feat: set default values on the request body (closes #127) (#128)

example/__tests__/PetsResource.spec.ts

@@ -1,7 +1,7 @@
-import request from 'supertest'
-import { SlushyFactory } from '../src/SlushyFactory'
 import { Slushy } from '@slushy/server'
+import request from 'supertest'
 import { Context } from '../src/Context'
+import { SlushyFactory } from '../src/SlushyFactory'
 import { testLoggerFactory } from './testLoggerFactory'
 
 describe('PetsResource', () => {

example/__tests__/Validation.spec.ts

@@ -41,6 +41,26 @@ describe('Validation', () => {
         })
     })
 
+    describe('body', () => {
+        describe('default values', () => {
+            it('should set the default value', async () => {
+                const response = await request(slushy.app)
+                    .post('/validation/body/set-defaults')
+                    .send({})
+                expect(response.status).toBe(200)
+                expect(response.body).toEqual({ default: 'default' })
+            })
+
+            it('should pass values without defaults', async () => {
+                const response = await request(slushy.app)
+                    .post('/validation/body/set-defaults')
+                    .send({ noDefault: 'noDefault' })
+                expect(response.status).toBe(200)
+                expect(response.body).toEqual({ default: 'default', noDefault: 'noDefault' })
+            })
+        })
+    })
+
     describe('path', () => {
         it('should accept a request if the parameter is correct', async () => {
             const response = await request(slushy.app).get('/validation/path/1/1')

example/pet.yaml

@@ -72,7 +72,34 @@ paths:
                 properties:
                   header: 
                     type: string
-
+  /validation/body/set-defaults:
+    post:
+      operationId: validationBodyDefaultValue
+      description: Test body default value setter
+      summary: Test body default value setter
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                default:
+                  type: string
+                  default: default
+                noDefault:
+                  type: string
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  default:
+                    type: string
+                  noDefault:
+                    type: string
   /validation/path/{num}/{str}:
     get:
       operationId: validationPath

example/src/ValidationResourceImpl.ts

@@ -1,6 +1,9 @@
 import { SlushyContext } from '@slushy/server'
 import { Context } from './Context'
 import {
+    ValidationBodyDefaultValueOK,
+    ValidationBodyDefaultValueParams,
+    ValidationBodyDefaultValueResponse,
     ValidationHeaderOK,
     ValidationHeaderParams,
     ValidationHeaderResponse,
@@ -14,6 +17,16 @@ import {
 } from './generated/resources/ValidationResource'
 
 export class ValidationResourceImpl implements ValidationResource<Context> {
+    public async validationBodyDefaultValue(
+        params: ValidationBodyDefaultValueParams,
+        _context: SlushyContext<Context>,
+    ): Promise<ValidationBodyDefaultValueResponse> {
+        return new ValidationBodyDefaultValueOK({
+            default: params.requestBody.default,
+            noDefault: params.requestBody.noDefault,
+        })
+    }
+
     public async validationQuery(
         params: ValidationQueryParams,
         _context: SlushyContext<Context>,

server/src/middleware/RequestValidatorMiddlewareFactory.ts

@@ -21,6 +21,7 @@ export class RequestValidatorMiddlewareFactory implements MiddlewareFactory {
     private readonly validator = new Ajv({
         allErrors: true,
         unknownFormats: 'ignore',
+        useDefaults: true,
     })
 
     public create(props: SlushyProps<any>, path?: string, operation?: PathHttpOperation): SlushyRequestHandler[] {