fix: do not allow removal of last table view (#1366)

Closes #1358

front/src/modules/ui/table/options/components/TableViewsDropdownButton.tsx

@@ -31,6 +31,7 @@ import { usePreviousHotkeyScope } from '@/ui/utilities/hotkey/hooks/usePreviousH
 import { useContextScopeId } from '@/ui/utilities/recoil-scope/hooks/useContextScopeId';
 import { useRecoilScopedState } from '@/ui/utilities/recoil-scope/hooks/useRecoilScopedState';
 import { useRecoilScopedValue } from '@/ui/utilities/recoil-scope/hooks/useRecoilScopedValue';
+import { assertNotNull } from '~/utils/assert';
 
 import { TableRecoilScopeContext } from '../../states/recoil-scope-contexts/TableRecoilScopeContext';
 import { savedTableColumnsScopedState } from '../../states/savedTableColumnsScopedState';
@@ -184,12 +185,16 @@ export const TableViewsDropdownButton = ({
                 onClick={(event) => handleEditViewButtonClick(event, view.id)}
                 icon={<IconPencil size={theme.icon.size.sm} />}
               />,
-              <IconButton
+              views.length > 1 ? (
-                key="delete"
+                <IconButton
-                onClick={(event) => handleDeleteViewButtonClick(event, view.id)}
+                  key="delete"
-                icon={<IconTrash size={theme.icon.size.sm} />}
+                  onClick={(event) =>
-              />,
+                    handleDeleteViewButtonClick(event, view.id)
-            ]}
+                  }
+                  icon={<IconTrash size={theme.icon.size.sm} />}
+                />
+              ) : null,
+            ].filter(assertNotNull)}
             onClick={() => handleViewSelect(view.id)}
           >
             <IconList size={theme.icon.size.md} />

server/src/core/view/resolvers/view.resolver.ts

@@ -1,4 +1,8 @@
-import { UseGuards } from '@nestjs/common';
+import {
+  BadRequestException,
+  ForbiddenException,
+  UseGuards,
+} from '@nestjs/common';
 import { Args, Mutation, Query, Resolver } from '@nestjs/graphql';
 
 import { accessibleBy } from '@casl/prisma';
@@ -94,7 +98,35 @@ export class ViewResolver {
   @CheckAbilities(DeleteViewAbilityHandler)
   async deleteManyView(
     @Args() args: DeleteManyViewArgs,
+    @AuthWorkspace() workspace: Workspace,
   ): Promise<AffectedRows> {
+    const viewsToDelete = await this.viewService.findMany({
+      where: args.where,
+    });
+
+    if (!viewsToDelete.length) return { count: 0 };
+
+    const { objectId } = viewsToDelete[0];
+
+    if (viewsToDelete.some((view) => view.objectId !== objectId)) {
+      throw new BadRequestException(
+        `Views must have the same objectId '${objectId}'`,
+      );
+    }
+
+    const viewsNb = await this.viewService.count({
+      where: {
+        objectId: { equals: objectId },
+        workspaceId: { equals: workspace.id },
+      },
+    });
+
+    if (viewsNb - viewsToDelete.length <= 0) {
+      throw new ForbiddenException(
+        `Deleting last '${objectId}' view is not allowed`,
+      );
+    }
+
     return this.viewService.deleteMany({
       where: args.where,
     });