构建一个为foreignkey排序的1toM查询集

Question

如何构建查询以获取具有特定作者的项目中所有任务的输出？在我的模板中，我想迭代所有项目并显示父项目下的所有任务。

{% for p in projects %}
add project html
  {% for t in projects.tasks %}
    add task html
  {% endfor %}
{% endfor %} 

型号：

class Project(models.Model):
    projectname_text = models.CharField('Projectname', unique=True, max_length=200)

class Task(models.Model):
    project = models.ForeignKey(Project, on_delete=models.CASCADE,)
    task_text = models.CharField(max_length=200)
    author = models.ForeignKey(User, null=True, blank=True, related_name='author')

我希望有人能帮助我:)。

Answer 1

我建议您修改project模型上的Task字段，如下所示：

class Task(models.Model):
    project = models.ForeignKey(Project, on_delete=models.CASCADE, 
                                related_name='tasks')
    # ...

这将允许您通过project.tasks.all()访问特定项目的所有任务。

您还需要稍微修改您的模板，因为您当前指的是projects，您应该引用p，而您需要循环p.tasks.all而不仅仅是p.tasks {% for p in projects %} add project html {% for t in p.tasks.all %} add task html {% endfor %} {% endfor %} 。

projects

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