发布数据同时创建相关的Tastypie资源？ [英] Posting data to create related Tastypie resources simultaneously?

问题描述

p> models.py

  class A（models.Model）：
 name = models.CharField（max_length = 5）
 
 class B（models.Model）：
 name = models.CharField（max_length = 5）
a = models.ForeignKey（A）
  

给定（潜在非最佳）Tastypie资源：

api.py

  class AResource（ModelResource）：
 bs = fields.ToManyField（'projectname.api.BResource'，'bs'，full = True）
 class Meta：
 queryset = A.objects.all（）
 
 class BResource （ModelResource）：
a = fields.ToOneField（AResource，'a'，full = True）
 class Meta：
 queryset = B.objects.all（）
  

让我们假设数据库是空的。现在我有相关的外部数据，并希望将数据库与A的一个实例和B的几个实例一起聚集。

什么是最漂亮的Tastypionic方法这个问题？是否有可能同时挤满A和B？或者我需要先A人群，然后将B的A的ID作为ForeignKey提供给人群。

如果有人可以提出一个示例（使用例如一个python字典和httplib2或curl）。

感谢一百万。

解决方案

解决方案在这里。使用自动填充反向关系的tastypie字段的相关名称，同时创建多个对象。
http：// django-tastypie.readthedocs.org/en/v0.10.0/fields.html#tastypie.fields.RelatedField.related_name

RelatedField.related_name

用于在创建数据时自动填充反向关系。默认为无。

为了使此选项正常工作，另一个资源中必须有一个字段作为属性/ instance_name。通常这只是意味着添加一个反映的ToOneField指向。

示例：

  class EntryResource（ModelResource）：
 authors = fields.ToManyField（'path.to.api.resources.AuthorResource'，'author_set'，related_name ='entry'）
 
 class Meta ：
 queryset = Entry.objects.all（）
 resource_name ='entry'
 
 class AuthorResource（ModelResource）：
 entry = fields.ToOneField（EntryResource，条目'）
 
 class Meta：
 queryset = Author.objects.all（）
 resource_name ='author'
  

使用 related_name 执行任务。它映射相关字段的对象，并在创建数据时自动填充关系。

与 full = True 在资源的两边，它将生成最大递归深度超出异常，因为这两个资源在彼此之间是完整的。

Given two related Django models A and B in a OneToMany relationship:

models.py

class A(models.Model):
  name = models.CharField(max_length=5)

class B(models.Model):
  name = models.CharField(max_length=5)
  a = models.ForeignKey(A)

And given (potentially non-optimal) Tastypie resources:

api.py

class AResource(ModelResource):
    bs = fields.ToManyField( 'projectname.api.BResource', 'bs', full = True)
    class Meta:
        queryset = A.objects.all()

class BResource(ModelResource):
    a = fields.ToOneField( AResource, 'a', full = True)
    class Meta:
        queryset = B.objects.all()

Let's assume the database is empty so far. Now I have related external data, and would like to crowd the database it with both an instance of A and several instances of B.

What is the prettiest Tastypionic way to approach this problem? Is it possible to crowd both A and the Bs at once? Or do I need to crowd first A, and then crowd B supplying A's ID as the ForeignKey?

It would be great if someone could come up with an post example (using e.g. a python dictionary and httplib2, or curl).

Thanks a million.

解决方案

The solution is here . Use the related name for tastypie fields which automatically populate the reverse relationship while creating multiple objects at once. http://django-tastypie.readthedocs.org/en/v0.10.0/fields.html#tastypie.fields.RelatedField.related_name

RelatedField.related_name

Used to help automatically populate reverse relations when creating data. Defaults to None.

In order for this option to work correctly, there must be a field on the other Resource with this as an attribute/instance_name. Usually this just means adding a reflecting ToOneField pointing back.

Example:

class EntryResource(ModelResource):
    authors = fields.ToManyField('path.to.api.resources.AuthorResource', 'author_set', related_name='entry')

    class Meta:
        queryset = Entry.objects.all()
        resource_name = 'entry'

class AuthorResource(ModelResource):
    entry = fields.ToOneField(EntryResource, 'entry')

    class Meta:
        queryset = Author.objects.all()
        resource_name = 'author'

Use of related_name do the task. it maps the objects of related fields and automatically populates the relations when creating data.

as you did full=True on both side of your resources it will generate maximum recursion depth exceeded exception because both resources are full in each others.

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