Update examples

Author: MichalLytek

examples/middlewares-custom-decorators/decorators/current-user.ts

@@ -1,6 +1,6 @@
-import { createParamDecorator } from "type-graphql";
+import { createParameterDecorator } from "type-graphql";
 import { type Context } from "../context.type";
 
 export function CurrentUser() {
-  return createParamDecorator<Context>(({ context }) => context.currentUser);
+  return createParameterDecorator<Context>(({ context }) => context.currentUser);
 }

examples/middlewares-custom-decorators/decorators/random-id.ts

@@ -0,0 +1,24 @@
+import { Int, createParameterDecorator } from "type-graphql";
+
+const MAX_ID_VALUE = 3; // Number.MAX_SAFE_INTEGER
+
+export function RandomId(argName = "id") {
+  return createParameterDecorator(
+    ({ args }) => args[argName] ?? Math.round(Math.random() * MAX_ID_VALUE),
+    {
+      arg: {
+        name: argName,
+        typeFunc: () => Int,
+        options: {
+          nullable: true,
+          description: "Accepts provided id or generates a random one.",
+          validateFn: (value: number): void => {
+            if (value < 0 || value > MAX_ID_VALUE) {
+              throw new Error(`Invalid value for ${argName}`);
+            }
+          },
+        },
+      },
+    },
+  );
+}

examples/middlewares-custom-decorators/examples.graphql

@@ -20,3 +20,21 @@ query InterceptorsQuery {
     averageRating
   }
 }
+
+query RandomIdQuery {
+  recipe {
+    id
+    title
+    averageRating
+    description
+  }
+}
+
+query SelectedIdQuery {
+  recipe(id: 2) {
+    id
+    title
+    averageRating
+    description
+  }
+}

examples/middlewares-custom-decorators/recipe/recipe.data.ts

@@ -1,7 +1,13 @@
 import { Recipe } from "./recipe.type";
 
+let lastRecipeId = 0;
+
 function createRecipe(recipeData: Partial<Recipe>): Recipe {
-  return Object.assign(new Recipe(), recipeData);
+  return Object.assign(new Recipe(), {
+    // eslint-disable-next-line no-plusplus
+    id: lastRecipeId++,
+    ...recipeData,
+  });
 }
 
 export const recipes = [

examples/middlewares-custom-decorators/recipe/recipe.resolver.ts

@@ -4,6 +4,7 @@ import { RecipesArgs } from "./recipe.args";
 import { recipes as recipesData } from "./recipe.data";
 import { Recipe } from "./recipe.type";
 import { CurrentUser, ValidateArgs } from "../decorators";
+import { RandomId } from "../decorators/random-id";
 import { ResolveTimeMiddleware } from "../middlewares";
 import { User } from "../user.type";
 
@@ -13,6 +14,12 @@ import { User } from "../user.type";
 export class RecipeResolver {
   private readonly items: Recipe[] = recipesData;
 
+  @Query(_returns => Recipe, { nullable: true })
+  async recipe(@RandomId("id") id: number) {
+    console.log(`Queried for recipe with id: ${id}`);
+    return this.items.find(item => item.id === id);
+  }
+
   @Query(_returns => [Recipe])
   @ValidateArgs(RecipesArgs)
   async recipes(

examples/middlewares-custom-decorators/recipe/recipe.type.ts

@@ -3,6 +3,9 @@ import { LogAccessMiddleware, NumberInterceptor } from "../middlewares";
 
 @ObjectType()
 export class Recipe {
+  @Field(_type => Int)
+  id!: number;
+
   @Field()
   title!: string;
 

examples/middlewares-custom-decorators/schema.graphql

@@ -4,12 +4,19 @@
 # -----------------------------------------------
 
 type Query {
+  recipe(
+    """
+    Accepts provided id or generates a random one.
+    """
+    id: Int
+  ): Recipe
   recipes(skip: Int! = 0, take: Int! = 10): [Recipe!]!
 }
 
 type Recipe {
   averageRating: Float
   description: String
+  id: Int!
   ratings: [Int!]!
   title: String!
 }