这是我的模特
class Nisit(models.Model):
和这个
class Page(models.Model):
followingNisit = models.ManyToManyField(Nisit,blank=True)
这是我的资源
class NisitResource(ModelResource):
page = fields.ToManyField('chula.api.PageResource','page_set',null=True)
class Meta:
queryset = Nisit.objects.all()
resource_name = 'nisit'
filtering = {
'page' : ALL_WITH_RELATIONS,
'id' : ALL,
}
class PageResource(ModelResource):
followingNisit = fields.ToManyField(NisitResource, 'followingNisit',null=True)
reporter = fields.ManyToManyField(ReporterResource,'reporter')
followers_count = fields.CharField(attribute='followers_count')
class Meta:
queryset = Page.objects.all()
resource_name = 'page'
authorization= Authorization()
filtering = {
'id':ALL,
'followingNisit': ALL_WITH_RELATIONS,
}
我请求时可以------- 127.0.0.1:8000/api/v2/page/?format=json&followingNisit__id=1
但是反过来，当我要求--------- 127.0.0.1:8000/api/v2/nisit/?format=json&page__id=1时，我会收到此错误
{"error_message": "Cannot resolve keyword 'page_set' into field. Choices are: displayName, facebook, faculty, friend, id, major, n_id, name, page, password, picture, reporter, year_in_school", "traceback": "Traceback (most recent call last):\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 202, in wrapper\n response = callback(request, *args, **kwargs)\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 441, in dispatch_list\n return self.dispatch('list', request, **kwargs)\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 474, in dispatch\n response = method(request, **kwargs)\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 1127, in get_list\n objects = self.obj_get_list(request=request, **self.remove_api_resource_names(kwargs))\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 1890, in obj_get_list\n base_object_list = self.apply_filters(request, applicable_filters)\n\n File \"D:\\Study\\SeniorProject\\Code\\mysite\\tastypie\\resources.py\", line 1862, in apply_filters\n return self.get_object_list(request).filter(**applicable_filters)\n\n File \"C:\\Python27\\lib\\site-packages\\django\\db\\models\\query.py\", line 624, in filter\n return self._filter_or_exclude(False, *args, **kwargs)\n\n File \"C:\\Python27\\lib\\site-packages\\django\\db\\models\\query.py\", line 642, in _filter_or_exclude\n clone.query.add_q(Q(*args, **kwargs))\n\n File \"C:\\Python27\\lib\\site-packages\\django\\db\\models\\sql\\query.py\", line 1250, in add_q\n can_reuse=used_aliases, force_having=force_having)\n\n File \"C:\\Python27\\lib\\site-packages\\django\\db\\models\\sql\\query.py\", line 1122, in add_filter\n process_extras=process_extras)\n\n File \"C:\\Python27\\lib\\site-packages\\django\\db\\models\\sql\\query.py\", line 1316, in setup_joins\n \"Choices are: %s\" % (name, \", \".join(names)))\n\nFieldError: Cannot resolve keyword 'page_set' into field. Choices are: displayName, facebook, faculty, friend, id, major, n_id, name, page, password, picture, reporter, year_in_school\n"}
答案 0 :(得分：1)
我一直在努力解决从setup_joins抛出的同一个FieldError，我想我刚刚解决了我的问题。我试图通过多对多关系来过滤，并且永远无法获得＆＃34; _set＆＃34;在fields.ToManyField()工作。在错误案例和工作简单过滤器中调试TastyPie代码之后，我意识到可以完全绕过对中间资源的需求。
这对我有用，我希望它对你的情况有所帮助。由于我不了解您的模型设置，我将构成一个类似的例子。
首先，模特：
### models.py ###
from django.db import models
class Ingredient(models.Model):
name = models.CharField(max_length=100)
description = models.TextField()
def __unicode__(self):
return '%s' % (self.name)
class RecipeIngredient(models.Model):
recipe = models.ForeignKey('Recipe')
ingredient = models.ForeignKey('Ingredient')
weight = models.IntegerField(null = True, blank = True)
def __unicode__(self):
return '%s: %s' % (self.recipe, self.ingredient)
class Recipe(models.Model):
title = models.CharField(max_length=100)
ingredients = models.ManyToManyField(Ingredient, through='RecipeIngredient')
def __unicode__(self):
return '%s' % (self.title)
以下是ModelResources：
### api.py ###
from tastypie.resources import ModelResource, ALL, ALL_WITH_RELATIONS
from tastypie import fields
from some_app.models import Ingredient, Recipe
class IngredientResource(ModelResource):
class Meta:
queryset = Ingredient.objects.all()
resource_name = 'ingredient'
filtering = {
'name': ALL,
}
class RecipeResource(ModelResource):
ingredients = fields.ToManyField(
'some_app.api.IngredientResource',
'ingredients',
full=True)
class Meta:
queryset = Recipe.objects.all()
resource_name = 'recipe'
filtering = {
'title': ALL,
'ingredients': ALL_WITH_RELATIONS,
}
注意我没有RecipeIngredientResource，我直接挂钩到IngredientResource，因为Recipe模型包含带有选项ingredients的ManyToManyField through='RecipeIngredient'
过滤特定成分的所有配方的示例网址如下所示：
http://localhost:8000/api/recipes/recipe/?ingredients__name=blueberry
而且，为了完整起见，这里有一个名为＆＃39; some_app＆＃39;的Django应用程序。为任何想要实现此示例的人节省输入数据的时间：
[
{
"pk": 1,
"model": "some_app.ingredient",
"fields": {
"name": "apple",
"description": "a tempting fruit"
}
},
{
"pk": 2,
"model": "some_app.ingredient",
"fields": {
"name": "cherry",
"description": "a red fruit"
}
},
{
"pk": 3,
"model": "some_app.ingredient",
"fields": {
"name": "blueberry",
"description": "a blue fruit"
}
},
{
"pk": 4,
"model": "some_app.ingredient",
"fields": {
"name": "flour",
"description": "used for baking and stuff"
}
},
{
"pk": 5,
"model": "some_app.ingredient",
"fields": {
"name": "sugar",
"description": "makes stuff sweet"
}
},
{
"pk": 1,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 1,
"weight": 3,
"ingredient": 1
}
},
{
"pk": 2,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 1,
"weight": 2,
"ingredient": 4
}
},
{
"pk": 3,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 1,
"weight": 4,
"ingredient": 5
}
},
{
"pk": 4,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 2,
"weight": 8,
"ingredient": 2
}
},
{
"pk": 5,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 2,
"weight": 4,
"ingredient": 4
}
},
{
"pk": 6,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 2,
"weight": 6,
"ingredient": 5
}
},
{
"pk": 7,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 3,
"weight": 15,
"ingredient": 3
}
},
{
"pk": 8,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 3,
"weight": 5,
"ingredient": 4
}
},
{
"pk": 9,
"model": "some_app.recipeingredient",
"fields": {
"recipe": 3,
"weight": 6,
"ingredient": 5
}
},
{
"pk": 1,
"model": "some_app.recipe",
"fields": {
"title": "Apple Pie"
}
},
{
"pk": 2,
"model": "some_app.recipe",
"fields": {
"title": "Cherry Pie"
}
},
{
"pk": 3,
"model": "some_app.recipe",
"fields": {
"title": "Blueberry Pie"
}
}
]
答案 1 :(得分：-1)
这是事情，如果django tastypie与django非常相似（正如任何人所料）你使用了错误的关键字，在你的情况下，它不会是page_set，只使用{ {1}}相反，它会起作用。
我建议你在字段名称中使用复数
page因此前向关系为pages = fields.ToManyField('chula.api.PageResource','page_set',null=True)
，后向关系为pages我现在无法记住。但无论如何它会看起来更好。