'Mutation'

codeqianfen/c.js

@@ -0,0 +1,57 @@
+const express=require('express');
+const {buildSchema}=require('graphql');
+const { graphqlHTTP } = require('express-graphql');
+
+const schema=buildSchema(`
+   type Product {
+    name: String
+    upc: String
+   }
+   input ProductInput {
+    name: String
+    upc: String
+   }
+   type Mutation{
+    addP(input: ProductInput): Product
+    updateP(id:ID!,input: ProductInput): Product
+   }
+   type Query{
+    product:[Product]
+   }
+`)
+const dataDb={};
+const root ={
+    product(){
+        var arr=[];
+        for(const k in dataDb){
+            arr.push(dataDb[k]);
+        }
+        return arr;
+    },
+    addP({input}){
+        dataDb[input.name]=input;
+        return dataDb[input.name];
+    },
+    updateP({id, input}){
+       const pro = Object.assign({},dataDb[id],input);
+       dataDb[id] = pro;
+       return pro;
+    }
+}
+
+const app = express();
+
+app.use('/graphql',graphqlHTTP({
+  schema: schema,
+  rootValue: root,
+  graphiql: true
+}))
+
+app.use(express.static('public'))
+
+app.listen(3000);
+// # query {product {name upc}}
+// # mutation{addP(input: {name:"egg",upc:"xxxx"}) {name upc}}
+// # mutation{addP(input: {name:"milk",upc:"1xxx"}) {name upc}}
+// # mutation{updateP(id:"milk",input: {name:"milk",upc:"2ssx2x"}) {name upc}}
+// # mutation{updateP(id:"milk",input: {name:"milk",upc:"3ssx33x"}) {name upc}}