无法让ToMany在Tastypie中工作 [英] Unable to get ToMany to work in Tastypie

问题描述

我正在关注Tastypie文档，并发现自己完全被卡住了。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。 project.api.ProjectResource'，'project'）
 
 class Meta：
 queryset = Milestone.objects.all（）
 resource_name ='milestone'
  

[更新：以上API基于以下模型]

这是我的模型。

模型 - 里程碑：

 从django.db导入模型
从ProjectTrackerServer.projects.models import项目
类里程碑（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 
  

模型 - 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）：
如果不是self.slug：
 self.slug = slugify（self.name）[：50] 
 return super（Project，self）.save（* args，** kwargs）
  

我仍然收到相同的错误：

{error_message：'Project'对象没有属性'里程碑' ，追溯：追溯（最近的最后一次呼叫）：\\\
\\\
文件\C：\Python27\lib\site-packages\tastypie\resources.py\，行192，in wrapper\\\
response = callback（request，* args，** kwargs）\\\
\\\
File \C：\Python27\lib\site- packages\tastypie\resources。 py\，行406，在dispatch_detail\\\
返回self.dispatch（'detail'，请求，** kwargs）\\\
\\\
文件\C：\Python27\lib\site- packages \tastypie\resources.py\，第427行，在dispatch\\\
response = method（request，** kwargs）\\\
\\\
File \C：\Python27\lib\\ \\site-packages\tastypie\resources.py\，第1058行get_detail\\\
bundle = self.full_dehydrate（bundle）\\\
\\\
File \C：\Python27\lib\site-packages\tastypie\resources.py\，第654行，在full_graderate\\\
bundle.data [field_name] = field_object.hydrate（bundle）\\\
\\\
文件\C：\Python27\lib\site- packages\tastypie\fields.py\\ \\，line 690，在dehydrate\\\
the_m2ms = getattr（bundle.obj，self.attribute）\\\
\\\
AttributeError：'Project'对象没有属性'里程碑'\\\
}

解决方案

从发布的代码中，我发现您的里程碑模型应如下所示：

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

更新：

您的工作资源应如下所示：

  class ProjectResource（ModelResource）：
里程碑式= 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'
  

I'm following the Tastypie docs, and have found myself utterly stuck. I have the following:

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'

[UPDATE: The above API worked - based one the models below ]

Here are my models.

MODEL - Milestone:

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 - Project:

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)

I still get the same error:

{"error_message": "'Project' object has no attribute 'milestones'", "traceback": "Traceback (most recent call last):\n\n File \"C:\Python27\lib\site-packages\tastypie\resources.py\", line 192, in wrapper\n response = callback(request, *args, **kwargs)\n\n File \"C:\Python27\lib\site-packages\tastypie\resources.py\", line 406, in dispatch_detail\n return self.dispatch('detail', request, **kwargs)\n\n File \"C:\Python27\lib\site-packages\tastypie\resources.py\", line 427, in dispatch\n response = method(request, **kwargs)\n\n File \"C:\Python27\lib\site-packages\tastypie\resources.py\", line 1058, in get_detail\n bundle = self.full_dehydrate(bundle)\n\n File \"C:\Python27\lib\site-packages\tastypie\resources.py\", line 654, in full_dehydrate\n bundle.data[field_name] = field_object.dehydrate(bundle)\n\n File \"C:\Python27\lib\site-packages\tastypie\fields.py\", line 690, in dehydrate\n the_m2ms = getattr(bundle.obj, self.attribute)\n\nAttributeError: 'Project' object has no attribute 'milestones'\n"}

解决方案

From the posted code I figure out that your Milestone model should look like this:

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

UPDATED:

Your working resource should look like this:

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'

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