go-graphql

An implementation of graphql using go based in howtographql tutorial

Getting started

This project is based on https://www.howtographql.com/graphql-go, but i found many problems during the development in the tutorial and I'm addressing it here.

Tip 1 - Regenerate go core logic

To regenerate the core business along with models, remove graph/generated/* and graph/model/* and run go run github.com/99designs/gqlgen

Tip 2 - Updated gqlgen generated files

Everytime the tutorial says to change in resolver.go , you should change graph/schema.resolvers.go instead

Tip 3 - Configuring Mysql docker

To configure a mysql database use:

docker run -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=dbpass -d mysql:latest

If you try to connect with Dbeaver, you'll get an caching_sha2_password error. To solve this problem, open a terminal and run the following commands:

**docker exec -it mysql bash**
mysql -u root -p
use mysql  
select host, user from user;
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Your New Strong Password';
FLUSH PRIVILEGES;

Reference: https://medium.com/@rauf.rahmancz/connect-docker-and-mysql-in-right-way-95602f833cb0

Also, you need to create the table for this project:

CREATE DATABASE hackernews;

Tip 4 - New version of golang-migrate

The version of golang-migrate used in the tutorial is not working anymore (v4 is the only version not depreceated)

go get -u github.com/go-sql-driver/mysql
go build -tags 'mysql' -ldflags="-X main.Version=$(git describe --tags)" -o $GOPATH/bin/migrate github.com/golang-migrate/v4/cmd/migrate
cd internal/pkg/db/migrations/ #Create this directory
migrate create -ext sql -dir mysql -seq create_users_table
migrate create -ext sql -dir mysql -seq create_links_table

And then to run the migration:

migrate -database mysql://root:dbpass@localhost:3306/hackernews -path internal/pkg/db/migrations/mysql up

How to run

git clone https://github.com/thiagocavalcanti/go-graphql.git
go run github.com/99designs/gqlgen #This will generate the models and core graphql logic (generated.go)
go run server.go