Go GraphQL ToDo example

An example that consists of basic core GraphQL queries and mutations.

To run the example navigate to the example directory by using your shell of choice.

cd examples/todo

Run the example, it will spawn a GraphQL HTTP endpoint

go run main.go

Execute queries via shell.

// To get single ToDo item by IDcurl -g 'http://localhost:8080/graphql?query={todo(id:"b"){id,text,done}}'
// To create a ToDo itemcurl -g 'http://localhost:8080/graphql?query=mutation+_{createTodo(text:"My+new+todo"){id,text,done}}'
// To get a list of ToDo itemscurl -g 'http://localhost:8080/graphql?query={todoList{id,text,done}}'
// To update a ToDocurl -g 'http://localhost:8080/graphql?query=mutation+_{updateTodo(id:"b",text:"My+new+todo+updated",done:true){id,text,done}}'

Web App

Access the web app at http://localhost:8080/. It is work in progress and currently is simply loading todos by using jQuery ajax call.

Main

main.go

package main
import (    "encoding/json"    "fmt"    "math/rand"    "net/http"    "time"
    "github.com/graphql-go/graphql"    "github.com/graphql-go/graphql/examples/todo/schema")
func init() {    todo1 := schema.Todo{ID: "a", Text: "A todo not to forget", Done: false}    todo2 := schema.Todo{ID: "b", Text: "This is the most important", Done: false}    todo3 := schema.Todo{ID: "c", Text: "Please do this or else", Done: false}    schema.TodoList = append(schema.TodoList, todo1, todo2, todo3)
    rand.Seed(time.Now().UnixNano())}
func executeQuery(query string, schema graphql.Schema) *graphql.Result {    result := graphql.Do(graphql.Params{        Schema:        schema,        RequestString: query,    })    if len(result.Errors) > 0 {        fmt.Printf("wrong result, unexpected errors: %v", result.Errors)    }    return result}
func main() {    http.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {        result := executeQuery(r.URL.Query().Get("query"), schema.TodoSchema)        json.NewEncoder(w).Encode(result)    })    // Serve static files    fs := http.FileServer(http.Dir("static"))    http.Handle("/", fs)    // Display some basic instructions    fmt.Println("Now server is running on port 8080")    fmt.Println("Get single todo: curl -g 'http://localhost:8080/graphql?query={todo(id:\"b\"){id,text,done}}'")    fmt.Println("Create new todo: curl -g 'http://localhost:8080/graphql?query=mutation+_{createTodo(text:\"My+new+todo\"){id,text,done}}'")    fmt.Println("Update todo: curl -g 'http://localhost:8080/graphql?query=mutation+_{updateTodo(id:\"a\",done:true){id,text,done}}'")    fmt.Println("Load todo list: curl -g 'http://localhost:8080/graphql?query={todoList{id,text,done}}'")    fmt.Println("Access the web app via browser at 'http://localhost:8080'")
    http.ListenAndServe(":8080", nil)}