Fix: don't build CRUD routes until ready

Previously, we were building the crud routes before we had run through
the association logic. This meant that routes could get created without
a complete list of associations available to it. This is slightly less
performant b/c we need to run through two loops, but ensures that the
full association data is available to all routes.

src/index.js

@@ -36,7 +36,6 @@ const register = (server, options = {}, next) => {
     // Join tables
     if (model.options.name.singular !== model.name) continue;
 
-    crud(server, model, options);
 
     for (const key of Object.keys(model.associations)) {
       const association = model.associations[key];
@@ -92,6 +91,13 @@ const register = (server, options = {}, next) => {
     }
   }
 
+  // build the methods for each model now that we've defined all the
+  // associations
+  Object.keys(models).forEach((modelName) => {
+    const model = models[modelName];
+    crud(server, model, options);
+  });
+
   next();
 };