Add ability to override available routes for a <Resource>

docs/Resource.md

@@ -226,6 +226,40 @@ For instance, to change the default representation of "users" records to render
 - a function (e.g. `(record) => record.title`) to specify a custom string representation
 - a React component (e.g. `<MyCustomRecordRepresentation />`). In such components, use [`useRecordContext`](./useRecordContext.md) to access the record.
 
+## `hasCreate`, `hasEdit`, `hasShow`
+
+Some components, like [`<CreateDialog>`](./CreateDialog.md), [`<EditDialog>`](./EditDialog.md) or [`<ShowDialog>`](./ShowDialog.md) need to declare the CRUD components outside of the `<Resource>` component. In such cases, you can use the `hasCreate`, `hasEdit` and `hasShow` props to tell react-admin which CRUD components are available for a given resource.
+
+This is useful, for instance, to have the `<ReferenceField>` component display a link to the edit or show view of the referenced record.
+
+```jsx
+// in src/App.js
+import { Admin, Resource } from 'react-admin';
+import { dataProvider } from './dataProvider';
+
+import { PostList } from './posts';
+import { CommentEdit } from './commentEdit';
+
+const App = () => (
+    <Admin dataProvider={dataProvider}>
+        <Resource name="posts" list={PostList} hasEdit />
+        <Resource name="comment" edit={CommentEdit} />
+    </Admin>
+);
+
+// in src/commentEdit.js
+import { Edit, SimpleForm, ReferenceField } from 'react-admin';
+
+const CommentEdit = () => (
+    <Edit>
+        <SimpleForm>
+            {/* renders a link to the edit view only because `hasEdit` has been set on `<Resource>` */}
+            <ReferenceField source="post_id" reference="posts" />
+        </SimpleForm>
+    </Edit>
+);
+```
+
 ## Resource Context
 
 `<Resource>` also creates a `ResourceContext`, that gives access to the current resource name to all descendants of the main page components (`list`, `create`, `edit`, `show`). 

packages/ra-core/src/core/Resource.tsx

@@ -52,13 +52,16 @@ Resource.registerResource = ({
     options,
     show,
     recordRepresentation,
+    hasCreate,
+    hasEdit,
+    hasShow,
 }: ResourceProps) => ({
     name,
     options,
     hasList: !!list,
-    hasCreate: !!create,
-    hasEdit: !!edit,
-    hasShow: !!show,
+    hasCreate: !!create || !!hasCreate,
+    hasEdit: !!edit || !!hasEdit,
+    hasShow: !!show || !!hasShow,
     icon,
     recordRepresentation,
 });

packages/ra-core/src/core/useConfigureAdminRouterFromChildren.spec.tsx

@@ -219,6 +219,30 @@ const TestedComponentWithOnlyLazyCustomRoutes = ({ history }) => {
     );
 };
 
+const TestedComponentWithForcedRoutes = () => {
+    const history = createMemoryHistory();
+
+    return (
+        <CoreAdminContext history={history}>
+            <CoreAdminRoutes
+                layout={MyLayout}
+                catchAll={CatchAll}
+                loading={Loading}
+            >
+                <Resource
+                    name="posts"
+                    list={<div />}
+                    hasCreate
+                    hasEdit
+                    hasShow
+                />
+                <Resource name="comments" list={<div />} />
+                {() => [<Resource name="user" list={<div />} hasEdit />]}
+            </CoreAdminRoutes>
+        </CoreAdminContext>
+    );
+};
+
 const expectResource = (resource: string) =>
     expect(screen.queryByText(`"name":"${resource}"`, { exact: false }));
 
@@ -324,4 +348,21 @@ describe('useConfigureAdminRouterFromChildren', () => {
         history.push('/foo');
         expect(screen.queryByText('Foo')).not.toBeNull();
     });
+    it('should support forcing hasEdit hasCreate or hasShow', async () => {
+        render(<TestedComponentWithForcedRoutes />);
+        await waitFor(() => expect(screen.queryByText('Loading')).toBeNull());
+
+        expectResourceView('posts', 'list').not.toBeNull();
+        expectResourceView('posts', 'create').not.toBeNull();
+        expectResourceView('posts', 'edit').not.toBeNull();
+        expectResourceView('posts', 'show').not.toBeNull();
+        expectResourceView('comments', 'list').not.toBeNull();
+        expectResourceView('comments', 'create').toBeNull();
+        expectResourceView('comments', 'edit').toBeNull();
+        expectResourceView('comments', 'show').toBeNull();
+        expectResourceView('user', 'list').not.toBeNull();
+        expectResourceView('user', 'create').toBeNull();
+        expectResourceView('user', 'edit').not.toBeNull();
+        expectResourceView('user', 'show').toBeNull();
+    });
 });

packages/ra-core/src/types.ts

@@ -346,6 +346,9 @@ export interface ResourceProps {
     create?: ComponentType<any> | ReactElement;
     edit?: ComponentType<any> | ReactElement;
     show?: ComponentType<any> | ReactElement;
+    hasCreate?: boolean;
+    hasEdit?: boolean;
+    hasShow?: boolean;
     icon?: ComponentType<any>;
     recordRepresentation?: ReactElement | RecordToStringFunction | string;
     options?: ResourceOptions;