是否可以在 Tastypie 资源中请求其他 api？

Question

我正在使用 Django 1.9.6 + Tastypie 来实现 RESTFUL api，有一个 api 需要从 api 获取数据，而在另一台服务器上，我不知道该怎么做。

我找到的所有例子都是这样的：

from tastypie.resources import ModelResource
from services.models import Product
from tastypie.authorization import Authorization


class ProductResource(ModelResource):
    class Meta:
        queryset = Product.objects.all()
        resource_name = 'product'
        allowed_methods = ['get']
        authorization = Authorization()

资源类从应用程序的模型（本地数据库）中获取数据，是否可以请求另一个服务器上的 API？如果答案是肯定的，那该怎么做呢？

也许这个问题很愚蠢。

谢谢:)

Answer 1

也许您正在寻找的是nested Resources 或只是相关的资源字段，例如：

from tastypie.resources import ModelResource
from tastypie import fields
from services.models import Product
from tastypie.authorization import Authorization


class ProductResource(ModelResource):
    shelf = fields.ForeignKey('shelf.api.ShelfResource', 'shelf', null=True)

    class Meta:
        queryset = Product.objects.all()
        resource_name = 'product'
        allowed_methods = ['get']
        authorization = Authorization()

full=True 会将整个ShelfResource 放在ProductResource 中

Answer 2

已编辑

一种实现方式可能如下所示：

import requests
from requests.exceptions import RequestException
[...]    

# implementing connection in models.py gives more flexibility.
class Product(models.Model):
    [...]

    def get_something(self):
        try:
            response = requests.get('/api/v1/other/cars/12341')
        except RequestException as e:
            return {'success': False, 'error': 'Other service unavailable!'}

        if response.status_code not in [200, 201, 202, 203, 204, 205]:

            return {'success': False, 'error': 'Something went wrong ({}): {}'.format(response.status_code, response.content)}
        data = json.load(response.content)
        data['success'] = True
        return data

    def something(self):
         self.get_something()


from tastypie.resources import ModelResource
from services.models import Product
from tastypie.authorization import Authorization


class ProductResource(ModelResource):
    something = fields.CharField('something', readonly=True)

    class Meta:
        queryset = Product.objects.all()
        resource_name = 'product'
        allowed_methods = ['get']
        authorization = Authorization()

请注意，字段不会被序列化为 JSON，而是会被转义。了解如何修复它there