From f888b2e4362929680ecd0c7a3727b7d19fe4b80f Mon Sep 17 00:00:00 2001
From: Simon Scherzinger <scherzinger@entrecode.de>
Date: Fri, 2 Feb 2018 15:22:41 +0100
Subject: [PATCH] fix: create relation with additional template param

---
 src/Core.ts               | 6 +++++-
 src/helper.ts             | 2 +-
 src/resources/Resource.ts | 6 +++++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/Core.ts b/src/Core.ts
index 06c3b119..1eba80b3 100644
--- a/src/Core.ts
+++ b/src/Core.ts
@@ -368,7 +368,11 @@ export default class Core {
     .then(link => validator.validate(resource, `${link.profile}${this[relationsSymbol][relation].createTemplateModifier}`))
     .then(() => this.follow(this[relationsSymbol][relation].relation))
     .then(request => {
-      request.withTemplateParameters({});
+      if (this[relationsSymbol][relation].additionalTemplateParam) {
+        request.withTemplateParameters(optionsToQuery({
+          [this[relationsSymbol][relation].additionalTemplateParam]: this[this[relationsSymbol][relation].additionalTemplateParam],
+        }));
+      }
       return post(this[environmentSymbol], request, resource)
     })
     .then(([c, traversal]) =>
diff --git a/src/helper.ts b/src/helper.ts
index 977fc23d..c941b5ae 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -444,7 +444,7 @@ const modifier = {
  * @param {string?} templateURL optional templateURL for validating inputs
  * @returns {object} translated querystring object
  */
-export function optionsToQuery(options: filterOptions, templateURL: string): any {
+export function optionsToQuery(options: filterOptions, templateURL?: string): any {
   const out: any = {};
 
   if (options) {
diff --git a/src/resources/Resource.ts b/src/resources/Resource.ts
index 439e4c00..ab9f06b0 100644
--- a/src/resources/Resource.ts
+++ b/src/resources/Resource.ts
@@ -139,7 +139,11 @@ class Resource {
     .then(link => validator.validate(resource, `${link.profile}${this[relationsSymbol][relation].createTemplateModifier}`))
     .then(() => this.newRequest().follow(this[relationsSymbol][relation].relation))
     .then(request => {
-      request.withTemplateParameters({});
+      if (this[relationsSymbol][relation].additionalTemplateParam) {
+        request.withTemplateParameters(optionsToQuery({
+          [this[relationsSymbol][relation].additionalTemplateParam]: this[this[relationsSymbol][relation].additionalTemplateParam],
+        }));
+      }
       return post(this[environmentSymbol], request, resource)
     })
     .then(([c, traversal]) =>