mariospas / gqlgenc

This is Go library for building GraphQL client with gqlgen

Changes

support many queries and mutations without operation names as we designed the queries from the client side very useful for dgraph

usecase:

1. run dgraph
2. create graphql schema for dgraph database (dgraph generates many queries and mutations related to your schema)
3. create client custom queries and mutations
4. generate client go graphql code that works with dgraph

Goal:

• auto generate code needed to do all the database communications

Content from gqlgenc

What is gqlgenc ?

This is Go library for building GraphQL client with gqlgen

Motivation

Now, if you build GraphQL api client for Go, have choice:

• github.com/shurcooL/graphql
• github.com/machinebox/graphql

These libraries are very simple and easy to handle. However, as I work with gqlgen and graphql-code-generator every day, I find out the beauty of automatic generation. So I want to automatically generate types.

Installation

go get -u github.com/mariospas/gqlgenc

How to use

Client Codes Only

gqlgenc base is gqlgen with plugins. So the setting is yaml in each format. gqlgenc can be configured using a .gqlgenc.yml file

Load a schema from a remote server:

model:
  package: generated
  filename: ./models_gen.go # https://github.com/99designs/gqlgen/tree/master/plugin/modelgen
client:
  package: generated
  filename: ./client.go # Where should any generated client go?
models:
  Int:
    model: github.com/99designs/gqlgen/graphql.Int64
  Date:
    model: github.com/99designs/gqlgen/graphql.Time
endpoint:
  url: https://api.annict.com/graphql # Where do you want to send your request?
  headers: # If you need header for getting introspection query, set it
    Authorization: "Bearer ${ANNICT_KEY}" # support environment variables
query:
  - "./query/*.graphql" # Where are all the query files located?
generate:
  clientV2: true # Generate a Client that provides a new signature
  clientInterfaceName: "GithubGraphQLClient" # Determine the name of the generated client interface

Load a schema from a local file:

model:
  package: generated
  filename: ./models_gen.go # https://github.com/99designs/gqlgen/tree/master/plugin/modelgen
client:
  package: generated
  filename: ./client.go # Where should any generated client go?
models:
  Int:
    model: github.com/99designs/gqlgen/graphql.Int64
  Date:
    model: github.com/99designs/gqlgen/graphql.Time
schema:
  - "schema/**/*.graphql" # Where are all the schema files located?
query:
  - "./query/*.graphql" # Where are all the query files located?
generate:
  clientV2: true # Generate a Client that provides a new signature
  clientInterfaceName: "GithubGraphQLClient" # Determine the name of the generated client interface

Execute the following command on same directory for .gqlgenc.yml

gqlgenc

or if you want to specify a different directory where .gqlgenc.yml file resides (e.g. in this example the directory is schemas):

gqlgenc generate --configdir schemas

With gqlgen

Do this when creating a server and client for Go. You create your own entrypoint for gqlgen. This use case is very useful for testing your server.

package main

import (
	"fmt"
	"os"

	"github.com/mariospas/gqlgenc/clientgen"

	"github.com/99designs/gqlgen/api"
	"github.com/99designs/gqlgen/codegen/config"
)

func main() {
	cfg, err := config.LoadConfigFromDefaultLocations()
	if err != nil {
		fmt.Fprintln(os.Stderr, "failed to load config", err.Error())
		os.Exit(2)
	}
	queries := []string{"client.query", "fragemt.query"}
	clientPackage := config.PackageConfig{
		Filename: "./client.go",
		Package:  "gen",
	}

	clientPlugin := clientgen.New(queries, clientPackage)
	err = api.Generate(cfg,
		api.AddPlugin(clientPlugin),
	)
	if err != nil {
		fmt.Fprintln(os.Stderr, err.Error())
		os.Exit(3)
	}
}

Documents

• How to configure gqlgen using gqlgen.yml
• How to write plugins for gqlgen

Comments

Japanese Comments

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Subscription

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Pre-conditions

clientgen is created based on modelgen. So if you don't have a modelgen, it may be a mysterious move.