GraphQL with Golang
A GraphQL complete example using Golang & PostgreSQL
Installation
Install the dependencies
go get github.com/graphql-go/graphql
go get github.com/graphql-go/handler
go get github.com/lib/pq
Install & create postgres database
brew install postgres
createuser graphql --createdb
createdb graphql -U graphql
psql graphql -U graphql
Note: Non-Mac users follow official doc to install the PostgreSQL
Create the tables
CREATE TABLE IF NOT EXISTS authors
(
id serial PRIMARY KEY,
name varchar(100) NOT NULL,
email varchar(150) NOT NULL,
created_at date
);
CREATE TABLE IF NOT EXISTS posts
(
id serial PRIMARY KEY,
title varchar(100) NOT NULL,
content text NOT NULL,
author_id int,
created_at date
);
Usage
Query to get the all authors
query {
authors {
id
name
email
created
}
}
Query to get a specific author
query {
author(id: 1) {
id
name
email
}
}
Create new author using mutation
mutation {
createAuthor(name: "Sohel Amin", email: "[email protected]") {
id
name
email
}
}
Update an author using mutation
mutation {
updateAuthor(id: 2, name: "Sohel Amin Shah", email: "[email protected]") {
id
name
email
}
}
Delete an author using mutation
mutation {
deleteAuthor(id: 2) {
id
}
}
Query to get the posts with its relation author
query {
posts {
id
title
content
author {
id
name
email
}
}
}
