From 44a1d8f569db23a7fc826c1a9094e4e041cc51da Mon Sep 17 00:00:00 2001
From: fzaninotto <fzaninotto@gmail.com>
Date: Sun, 6 Dec 2020 22:39:23 +0100
Subject: [PATCH] Fix ra-data-simple-rest delete method fails because of bad
 header

Supersedes #5627
Refs #5568
---
 packages/ra-data-simple-rest/src/index.spec.ts | 12 ++++++------
 packages/ra-data-simple-rest/src/index.ts      |  8 ++++----
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/packages/ra-data-simple-rest/src/index.spec.ts b/packages/ra-data-simple-rest/src/index.spec.ts
index 49e0175f832..f60f96eba4c 100644
--- a/packages/ra-data-simple-rest/src/index.spec.ts
+++ b/packages/ra-data-simple-rest/src/index.spec.ts
@@ -83,9 +83,9 @@ describe('Data Simple REST Client', () => {
                 'http://localhost:3000/posts/1',
                 {
                     method: 'DELETE',
-                    headers: {
+                    headers: new Headers({
                         'Content-Type': 'text/plain',
-                    },
+                    }),
                 }
             );
         });
@@ -104,9 +104,9 @@ describe('Data Simple REST Client', () => {
                 'http://localhost:3000/posts/1',
                 {
                     method: 'DELETE',
-                    headers: {
+                    headers: new Headers({
                         'Content-Type': 'text/plain',
-                    },
+                    }),
                 }
             );
 
@@ -114,9 +114,9 @@ describe('Data Simple REST Client', () => {
                 'http://localhost:3000/posts/2',
                 {
                     method: 'DELETE',
-                    headers: {
+                    headers: new Headers({
                         'Content-Type': 'text/plain',
-                    },
+                    }),
                 }
             );
         });
diff --git a/packages/ra-data-simple-rest/src/index.ts b/packages/ra-data-simple-rest/src/index.ts
index 8157be55ec4..a9e1c4cd286 100644
--- a/packages/ra-data-simple-rest/src/index.ts
+++ b/packages/ra-data-simple-rest/src/index.ts
@@ -166,9 +166,9 @@ export default (
     delete: (resource, params) =>
         httpClient(`${apiUrl}/${resource}/${params.id}`, {
             method: 'DELETE',
-            headers: {
+            headers: new Headers({
                 'Content-Type': 'text/plain',
-            },
+            }),
         }).then(({ json }) => ({ data: json })),
 
     // simple-rest doesn't handle filters on DELETE route, so we fallback to calling DELETE n times instead
@@ -177,9 +177,9 @@ export default (
             params.ids.map(id =>
                 httpClient(`${apiUrl}/${resource}/${id}`, {
                     method: 'DELETE',
-                    headers: {
+                    headers: new Headers({
                         'Content-Type': 'text/plain',
-                    },
+                    }),
                 })
             )
         ).then(responses => ({