django tastypie : model field resource for django tastypie

example.py

#!/usr/bin/env python
# −*− coding: UTF−8 −*−

from tastypie.resources import ModelResource,Resource
from tastypie.constants import ALL, ALL_WITH_RELATIONS
from tastypie import fields
from model.db.gv.models import Jobhist,Ucjobs,Jobsnapsht,FailureInfo
from webservice.rest.resource.constant import ALL_FILTERS
from webservice.rest.common.ModelFieldResource import ModelFieldResource

class UCjobsResource(ModelResource):
    """ Manage UCJob information including:
            jobname             --
            sa_folder,          --
            primary_sae,        --
            secondary_sae,      --
            primary_ntlog,      --
            secondary_ntlog     -- """

    class Meta:
        queryset = Ucjobs.objects.all()
        resource_name = 'uc4.jobinfo'
        serializer = Serializer(formats=['json', 'xml', 'jsonp'])
        excludes = []   # fields not shown
        fields = []     #fields to show
        allowed_methods = ['get']
        list_allowed_methods = ['get']
        filtering = {
        }

class SeondaryNtlogResource(ModelFieldResource):
    class Meta:
        field_name = 'secondary_ntlog'
        resource_name='uc4.jobinfo.secondary_ntlog'
        resource = UCjobsResource()

ModelFieldResource.py

#!/usr/bin/env python
# −*− coding: UTF−8 −*−

""" ModelField resources

Author : Hao Chen (hchen9@ebay.com) """

from tastypie.resources import Resource
from tastypie.constants import ALL, ALL_WITH_RELATIONS
from tastypie import fields
from tastypie.serializers import Serializer

import logging
logger = logging.getLogger(__name__)

class FieldObject(object):
    """ Field Object

        * value     -- Field value
        * field     -- Field field """

    def __init__(self,initial=None):
        self.value = initial.get('value',None)
        self.field = initial.get('field',None)
    def __getattr__(self,name):
        return self.__dict__[name]
    def __setattr__(self,name,value):
        self.__dict__[name] = value
    def to_dict(self):
        return self.__dict__

class ModelFieldResource(Resource):
    """ Field resource for ModelResource
    """

    value = fields.CharField(
            attribute = 'value',
            help_text = 'Field value'
    )
    field = fields.CharField(
            attribute = 'field',
            help_text = 'Field name'
    )

    class Meta:
        field_name = None
        resource = None             # resource object ,!!! required !!!
        resource_name = None        # resource_name ,!!! required !!!
        object_class = FieldObject
        serializer = Serializer(formats=['json','xml','jsonp'])
        list_allowed_methods = ['get']
        detail_allowed_methods = ['get'],

    def detail_uri_kwargs(self,bundle_or_obj):
        kwargs = {}
        if isinstance(bundle_or_obj,Bundle):
            kwargs['field'] = bundle_or_obj.obj.attribute
            kwargs['value'] = bundle_or_obj.obj.value
        else:
            kwargs['field'] = bundle_or_obj.attribute
            kwargs['value'] = bundle_or_obj.value
        return kwargs


    def get_object_list(self,request):
        results = list()
        values =  self.Meta.resource.Meta.queryset.values(self.Meta.field_name).distinct()
        for v in values:
            results.append(FieldObject({'field':self.Meta.field_name,'value':v[self.Meta.field_name]}))
        return results

    def obj_get_list(self,request=None, **kwargs):
        return self.get_object_list(request)