Merge remote-tracking branch 'upstream/master'

Author: marcelorl

docs/globals.html

@@ -96,7 +96,7 @@ <h3><span class="tsd-flag ts-flagConst">Const</span> extract</h3>
 						<li class="tsd-description">
 							<aside class="tsd-sources">
 								<ul>
-									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6c4b8b6/index.ts#L91">index.ts:91</a></li>
+									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6f594dd/index.ts#L104">index.ts:104</a></li>
 								</ul>
 							</aside>
 							<div class="tsd-comment tsd-typography">
@@ -130,7 +130,7 @@ <h3><span class="tsd-flag ts-flagConst">Const</span> parse</h3>
 						<li class="tsd-description">
 							<aside class="tsd-sources">
 								<ul>
-									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6c4b8b6/index.ts#L44">index.ts:44</a></li>
+									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6f594dd/index.ts#L44">index.ts:44</a></li>
 								</ul>
 							</aside>
 							<div class="tsd-comment tsd-typography">
@@ -164,7 +164,7 @@ <h3><span class="tsd-flag ts-flagConst">Const</span> stringify</h3>
 						<li class="tsd-description">
 							<aside class="tsd-sources">
 								<ul>
-									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6c4b8b6/index.ts#L12">index.ts:12</a></li>
+									<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6f594dd/index.ts#L12">index.ts:12</a></li>
 								</ul>
 							</aside>
 							<div class="tsd-comment tsd-typography">

docs/interfaces/options.html

@@ -95,7 +95,7 @@ <h3>prefix</h3>
 					<div class="tsd-signature tsd-kind-icon">prefix<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div>
 					<aside class="tsd-sources">
 						<ul>
-							<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6c4b8b6/index.ts#L2">index.ts:2</a></li>
+							<li>Defined in <a href="https://github.com/marcelorl/query-stringifier/blob/6f594dd/index.ts#L2">index.ts:2</a></li>
 						</ul>
 					</aside>
 				</section>

index.ts

@@ -73,10 +73,23 @@ export const parse = (queryStr: string): object => {
                     obj[key][indexOfArray] = value;
                 } else {
                     obj[key] = [value];
-                }
+                }   
             }
         } else {
-            obj[key] = value;
+            // Check if the key is already in the object 
+            if (Object.keys(obj).indexOf(key) > -1) {
+                if (Array.isArray(obj[key])) {
+                    obj[key].push(value); 
+                } else {
+                    let newArray: string[] = [];
+                    newArray.push(obj[key]); 
+                    newArray.push(value);
+                    obj[key] = newArray; 
+                }
+
+            } else {
+                obj[key] = value;
+            }
         }
     });
 

test/index.spec.ts

@@ -64,6 +64,14 @@ describe('query-stringifier', () => {
             expect(parsed).to.have.keys(['arr']);
             expect(parsed).to.deep.equal({ arr: ['2', '3', '1'] });
         });
+
+        it('converts query string with duplicate keys', () => {
+            const parsed = qs.parse('itemIds=1&itemIds=2');
+
+            expect(parsed).to.be.an('object');
+            expect(parsed).to.have.keys(['itemIds']);
+            expect(parsed).to.deep.equal({ itemIds: ['1', '2'] });
+        });
     });
 
     describe('#extract', () => {