Support writeOnly + required combination #149 (#756)

Author: pdhau

Diff for: src/middlewares/parsers/schema.preprocessor.ts

@@ -287,6 +287,7 @@ export class SchemaPreprocessor {
         // This null check should no longer be necessary
         this.handleSerDes(pschema, nschema, options);
         this.handleReadonly(pschema, nschema, options);
+        this.handleWriteonly(pschema, nschema, options);
         this.processDiscriminator(pschema, nschema, options);
         this.removeExamples(pschema, nschema, options)
       }
@@ -479,6 +480,27 @@ export class SchemaPreprocessor {
     }
   }
 
+  private handleWriteonly(
+    parent: OpenAPIV3.SchemaObject,
+    schema: OpenAPIV3.SchemaObject,
+    opts,
+  ) {
+    if (opts.kind === 'req') return;
+
+    const required = parent?.required ?? [];
+    const prop = opts?.path?.[opts?.path?.length - 1];
+    const index = required.indexOf(prop);
+    if (schema.writeOnly && index > -1) {
+      // remove required if writeOnly
+      parent.required = required
+        .slice(0, index)
+        .concat(required.slice(index + 1));
+      if (parent.required.length === 0) {
+        delete parent.required;
+      }
+    }
+  }
+
   /**
    * extract all requestBodies' schemas from an operation
    * @param op

Diff for: test/resources/write.only.yaml

@@ -95,6 +95,8 @@ components:
     # TODO add nested test
     ProductNested:
       type: object
+      required:
+        - "password"
       properties:
         id:
           type: string
@@ -117,9 +119,14 @@ components:
           type: array
           items:
             $ref: '#/components/schemas/Review'
+        password:
+          type: string
+          writeOnly: true
 
     Review:
       type: object
+      required:
+        - "review_password"
       properties:
         id:
           type: integer
@@ -132,3 +139,6 @@ components:
           writeOnly: true
         rating:
           type: integer
+        review_password:
+          type: string
+          writeOnly: true

Diff for: test/write.only.spec.ts

@@ -86,6 +86,7 @@ describe(packageJson.name, () => {
         name: 'some name',
         role: 'admin',
         price: 10.99,
+        password: 'password_value'
       })
       .expect(200));
 
@@ -96,9 +97,11 @@ describe(packageJson.name, () => {
       .send({
         name: 'some name',
         price: 10.99,
+        password: 'password_value',
         reviews: [
           {
             rating: 5,
+            review_password: 'review_password_value'
           },
         ],
       })