Merge pull request #512 from hezhizhen/update_crud_example

Update CRUD example

examples/crud/Readme.md

@@ -1,25 +1,25 @@
 # Go GraphQL CRUD example
 
-Implementation create, read, update and delete on Go    
+Implement create, read, update and delete on Go.
 
-To run the program, go to the directory    
-`cd examples/crud`
+To run the program:
 
-Run the example    
-`go run main.go`
+1. go to the directory: `cd examples/crud`
+2. Run the example: `go run main.go`
 
 ## Create
+
 `http://localhost:8080/product?query=mutation+_{create(name:"Inca Kola",info:"Inca Kola is a soft drink that was created in Peru in 1935 by British immigrant Joseph Robinson Lindley using lemon verbena (wiki)",price:1.99){id,name,info,price}}`
 
 ## Read
-Get single product by id    
-`http://localhost:8080/product?query={product(id:1){name,info,price}}`
 
-Get product list    
-`http://localhost:8080/product?query={list{id,name,info,price}}`
+* Get single product by id: `http://localhost:8080/product?query={product(id:1){name,info,price}}`
+* Get product list: `http://localhost:8080/product?query={list{id,name,info,price}}`
 
 ## Update
+
 `http://localhost:8080/product?query=mutation+_{update(id:1,price:3.95){id,name,info,price}}`
 
 ## Delete
+
 `http://localhost:8080/product?query=mutation+_{delete(id:1){id,name,info,price}}`

examples/crud/main.go

@@ -10,14 +10,34 @@ import (
 	"github.com/graphql-go/graphql"
 )
 
+// Product contains information about one product
 type Product struct {
 	ID    int64   `json:"id"`
 	Name  string  `json:"name"`
 	Info  string  `json:"info,omitempty"`
 	Price float64 `json:"price"`
 }
 
-var products []Product
+var products = []Product{
+	{
+		ID:    1,
+		Name:  "Chicha Morada",
+		Info:  "Chicha morada is a beverage originated in the Andean regions of Perú but is actually consumed at a national level (wiki)",
+		Price: 7.99,
+	},
+	{
+		ID:    2,
+		Name:  "Chicha de jora",
+		Info:  "Chicha de jora is a corn beer chicha prepared by germinating maize, extracting the malt sugars, boiling the wort, and fermenting it in large vessels (traditionally huge earthenware vats) for several days (wiki)",
+		Price: 5.95,
+	},
+	{
+		ID:    3,
+		Name:  "Pisco",
+		Info:  "Pisco is a colorless or yellowish-to-amber colored brandy produced in winemaking regions of Peru and Chile (wiki)",
+		Price: 9.95,
+	},
+}
 
 var productType = graphql.NewObject(
 	graphql.ObjectConfig{
@@ -204,17 +224,7 @@ func executeQuery(query string, schema graphql.Schema) *graphql.Result {
 	return result
 }
 
-func initProductsData(p *[]Product) {
-	product1 := Product{ID: 1, Name: "Chicha Morada", Info: "Chicha morada is a beverage originated in the Andean regions of Perú but is actually consumed at a national level (wiki)", Price: 7.99}
-	product2 := Product{ID: 2, Name: "Chicha de jora", Info: "Chicha de jora is a corn beer chicha prepared by germinating maize, extracting the malt sugars, boiling the wort, and fermenting it in large vessels (traditionally huge earthenware vats) for several days (wiki)", Price: 5.95}
-	product3 := Product{ID: 3, Name: "Pisco", Info: "Pisco is a colorless or yellowish-to-amber colored brandy produced in winemaking regions of Peru and Chile (wiki)", Price: 9.95}
-	*p = append(*p, product1, product2, product3)
-}
-
 func main() {
-	// Primary data initialization
-	initProductsData(&products)
-
 	http.HandleFunc("/product", func(w http.ResponseWriter, r *http.Request) {
 		result := executeQuery(r.URL.Query().Get("query"), schema)
 		json.NewEncoder(w).Encode(result)