我正在使用 django+tastypie+postgreSQL 做 Web 应用程序的后端。然后,在另一个“项目”中,我的朋友正在实现一个前端,它将利用我的后端 API 创建 AJAX 调用,从而用一些数据填充 html。好的。到目前为止,我了解如何做到这一点。
为我的 Restful API 创建不同资源时出现问题。我有一块我的模型定义如下:
# COUNTRY + MANAGER
class CountryManager(models.Manager):
def create(**kwargs):
try:
country = Country.objects.get(short_name=kwargs['short_name'])
except:
country = Country(name=kwargs['name'], short_name=kwargs['short_name'])
country.save()
return country
class Country(models.Model):
short_name = models.CharField(max_length=max_short_len, unique=True)
name = models.CharField(max_length=max_short_len, unique=False)
lat = models.DecimalField(max_digits=11, decimal_places=9, default=0.0)
lon = models.DecimalField(max_digits=12, decimal_places=9, default=0.0)
objects = CountryManager()
# REGION +`MANAGER
class RegionManager(models.Manager):
def create(**kwargs):
try:
region = Region.objects.get(short_name=kwargs['short_name'])
except:
region = Region(name=kwargs['name'], short_name=kwargs['short_name'], country=kwargs['country'])
region.save()
return region
class Region(models.Model):
name = models.CharField(max_length=max_short_len, unique=False, default='NoName')
short_name = models.CharField(max_length=max_short_len, unique=False, default='NoName')
lat = models.DecimalField(max_digits=11, decimal_places=9, default=0.0)
lon = models.DecimalField(max_digits=12, decimal_places=9, default=0.0)
country = models.ForeignKey('Country')
objects = RegionManager()
# CITY + MANAGER
class CityManager(models.Manager):
def create(**kwargs):
try:
city = City.objects.get(short_name=kwargs['short_name'])
city.lat = kwargs['lat']
city.lon = kwargs['lon']
except:
city = City(name=kwargs['name'], short_name=kwargs['short_name'], lat=kwargs['lat'], lon=kwargs['lon'])
city.save()
return city
class City(models.Model):
name = models.CharField(max_length=max_short_len, unique=False)
short_name = models.CharField(max_length=max_short_len, unique=False, default='NoName')
lat = models.DecimalField(max_digits=11, decimal_places=9, default=0.0)
lon = models.DecimalField(max_digits=12, decimal_places=9, default=0.0)
region = models.ForeignKey('Region')
objects = CityManager()
现在,如果可能的话,我想将我的 /location 资源映射为城市、地区和国家的混合体。因此,例如,如果我 GET /api/location/1,我将获得一个 JSON,例如:
{"location":[
{"city":"London",
"region":"London",
"country":"UK"
}]
}
此外,如果我发布 /api/location/1,提供 JSON,我想调用放置在模型文件中 City 类中的方法:
def saveLocation(**kwargs):
# countryN, countrySN, regionN='No region', regionSN='No region', cityN, citySN, cityLat, cityLon, locationType
# define args
countryN = kwargs.get('countryN', None)
countrySN = kwargs.get('countrySN', None)
regionN = kwargs.get('regionN', None)
regionSN = kwargs.get('regionSN', None)
cityN = kwargs.get('cityN', None)
citySN = kwargs.get('citySN', None)
cityLat = kwargs.get('cityLat', None)
cityLon = kwargs.get('cityLon', None)
locationType = kwargs.get('locationType', None)
# put nulls in the args
if regionN is None: regionN = 'No region'
if regionSN is None: regionSN = 'No region'
# control over the params
if regionSN is None or countrySN is None or citySN is None: raise Exception('Invalid parameters')
#Save the country
country = Country.objects.create(name=countryN, short_name=countrSN)
countryId = country.pk
#Save the region, if any. Else save it like "no region"
region = Region.objects.create(name=regionN, short_name=regionSN, country = country)
regionId = region.pk
#Save the city
city = City.objects.create(name=cityN, short_name=citysN, lat=cityLat, lon=cityLon, region=regionId)
return city
我遵循了 Tastypie 手册(http://django-tastypie.readthedocs.org/en/latest/cookbook.html),但它仅适用于资源=模型环境。
此外,我尝试实现自己的类 MyResource(Resource) 以避免 ModelsResource 所做的直接模型映射。但我没有这样做的技能或知识。
我想请求一些 git repo 或一些示例代码,我可以在其中学习如何在没有资源 = 模型的情况下使用 Django 实现 Restful API。
提前致谢。