fix: handle Date when coverting to formData

before the fix it converted to empty objects

src/backend/adapters/record/base-record.ts

@@ -1,4 +1,3 @@
-import _ from 'lodash'
 import { flat } from '../../../utils/flat'
 import { ParamsType } from './params.type'
 import BaseResource from '../resource/base-resource'

src/frontend/hooks/use-record/record-to-form-data.spec.ts

@@ -31,4 +31,13 @@ describe('recordToFormData', function () {
 
     expect(recordToFormData(record).get(propertyKey)).to.equal(FORM_VALUE_EMPTY_ARRAY)
   })
+
+  it('does not convert date to empty object', async () => {
+    const date = new Date()
+    const record = await factory.build<RecordJSON>('RecordJSON', { params: {
+      [propertyKey]: date,
+    } })
+
+    expect(recordToFormData(record).get(propertyKey)).to.equal(date.toString())
+  })
 })

src/frontend/hooks/use-record/record-to-form-data.ts

@@ -4,6 +4,12 @@ export const FORM_VALUE_NULL = '__FORM_VALUE_NULL__'
 export const FORM_VALUE_EMPTY_OBJECT = '__FORM_VALUE_EMPTY_OBJECT__'
 export const FORM_VALUE_EMPTY_ARRAY = '__FORM_VALUE_EMPTY_ARRAY__'
 
+const isObjectOrArray = (value: any): boolean => (
+  typeof value === 'object'
+  && (value as object).constructor !== File
+  && !(value instanceof Date)
+)
+
 /**
  * Changes RecordJSON that it can be send as a FormData to the backend.
  *
@@ -19,14 +25,15 @@ export const FORM_VALUE_EMPTY_ARRAY = '__FORM_VALUE_EMPTY_ARRAY__'
 export default function recordToFormData(record: RecordJSON): FormData {
   const formData = new FormData()
 
+  // Assume that record.params are flatted
   Object.entries(record.params).forEach(([key, value]) => {
     // {@link updateRecord} does not change empty objects "{}" - so in order to prevent having
     // them changed to "[object Object]" we have to set them to empty strings.
     if (value === null) {
       return formData.set(key, FORM_VALUE_NULL)
     }
     // File objects has to go through because they are handled by FormData
-    if (typeof value === 'object' && (value as object).constructor !== File) {
+    if (isObjectOrArray(value)) {
       if (Array.isArray(value)) {
         return formData.set(key, FORM_VALUE_EMPTY_ARRAY)
       }

src/utils/flat/flat.types.ts

@@ -7,6 +7,7 @@
 export type FlattenValue = 'string' |
   'boolean' |
   'number' |
+  Date |
   null |
   [] |
   {} |