feat(associate): routes to associate objects with each other

src/associations/associate.js

@@ -0,0 +1,37 @@
+import joi from 'joi';
+import error from '../error';
+import { capitalize } from 'lodash/string';
+
+let prefix;
+
+export default (server, a, b, options) => {
+  prefix = options.prefix;
+
+  console.log(`${prefix}/associate/${a._singular}/{aid}/${b._singular}/{bid}`);
+  server.route({
+    method: 'GET',
+    path: `${prefix}/associate/${a._singular}/{aid}/${b._singular}/{bid}`,
+
+    @error
+    async handler(request, reply) {
+      let instanceb = await b.findOne({
+        where: {
+          id: request.params.bid
+        }
+      });
+
+      let instancea = await a.findOne({
+        where: {
+          id: request.params.aid
+        }
+      });
+
+      let fna = (instancea['add' + b.name] || instancea['set' + b.name]).bind(instancea);
+      let fnb = (instanceb['add' + a.name] || instanceb['set' + a.name]).bind(instanceb);
+      await fna(instanceb);
+      await fnb(instancea);
+
+      reply(instancea);
+    }
+  })
+}

src/associations/index.js

@@ -1,4 +1,5 @@
 import oneToOne from './one-to-one';
 import oneToMany from './one-to-many';
+import associate from './associate';
 
-export { oneToOne, oneToMany };
+export { oneToOne, oneToMany, associate };