(fix) #415 Cannot read property 'push' of undefined bug

src/middlewares/parsers/request.schema.preprocessor.ts

@@ -57,16 +57,17 @@ export class RequestSchemaPreprocessor {
 
     if (parameters.length === 0) return;
 
-    const v = pathItem[pathItemKey];
+    let v = pathItem[pathItemKey];
     if (v === parameters) return;
     const ref = v?.parameters?.$ref;
 
-    const operationParameters = <
-      Array<OpenAPIV3.ParameterObject | OpenAPIV3.ReferenceObject>
-    >(ref ? this.ajv.getSchema(ref)?.schema : v.parameters);
+    const op = ref && this.ajv.getSchema(ref)?.schema;
+    if (op)
+      v = op;
+    v.parameters = v.parameters || [];
 
     for (const param of parameters) {
-      operationParameters.push(param);
+      v.parameters.push(param);
     }
   }
 

test/path.params.spec.ts

@@ -17,7 +17,7 @@ describe('path params', () => {
       },
       3005,
       (app) => {
-        app.get(`${app.basePath}/users/:id?`, (req, res) => {
+        app.get([`${app.basePath}/users/:id?`, `${app.basePath}/users_alt/:id?`], (req, res) => {
           res.json({
             id: req.params.id,
           });
@@ -51,14 +51,22 @@ describe('path params', () => {
     app.server.close();
   });
 
-  it('should url decode path parameters', async () =>
+  it('should url decode path parameters (type level)', async () =>
     request(app)
       .get(`${app.basePath}/users/c%20dimascio`)
       .expect(200)
       .then((r) => {
         expect(r.body.id).to.equal('c dimascio');
       }));
 
+  it('should url decode path parameters (path level)', async () =>
+      request(app)
+        .get(`${app.basePath}/users_alt/c%20dimascio`)
+        .expect(200)
+        .then((r) => {
+          expect(r.body.id).to.equal('c dimascio');
+        }));
+
   it('should handle path parameter with style=simple', async () =>
     request(app)
       .get(`${app.basePath}/multi_users/aa,bb,cc`)

test/resources/path.params.yaml

@@ -20,6 +20,21 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/User"
+  /users_alt/{id}:
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+    get:
+      responses:
+        200:
+          description: ""
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/User"
   /multi_users/{ids}:
     get:
       summary: Deletes Features given a number of uuids.