feat: add Organization model with tree structure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

offer_backend/apps/organizations/migrations/0001_initial.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.2.20 on 2026-03-24 09:34
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Organization',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100, verbose_name='公司名称')),
+                ('logo', models.ImageField(blank=True, null=True, upload_to='org_logos/')),
+                ('description', models.TextField(blank=True, verbose_name='公司简介')),
+                ('email', models.EmailField(blank=True, max_length=254, verbose_name='联系邮箱')),
+                ('is_active', models.BooleanField(default=True)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('parent', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='children', to='organizations.organization', verbose_name='上级公司')),
+            ],
+            options={
+                'verbose_name': '组织架构',
+                'verbose_name_plural': '组织架构',
+            },
+        ),
+    ]

offer_backend/apps/organizations/models.py

@@ -2,12 +2,23 @@ from django.db import models
 
 
 class Organization(models.Model):
-    name = models.CharField(max_length=255)
+    name = models.CharField(max_length=100, verbose_name='公司名称')
+    parent = models.ForeignKey(
+        'self', null=True, blank=True,
+        on_delete=models.SET_NULL,
+        related_name='children',
+        verbose_name='上级公司'
+    )
+    logo = models.ImageField(upload_to='org_logos/', null=True, blank=True)
+    description = models.TextField(blank=True, verbose_name='公司简介')
+    email = models.EmailField(blank=True, verbose_name='联系邮箱')
+    is_active = models.BooleanField(default=True)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     class Meta:
         app_label = 'organizations'
-        verbose_name = '组织'
-        verbose_name_plural = '组织'
+        verbose_name = '组织架构'
+        verbose_name_plural = '组织架构'
 
     def __str__(self):
         return self.name

offer_backend/apps/organizations/serializers.py

@@ -0,0 +1,22 @@
+from rest_framework import serializers
+from .models import Organization
+
+
+class OrganizationSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Organization
+        fields = ['id', 'name', 'parent', 'logo', 'description', 'email', 'is_active']
+
+
+class OrganizationTreeSerializer(serializers.ModelSerializer):
+    """带子公司列表，用于门户展示"""
+    children = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Organization
+        fields = ['id', 'name', 'logo', 'description', 'email', 'children']
+
+    def get_children(self, obj):
+        return OrganizationSerializer(
+            obj.children.filter(is_active=True), many=True
+        ).data

offer_backend/apps/organizations/tests/test_organizations.py

@@ -0,0 +1,23 @@
+import pytest
+from apps.organizations.models import Organization
+
+
+@pytest.mark.django_db
+class TestOrganizationModel:
+    def test_create_group(self):
+        org = Organization.objects.create(name='示例集团', email='group@example.com')
+        assert org.parent is None
+        assert org.is_active is True
+
+    def test_create_subsidiary(self):
+        parent = Organization.objects.create(name='示例集团', email='group@example.com')
+        child = Organization.objects.create(
+            name='子公司A', email='a@example.com', parent=parent
+        )
+        assert child.parent == parent
+
+    def test_list_subsidiaries(self):
+        parent = Organization.objects.create(name='集团', email='g@example.com')
+        Organization.objects.create(name='子A', email='a@example.com', parent=parent)
+        Organization.objects.create(name='子B', email='b@example.com', parent=parent)
+        assert parent.children.count() == 2

offer_backend/apps/organizations/urls.py

@@ -1,3 +1,9 @@
-from django.urls import path
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .views import OrganizationPublicViewSet, OrganizationManageViewSet
 
-urlpatterns = []
+router = DefaultRouter()
+router.register('public', OrganizationPublicViewSet, basename='org-public')
+router.register('manage', OrganizationManageViewSet, basename='org-manage')
+
+urlpatterns = [path('', include(router.urls))]

offer_backend/apps/organizations/views.py

@@ -0,0 +1,19 @@
+from rest_framework import viewsets
+from rest_framework.permissions import AllowAny
+from .models import Organization
+from .serializers import OrganizationSerializer, OrganizationTreeSerializer
+from apps.accounts.permissions import IsSuperAdmin
+
+
+class OrganizationPublicViewSet(viewsets.ReadOnlyModelViewSet):
+    """公开只读：门户展示用"""
+    queryset = Organization.objects.filter(is_active=True, parent__isnull=False)
+    serializer_class = OrganizationSerializer
+    permission_classes = [AllowAny]
+
+
+class OrganizationManageViewSet(viewsets.ModelViewSet):
+    """超管：完整增删改查"""
+    queryset = Organization.objects.all()
+    serializer_class = OrganizationSerializer
+    permission_classes = [IsSuperAdmin]