterminds/glide which is a package manager for golang projects.
- install all the dependencies for this project:
glide install, glide will store all dependencies in/vendorfolder. - install postgresql (for ubuntu follow this guide). For this application, I created a postgresql user called
vagrantwithvagrantas password and the database calledgraphql, but of course you can change these settings in./migrate.shand in./main.gofiles. - install mattes/migrate which is a tool to create and run migrations against sql databases.
- run the migrations which will create the database tables and indexes
./migrate.sh up. If you ever want to clean up the the database run./migrate.sh downthen./migrate.sh upagain.
This application exposes a single endpoints /graphql which accepts both mutations and queries.
The following are examples of curl calls to this endpoint:
curl -XPOST http://vm:8080/graphql -d 'mutation {createUser(email:"1@x.co"){id, email}}'
curl -XPOST http://vm:8080/graphql -d 'mutation {createUser(email:"2@y.co"){id, email}}'
curl -XPOST http://vm:8080/graphql -d 'mutation {follow(follower:1, followee:2)}'
curl -XPOST http://vm:8080/graphql -d 'mutation {unfollow(follower:1, followee:2)}'
curl -XPOST http://vm:8080/graphql -d '{user(id:2){followers{id, email}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){followers{id, email}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:2){follower(id:1){ email}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){followees{email}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){followee(id:2){email}}}'
curl -XPOST http://vm:8080/graphql -d 'mutation {createPost(user:1,title:"p1",body:"b1"){id}}'
curl -XPOST http://vm:8080/graphql -d 'mutation {createComment(user:1,post:1,title:"t1",body:"b1"){id}}'
curl -XPOST http://vm:8080/graphql -d 'mutation {removeComment(id:1)}'
curl -XPOST http://vm:8080/graphql -d 'mutation {removePost(id:1)}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){post(id:2){title,body}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){posts{id,title,body}}}'
curl -XPOST http://vm:8080/graphql -d '{user(id:1){post(id:2){user{id,email}}}}'