allow deletion of model

packages/server/middleware/controllers/model.js

@@ -61,5 +61,9 @@ exports.update = async function(ctx) {
 
 exports.destroy = async function(ctx) {
   const db = couchdb.db.use(ctx.params.instanceId)
-  ctx.body = await db.destroy(ctx.params.modelId, ctx.params.rev);
+  const model = await db.destroy(ctx.params.modelId, ctx.params.revId);
+  ctx.body = {
+    message: `Model ${model.id} deleted.`,
+    status: 200
+  }
 }

packages/server/middleware/routes/neo/model.js

@@ -7,7 +7,7 @@ router
   .get("/api/:instanceId/models", controller.fetch)
   .post("/api/:instanceId/models", controller.create)
   // .patch("/api/:instanceId/models", controller.update)
-  // .delete("/api/:instanceId/models/:modelId", controller.delete)
+  .delete("/api/:instanceId/models/:modelId/:revId", controller.destroy);
 
 
 module.exports = router;

packages/server/middleware/routes/neo/tests/couchTestUtils.js

@@ -16,8 +16,11 @@ exports.createModel = async instanceId => {
         }
     ]
   }
-  await couchdb.db.use(instanceId).insert(model);
+  const response = await couchdb.db.use(instanceId).insert(model);
-  return model;
+  return {
+    ...response,
+    ...model
+  };
 } 
 
 exports.createClientDatabase = async () => {

packages/server/middleware/routes/neo/tests/model.spec.js

@@ -80,4 +80,29 @@ describe("/models", () => {
         });
       })
     });
+
+  describe("destroy", () => {
+    let testModel;
+
+    beforeEach(async () => {
+      await createInstanceDatabase(TEST_INSTANCE_ID);
+      testModel = await createModel(TEST_INSTANCE_ID);
+    });
+
+    afterEach(async () => {
+      await destroyDatabase(TEST_INSTANCE_ID);
+    });
+
+    it("returns all the models for that instance in the response body", done => {
+      request
+        .delete(`/api/${TEST_INSTANCE_ID}/models/${testModel.id}/${testModel.rev}`)
+        .set("Accept", "application/json")
+        .expect('Content-Type', /json/)
+        .expect(200)
+        .end(async (_, res) => {
+            expect(res.body.message).toEqual(`Model ${testModel.id} deleted.`);            
+            done();
+        });
+      })
+    });
 });