feat(model): add updateMethod option

Author: JoaoPedroAS51

Diff for: src/Model.js

@@ -52,6 +52,10 @@ export default class Model extends StaticModel {
     return this[this.primaryKey()]
   }
 
+  updateMethod() {
+    return 'PUT'
+  }
+
   custom(...args) {
 
     if (args.length === 0) {
@@ -403,7 +407,7 @@ export default class Model extends StaticModel {
   _update() {
     return this.request(
       this._reqConfig({
-        method: 'PUT',
+        method: this.updateMethod(),
         url: this.endpoint(),
         data: this
       })
@@ -429,7 +433,7 @@ export default class Model extends StaticModel {
   sync(params) {
     return this.request(
       this._reqConfig({
-        method: 'PUT',
+        method: this.updateMethod(),
         url: this.endpoint(),
         data: params
       })

Diff for: tests/model.test.js

@@ -383,6 +383,22 @@ describe('Model methods', () => {
     comment.save()
   })
 
+  test('save() method makes a PATCH request when method is set using `updateMethod`', async () => {
+    let post
+
+    axiosMock.onAny().reply((config) => {
+      expect(config.method).toEqual('patch')
+      expect(config.data).toEqual(JSON.stringify(post))
+      expect(config.url).toEqual('http://localhost/posts/1')
+
+      return [200, {}]
+    })
+
+    post = new Post({ id: 1, title: 'Cool!' })
+    post.updateMethod = () => 'PATCH'
+    await post.save()
+  })
+
   test('save() method makes a PATCH request when method is set using `config`', async () => {
     let post