fix(kitsu-core): build list queryparams (#781)

* fix(kitsu-core): build list queryparams

* remove backend-specific key formatting

Co-authored-by: James Harris <wopian@wopian.me>

Author: pedep

packages/kitsu-core/src/query/index.js

@@ -7,7 +7,8 @@
  * @private
  */
 function queryFormat (value, key) {
-  if (value !== null && typeof value === 'object') return query(value, key)
+  if (value !== null && Array.isArray(value)) return value.map(v => queryFormat(v, key)).join('&')
+  else if (value !== null && typeof value === 'object') return query(value, key)
   else return encodeURIComponent(key) + '=' + encodeURIComponent(value)
 }
 

packages/kitsu-core/src/query/index.spec.js

@@ -58,5 +58,23 @@ describe('kitsu-core', () => {
         }
       })).toEqual('fields%5Babc%5D%5Bdef%5D%5Bghi%5D%5Bjkl%5D=mno')
     })
+
+    it('builds list parameters', () => {
+      expect.assertions(1)
+      expect(query({
+        filter: {
+          id_in: [ 1, 2, 3 ]
+        }
+      })).toEqual('filter%5Bid_in%5D=1&filter%5Bid_in%5D=2&filter%5Bid_in%5D=3')
+    })
+
+    it('builds nested list parameters', () => {
+      expect.assertions(1)
+      expect(query({
+        filter: {
+          users: [ { id: 1, type: 'users' }, { id: 2, type: 'users' } ]
+        }
+      })).toEqual('filter%5Busers%5D%5Bid%5D=1&filter%5Busers%5D%5Btype%5D=users&filter%5Busers%5D%5Bid%5D=2&filter%5Busers%5D%5Btype%5D=users')
+    })
   })
 })