GraphQL implementation in go based on the working draft.

The code works, but is far from production grade and does not implement the entire working draft. Exploring models for an executor, expect this to change

• 2.1 Comments
• 2.2 Names
• 2.3 Document
• 2.4 Operations
• 2.5 Fields
• 2.6 Field Selections
• 2.7 Arguments
• 2.8 Field Alias
• 2.9 Input Values
• 2.10 Variables
• 2.11 Fragments
• 2.12 Directives
• 3. Type System
• 4. Introspection
• 5. Validation
• 6. Execution
• 7. Response
• 8. Grammar

This is a Go implementation of GraphQL. The intent is to create a high quality library suitable for production deployments.

The famous "hello world" in graphql:

package main

import (
	"os"

	"github.com/savaki/graphql"
	"github.com/savaki/graphql/provider/mapq"
)

func main() {
	model := map[string]interface{}{"hello": "world"}
	store := mapq.New(model)
	graphql.New(store).Handle(`{hello}`, os.Stdout)
	// prints {"hello":"world"}
}

To implement a graphql service, one needs to implement the graphql.Store interface. For convenience and as examples, a number of default Store implementations are provided:

• github.com/savaki/graphql/provider/mapq - access static map[string]interface{}
• github.com/savaki/graphql/provider/jsonq - provides a rest gateway

Here's an example using the jsonq provider to access a generic rest service.

package main

import (
	"os"

	"github.com/savaki/graphql/provider/restq"
	"github.com/savaki/graphql"
)

func main() {
	query := `query city: GET("http://api.openweathermap.org/data/2.5/weather?q=London") {
		name
		weather: main {
			temperature: temp
		}
	}`

	store := restq.New()
	graphql.New(store).Handle(query, os.Stdout)
}

• graphql working draft - 2015.07.02