Add empty message for form actions (#12414)

<img width="503" alt="Capture d’écran 2025-06-02 à 15 55 36"
src="https://github.com/user-attachments/assets/9b3f60ae-7a13-45f8-aa87-ba32211e832f"
/>

packages/twenty-front/src/modules/object-record/record-field/form-types/components/FormFieldInputRowContainer.tsx

@@ -5,17 +5,18 @@ export const LINE_HEIGHT = 24;
 
 const StyledFormFieldInputRowContainer = styled.div<{
   multiline?: boolean;
+  maxHeight?: number;
 }>`
   display: flex;
   flex-direction: row;
   position: relative;
 
-  ${({ multiline }) =>
+  ${({ multiline, maxHeight }) =>
     multiline
       ? css`
           line-height: ${LINE_HEIGHT}px;
           min-height: ${3 * LINE_HEIGHT}px;
-          max-height: ${5 * LINE_HEIGHT}px;
+          max-height: ${maxHeight ?? 5 * LINE_HEIGHT}px;
         `
       : css`
           height: 32px;

packages/twenty-front/src/modules/workflow/workflow-steps/workflow-actions/form-action/components/WorkflowEditActionFormBuilder.tsx

@@ -8,6 +8,7 @@ import { WorkflowFormAction } from '@/workflow/types/Workflow';
 import { WorkflowStepBody } from '@/workflow/workflow-steps/components/WorkflowStepBody';
 import { WorkflowStepHeader } from '@/workflow/workflow-steps/components/WorkflowStepHeader';
 import { WorkflowEditActionFormFieldSettings } from '@/workflow/workflow-steps/workflow-actions/form-action/components/WorkflowEditActionFormFieldSettings';
+import { WorkflowFormEmptyMessage } from '@/workflow/workflow-steps/workflow-actions/form-action/components/WorkflowFormEmptyMessage';
 import { WorkflowFormActionField } from '@/workflow/workflow-steps/workflow-actions/form-action/types/WorkflowFormActionField';
 import { getDefaultFormFieldSettings } from '@/workflow/workflow-steps/workflow-actions/form-action/utils/getDefaultFormFieldSettings';
 import { useActionHeaderTypeOrThrow } from '@/workflow/workflow-steps/workflow-actions/hooks/useActionHeaderTypeOrThrow';
@@ -234,6 +235,9 @@ export const WorkflowEditActionFormBuilder = ({
         disabled={actionOptions.readonly}
       />
       <StyledWorkflowStepBody>
+        {formData.length === 0 && (
+          <WorkflowFormEmptyMessage data-testid="empty-form-message" />
+        )}
         <DraggableList
           onDragEnd={handleDragEnd}
           draggableItems={

packages/twenty-front/src/modules/workflow/workflow-steps/workflow-actions/form-action/components/WorkflowFormEmptyMessage.tsx

@@ -0,0 +1,66 @@
+import { FormFieldInputContainer } from '@/object-record/record-field/form-types/components/FormFieldInputContainer';
+import { FormFieldInputInnerContainer } from '@/object-record/record-field/form-types/components/FormFieldInputInnerContainer';
+import { FormFieldInputRowContainer } from '@/object-record/record-field/form-types/components/FormFieldInputRowContainer';
+import styled from '@emotion/styled';
+import { useLingui } from '@lingui/react/macro';
+
+const StyledMessageContainer = styled.div`
+  padding-bottom: ${({ theme }) => theme.spacing(4)};
+  padding-inline: ${({ theme }) => theme.spacing(7)};
+  padding-top: ${({ theme }) => theme.spacing(2)};
+`;
+
+const StyledMessageContentContainer = styled.div`
+  flex-direction: column;
+  color: ${({ theme }) => theme.font.color.secondary};
+  display: flex;
+  gap: ${({ theme }) => theme.spacing(4)};
+  width: 100%;
+  padding: ${({ theme }) => theme.spacing(4)};
+  line-height: normal;
+`;
+
+const StyledMessageTitle = styled.div`
+  color: ${({ theme }) => theme.font.color.primary};
+  font-weight: ${({ theme }) => theme.font.weight.medium};
+  line-height: 13px;
+`;
+
+const StyledMessageDescription = styled.div`
+  color: ${({ theme }) => theme.font.color.secondary};
+  font-weight: ${({ theme }) => theme.font.weight.regular};
+`;
+
+const StyledFieldContainer = styled.div`
+  align-items: center;
+  background: transparent;
+  border: none;
+  display: flex;
+  font-family: inherit;
+  width: 100%;
+`;
+
+export const WorkflowFormEmptyMessage = () => {
+  const { t } = useLingui();
+
+  return (
+    <StyledMessageContainer>
+      <FormFieldInputContainer>
+        <FormFieldInputRowContainer multiline maxHeight={124}>
+          <FormFieldInputInnerContainer hasRightElement={false}>
+            <StyledFieldContainer>
+              <StyledMessageContentContainer>
+                <StyledMessageTitle data-testid="empty-form-message-title">
+                  {t`Add inputs to your form`}
+                </StyledMessageTitle>
+                <StyledMessageDescription data-testid="empty-form-message-description">
+                  {t`Click on "Add Field" below to add the first input to your form. The form will pop up on the user's screen when the workflow is launched from a manual trigger. For other types of triggers, it will be displayed in the Workflow run record page.`}
+                </StyledMessageDescription>
+              </StyledMessageContentContainer>
+            </StyledFieldContainer>
+          </FormFieldInputInnerContainer>
+        </FormFieldInputRowContainer>
+      </FormFieldInputContainer>
+    </StyledMessageContainer>
+  );
+};

packages/twenty-front/src/modules/workflow/workflow-steps/workflow-actions/form-action/components/__stories__/WorkflowEditActionFormBuilder.stories.tsx

@@ -170,3 +170,29 @@ export const DisabledWithEmptyValues: Story = {
     expect(addFieldButton).not.toBeInTheDocument();
   },
 };
+
+export const EmptyForm: Story = {
+  args: {
+    actionOptions: {
+      onActionUpdate: fn(),
+    },
+    action: {
+      ...DEFAULT_ACTION,
+      settings: {
+        ...DEFAULT_ACTION.settings,
+        input: [],
+      },
+    },
+  },
+  play: async ({ canvasElement }) => {
+    const canvas = within(canvasElement);
+    const messageContainer = await canvas.findByTestId(
+      'empty-form-message-title',
+    );
+
+    expect(messageContainer).toBeVisible();
+
+    const addFieldButton = await canvas.findByText('Add Field');
+    expect(addFieldButton).toBeVisible();
+  },
+};

packages/twenty-front/src/modules/workflow/workflow-steps/workflow-actions/form-action/components/__stories__/WorkflowFormEmptyMessage.stories.tsx

@@ -0,0 +1,32 @@
+import type { Meta, StoryObj } from '@storybook/react';
+import { expect, within } from '@storybook/test';
+import { I18nFrontDecorator } from '~/testing/decorators/I18nFrontDecorator';
+import { WorkflowFormEmptyMessage } from '../WorkflowFormEmptyMessage';
+
+const meta: Meta<typeof WorkflowFormEmptyMessage> = {
+  title: 'Modules/Workflow/Actions/Form/WorkflowFormEmptyMessage',
+  component: WorkflowFormEmptyMessage,
+  parameters: {
+    layout: 'centered',
+  },
+  decorators: [I18nFrontDecorator],
+};
+
+export default meta;
+type Story = StoryObj<typeof WorkflowFormEmptyMessage>;
+
+export const Default: Story = {
+  args: {},
+  play: async ({ canvasElement }) => {
+    const canvas = within(canvasElement);
+    const messageTitleContainer = await canvas.findByTestId(
+      'empty-form-message-title',
+    );
+    const messageDescriptionContainer = await canvas.findByTestId(
+      'empty-form-message-description',
+    );
+
+    expect(messageTitleContainer).toBeVisible();
+    expect(messageDescriptionContainer).toBeVisible();
+  },
+};

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-step/workflow-version-step.workspace-service.ts

@@ -1,7 +1,6 @@
 import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 
-import { FieldMetadataType } from 'twenty-shared/types';
 import { isDefined, isValidUuid } from 'twenty-shared/utils';
 import { Repository } from 'typeorm';
 import { v4 } from 'uuid';
@@ -541,22 +540,7 @@ export class WorkflowVersionStepWorkspaceService {
           valid: false,
           settings: {
             ...BASE_STEP_DEFINITION,
-            input: [
-              {
-                id: v4(),
-                name: 'company',
-                label: 'Company',
-                placeholder: 'Select a company',
-                type: FieldMetadataType.TEXT,
-              },
-              {
-                id: v4(),
-                name: 'number',
-                label: 'Number',
-                placeholder: '1000',
-                type: FieldMetadataType.NUMBER,
-              },
-            ],
+            input: [],
           },
         };
       }