Question

我正在关注Tastypie文档，发现自己完全陷入困境。我有以下内容：

API：

class ProjectResource(ModelResource):
    milestones = fields.ToManyField('ProjectTrackerServer.projects.api.MilestoneResource', 'projects', related_name='project', full=True)

    class Meta:
        queryset = Project.objects.all()
        resource_name = 'project'


class MilestoneResource(ModelResource):
    project = fields.ToOneField('ProjectTrackerServer.projects.api.ProjectResource', 'project')

    class Meta:
        queryset = Milestone.objects.all()
        resource_name = 'milestone'

[更新：以上API工作 - 基于以下模型]

以下是我的模特。

模特 - 里程碑：

from django.db import models
from ProjectTrackerServer.projects.models import Project
class Milestone(models.Model):
    project = models.ForeignKey(Project, related_name='projects')
    name = models.TextField()
    start_date = models.DateField()
    due_date = models.DateField()
    completed_date = models.DateField()
    description = models.TextField()
    status = models.IntegerField()

def __unicode__(self):
    return self.name

MODEL - 项目：

from django.db import models
from django.template.defaultfilters import slugify

class Project(models.Model):
     name = models.CharField(max_length=200)
     start_date = models.DateField()
     end_date = models.DateField()
     pm_id = models.IntegerField()
     status = models.IntegerField()
     slug = models.SlugField()

     def __unicode__(self):
         return self.name

     def save(self, *args, **kwargs):
         if not self.slug:
             self.slug = slugify(self.name)[:50]
             return super(Project, self).save(*args, **kwargs)

我仍然得到同样的错误：

{“error_message”：“'Project'对象没有属性'里程碑'”，“traceback”：“Traceback（最近一次调用最后一次）：\ n \ n文件\”C：\ Python27 \ lib \ site- packages \ tastypie \ resources.py \“，第192行，在包装器中\ n response = callback（request，* args，** kwargs）\ n \ n文件\”C：\ Python27 \ lib \ site-packages \ tastypie \ resources.py \“，第406行，在dispatch_detail \ n中返回self.dispatch（'detail'，request，** kwargs）\ n \ n文件\”C：\ Python27 \ lib \ site-packages \ tastypie \ resources。 py \“，第427行，在dispatch \ n response = method（request，** kwargs）\ n \ n File \”C：\ Python27 \ lib \ site-packages \ tastypie \ resources.py \“，第1058行， in get_detail \ n bundle = self.full_dehydrate（bundle）\ n \ n File \“C：\ Python27 \ lib \ site-packages \ tastypie \ resources.py \”，第654行，在full_dehydrate中\ nsundal.data [field_name ] = field_object.dehydrate（bundle）\ n \ n文件\“C：\ Python27 \ lib \ site-packages \ tastypie \ fields.py \”，第690行，脱水\ n the_m2ms = getattr（bundle.obj，self .attribute）\ n \ n属性错误：'项目'对象没有属性'里程碑'\ n“}

Answer 1

::其他资源::

This blog has an excellent django-tastypie reverse relationship example

当我遇到错误属性错误：＆＃39;选项＆＃39;对象没有属性＆＃39; api_name＆＃39; \ n＆＃34;}

我将示例行输入为

milestones = fields.ToManyField('ProjectTrackerServer.projects.api.MilestoneResource', 'projects', full=True)

class Milestone(models.Model):
    project = models.ForeignKey(Project, related_name='projects')
    ...

确保列出＆＃34; .. api.Milestone 资源

〜还〜

如果您获得关系所在的空列表，请确保将第二个参数传递给＆＃34; .ToManyField＆＃34;匹配模型文件中指定的相关名称。

...
var resp = new HttpResponseMessage(HttpStatusCode.OK) {
    Content = new StreamContent(new MemoryStream(byte_data))
};
resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
resp.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") {
    FileName = "MyFile.csv"
};

return resp;

Answer 2

从发布的代码中我发现你的里程碑模型应如下所示：

class Milestone(models.Model):
    project = ForeignKey(Project, related_name='milestones')

更新：

您的工作资源应如下所示：

class ProjectResource(ModelResource):
  milestones = fields.ToManyField('ProjectTrackerServer.projects.api.MilestoneResource', 'projects', full=True)
class Meta:
    queryset = Project.objects.all()
    resource_name = 'project'


class MilestoneResource(ModelResource):
    project = fields.ForeignKey(Project, 'project')

    class Meta:
        queryset = Milestone.objects.all()
        resource_name = 'milestone'

无法让ToMany在Tastypie工作

2 个答案: