Introduce "Send Slack message" in application builder. (baserow#4239)

* Adding the builder workflow action for the new Slack send message service.

* Lint fix; tweaks

* Add the issue_origin

Author: picklepete

backend/src/baserow/contrib/builder/apps.py

@@ -286,6 +286,7 @@ def ready(self):
             NotificationWorkflowActionType,
             OpenPageWorkflowActionType,
             RefreshDataSourceWorkflowActionType,
+            SlackWriteMessageWorkflowActionType,
             UpdateRowWorkflowActionType,
         )
 
@@ -301,6 +302,9 @@ def ready(self):
         builder_workflow_action_type_registry.register(CoreHttpRequestActionType())
         builder_workflow_action_type_registry.register(CoreSMTPEmailActionType())
         builder_workflow_action_type_registry.register(AIAgentWorkflowActionType())
+        builder_workflow_action_type_registry.register(
+            SlackWriteMessageWorkflowActionType()
+        )
 
         from .elements.collection_field_types import (
             BooleanCollectionFieldType,

backend/src/baserow/contrib/builder/migrations/0067_slackwritemessageworkflowaction.py

@@ -0,0 +1,42 @@
+# Generated by Django 5.0.14 on 2025-11-13 11:57
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("builder", "0066_element_visibility_condition"),
+        ("core", "0107_twofactorauthprovidermodel_totpauthprovidermodel_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="SlackWriteMessageWorkflowAction",
+            fields=[
+                (
+                    "builderworkflowaction_ptr",
+                    models.OneToOneField(
+                        auto_created=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        parent_link=True,
+                        primary_key=True,
+                        serialize=False,
+                        to="builder.builderworkflowaction",
+                    ),
+                ),
+                (
+                    "service",
+                    models.ForeignKey(
+                        help_text="The service which this action is associated with.",
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="core.service",
+                    ),
+                ),
+            ],
+            options={
+                "abstract": False,
+            },
+            bases=("builder.builderworkflowaction",),
+        ),
+    ]

backend/src/baserow/contrib/builder/workflow_actions/models.py

@@ -125,3 +125,7 @@ class CoreSMTPEmailWorkflowAction(BuilderWorkflowServiceAction):
 
 class AIAgentWorkflowAction(BuilderWorkflowServiceAction):
     ...
+
+
+class SlackWriteMessageWorkflowAction(BuilderWorkflowServiceAction):
+    ...

backend/src/baserow/contrib/builder/workflow_actions/workflow_action_types.py

@@ -26,6 +26,7 @@
     NotificationWorkflowAction,
     OpenPageWorkflowAction,
     RefreshDataSourceWorkflowAction,
+    SlackWriteMessageWorkflowAction,
 )
 from baserow.contrib.builder.workflow_actions.registries import (
     BuilderWorkflowActionType,
@@ -40,6 +41,9 @@
     LocalBaserowDeleteRowServiceType,
     LocalBaserowUpsertRowServiceType,
 )
+from baserow.contrib.integrations.slack.service_types import (
+    SlackWriteMessageServiceType,
+)
 from baserow.core.db import specific_queryset
 from baserow.core.formula.field import BASEROW_FORMULA_VERSION_INITIAL
 from baserow.core.formula.serializers import FormulaSerializerField
@@ -493,3 +497,13 @@ class AIAgentWorkflowActionType(BuilderWorkflowServiceActionType):
     def get_pytest_params(self, pytest_data_fixture) -> Dict[str, int]:
         service = pytest_data_fixture.create_ai_agent_service()
         return {"service": service}
+
+
+class SlackWriteMessageWorkflowActionType(BuilderWorkflowServiceActionType):
+    type = "slack_write_message"
+    model_class = SlackWriteMessageWorkflowAction
+    service_type = SlackWriteMessageServiceType.type
+
+    def get_pytest_params(self, pytest_data_fixture) -> Dict[str, int]:
+        service = pytest_data_fixture.create_slack_write_message_service()
+        return {"service": service}

backend/src/baserow/contrib/integrations/slack/service_types.py

@@ -28,6 +28,7 @@ class SlackWriteMessageServiceType(ServiceType):
 
     allowed_fields = ["integration_id", "channel", "text"]
     serializer_field_names = ["integration_id", "channel", "text"]
+    public_serializer_field_names = ["integration_id", "channel", "text"]
     simple_formula_fields = ["text"]
 
     class SerializedDict(ServiceDict):
@@ -55,6 +56,12 @@ def serializer_field_overrides(self):
             ),
         }
 
+    @property
+    def public_serializer_field_overrides(self):
+        # When we're exposing this service type via a "public" serializer,
+        #  use the same overrides as usual.
+        return self.serializer_field_overrides
+
     def formulas_to_resolve(
         self, service: SlackWriteMessageService
     ) -> list[FormulaToResolve]:

backend/src/baserow/test_utils/fixtures/service.py

@@ -20,6 +20,7 @@
     LocalBaserowTableServiceSort,
     LocalBaserowUpsertRow,
 )
+from baserow.contrib.integrations.slack.models import SlackWriteMessageService
 from baserow.core.services.registries import service_type_registry
 
 
@@ -104,6 +105,9 @@ def create_core_smtp_email_service(self, **kwargs) -> CoreSMTPEmailService:
     def create_ai_agent_service(self, **kwargs):
         return self.create_service(AIAgentService, **kwargs)
 
+    def create_slack_write_message_service(self, **kwargs):
+        return self.create_service(SlackWriteMessageService, **kwargs)
+
     def create_core_iterator_service(self, **kwargs):
         return self.create_service(CoreIteratorService, **kwargs)
 

changelog/entries/unreleased/feature/4237_introduced_the_new_slack_send_message_workflow_action.json

@@ -0,0 +1,9 @@
+{
+    "type": "feature",
+    "message": "Introduced the new 'Slack send message' workflow action.",
+    "domain": "builder",
+    "issue_number": 4237,
+    "issue_origin": "github",
+    "bullet_points": [],
+    "created_at": "2025-11-13"
+}

web-frontend/modules/builder/components/event/Event.vue

@@ -34,6 +34,7 @@
             :key="workflowActionType.getType()"
             :value="workflowActionType.getType()"
             :icon="workflowActionType.icon"
+            :image="workflowActionType.image"
             type="primary"
             size="small"
             @click="addWorkflowAction(workflowActionType.getType())"

web-frontend/modules/builder/components/event/WorkflowAction.vue

@@ -1,7 +1,13 @@
 <template>
   <SidebarExpandable :force-expanded="expanded" @toggle="$emit('toggle')">
     <template #title>
-      <Icon :icon="workflowActionType.icon" />
+      <Icon v-if="workflowActionType.icon" :icon="workflowActionType.icon" />
+      <img
+        v-else-if="workflowActionType.image"
+        alt=""
+        class="workflow-action__image"
+        :src="workflowActionType.image"
+      />
       <span>{{ workflowActionType.label }}</span>
       <Icon
         v-if="errorMessage"

web-frontend/modules/builder/plugin.js

@@ -121,6 +121,7 @@ import {
   CoreHTTPRequestWorkflowActionType,
   CoreSMTPEmailWorkflowActionType,
   AIAgentWorkflowActionType,
+  SlackWriteMessageWorkflowActionType,
 } from '@baserow/modules/builder/workflowActionTypes'
 
 import {
@@ -389,6 +390,10 @@ export default (context) => {
     'workflowAction',
     new DeleteRowWorkflowActionType(context)
   )
+  app.$registry.register(
+    'workflowAction',
+    new SlackWriteMessageWorkflowActionType(context)
+  )
 
   app.$registry.register(
     'collectionField',