Question

我想从两个表Project和User1中获取并显示详细信息（name_project，user_name）

models.py

class Project(models.Model):
    name_project = models.CharField(max_length=50)
    leader = models.ForeignKey('User1', default='')
    category_project = models.CharField(max_length=50)
class User1(models.Model):
    user_name = models.CharField(max_length=30)
    mail = models.EmailField(max_length=50)
    password = models.CharField(max_length=50)

views.py

def list_project(request):
queryset = Project.objects.raw(
    'SELECT scrum_rest_project.id, scrum_rest_project.name_project, scrum_rest_user1.user_name FROM scrum_rest_user1,scrum_rest_project WHERE scrum_rest_user1.id = scrum_rest_project.leader_id')
queryset = serializers.serialize('json', queryset)
return HttpResponse(queryset, content_type="application/json")

但它只显示json文件中Project表中的数据，我想显示来自User1表的数据

Answer 1

您应该使用select related feature：

Project.objects.select_related().all()

Answer 2

为什么使用原始SQL？了解Querysets。
的 1。使用Querysets：

projects = Project.objects.select_related('leader').all()
for project in projects:
    print project.name, project.leader.user_name

注意：select_related创建与User1的联接，并在访问User1模型时为您节省额外的SQL查询

<强> 2。只获取领导者和项目名称列表。

project_list = Project.objects.select_related('leader')\
                              .values_list('name', 'leader__user_name')

Django从多个表中获取数据

2 个答案: