From 000bec3cf2e5367beb448bd6d6a6bd0bfcb86c08 Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Kaiser <jb@marmelab.com>
Date: Mon, 20 Nov 2023 11:15:09 +0100
Subject: [PATCH] Fix `<FileInput>` should display a validation errors right
 away when form mode is 'onChange'

---
 .../src/input/FileInput.spec.tsx              | 102 +++++++++++++++++-
 .../ra-ui-materialui/src/input/FileInput.tsx  |   6 +-
 2 files changed, 106 insertions(+), 2 deletions(-)

diff --git a/packages/ra-ui-materialui/src/input/FileInput.spec.tsx b/packages/ra-ui-materialui/src/input/FileInput.spec.tsx
index 7a384e0fea8..8282038e1fb 100644
--- a/packages/ra-ui-materialui/src/input/FileInput.spec.tsx
+++ b/packages/ra-ui-materialui/src/input/FileInput.spec.tsx
@@ -6,12 +6,13 @@ import {
     waitFor,
     waitForElementToBeRemoved,
 } from '@testing-library/react';
-import { testDataProvider } from 'ra-core';
+import { required, testDataProvider } from 'ra-core';
 
 import { AdminContext } from '../AdminContext';
 import { SimpleForm, Toolbar } from '../form';
 import { FileField, ImageField } from '../field';
 import { FileInput } from './FileInput';
+import { TextInput } from './TextInput';
 import { SaveButton } from '../button';
 
 describe('<FileInput />', () => {
@@ -469,6 +470,105 @@ describe('<FileInput />', () => {
         test(<CustomLabel />, 'Custom label in component');
     });
 
+    describe('Validation', () => {
+        it('should display a validation error if the value is required and there is no file', async () => {
+            const onSubmit = jest.fn();
+
+            render(
+                <AdminContext dataProvider={testDataProvider()}>
+                    <SimpleForm onSubmit={onSubmit}>
+                        <FileInput
+                            {...defaultPropsMultiple}
+                            validate={required()}
+                        >
+                            <FileField source="src" title="title" />
+                        </FileInput>
+                        <TextInput source="title" resource="posts" />
+                    </SimpleForm>
+                </AdminContext>
+            );
+
+            fireEvent.change(
+                await screen.findByLabelText('resources.posts.fields.title'),
+                {
+                    target: { value: 'Hello world!' },
+                }
+            );
+            fireEvent.click(screen.getByLabelText('ra.action.save'));
+
+            await screen.findByText('ra.validation.required');
+            expect(onSubmit).not.toHaveBeenCalled();
+        });
+
+        it('should display a validation error if the value is required and the file is removed', async () => {
+            const onSubmit = jest.fn();
+
+            render(
+                <AdminContext dataProvider={testDataProvider()}>
+                    <SimpleForm
+                        onSubmit={onSubmit}
+                        defaultValues={{
+                            images: [
+                                {
+                                    src: 'test.png',
+                                    title: 'cats',
+                                },
+                            ],
+                        }}
+                    >
+                        <FileInput
+                            {...defaultPropsMultiple}
+                            validate={required()}
+                        >
+                            <FileField source="src" title="title" />
+                        </FileInput>
+                    </SimpleForm>
+                </AdminContext>
+            );
+
+            expect(screen.getByTitle('cats')).not.toBeNull();
+            fireEvent.click(screen.getAllByLabelText('ra.action.delete')[0]);
+            fireEvent.click(screen.getByLabelText('ra.action.save'));
+
+            await screen.findByText('ra.validation.required');
+            expect(onSubmit).not.toHaveBeenCalled();
+        });
+
+        it('should display a validation error right away when form mode is onChange', async () => {
+            const onSubmit = jest.fn();
+
+            render(
+                <AdminContext dataProvider={testDataProvider()}>
+                    <SimpleForm
+                        onSubmit={onSubmit}
+                        defaultValues={{
+                            images: [
+                                {
+                                    src: 'test.png',
+                                    title: 'cats',
+                                },
+                            ],
+                        }}
+                        mode="onChange"
+                    >
+                        <FileInput
+                            {...defaultPropsMultiple}
+                            validate={required()}
+                        >
+                            <FileField source="src" title="title" />
+                        </FileInput>
+                    </SimpleForm>
+                </AdminContext>
+            );
+
+            expect(screen.getByTitle('cats')).not.toBeNull();
+            fireEvent.click(screen.getAllByLabelText('ra.action.delete')[0]);
+
+            await screen.findByText('ra.validation.required');
+            expect(onSubmit).not.toHaveBeenCalled();
+        });
+    });
+
     describe('Image Preview', () => {
         it('should display file preview using child as preview component', () => {
             render(
diff --git a/packages/ra-ui-materialui/src/input/FileInput.tsx b/packages/ra-ui-materialui/src/input/FileInput.tsx
index 16b74d4b932..100c2be0bac 100644
--- a/packages/ra-ui-materialui/src/input/FileInput.tsx
+++ b/packages/ra-ui-materialui/src/input/FileInput.tsx
@@ -83,7 +83,7 @@ export const FileInput = (props: FileInputProps) => {
 
     const {
         id,
-        field: { onChange, value },
+        field: { onChange, onBlur, value },
         fieldState,
         formState: { isSubmitted },
         isRequired,
@@ -102,8 +102,10 @@ export const FileInput = (props: FileInputProps) => {
 
         if (multiple) {
             onChange(updatedFiles);
+            onBlur();
         } else {
             onChange(updatedFiles[0]);
+            onBlur();
         }
 
         if (onDropProp) {
@@ -124,8 +126,10 @@ export const FileInput = (props: FileInputProps) => {
                 stateFile => !shallowEqual(stateFile, file)
             );
             onChange(filteredFiles as any);
+            onBlur();
         } else {
             onChange(null);
+            onBlur();
         }
 
         if (onRemoveProp) {