tastypie使用itertools链

Question

对于未来的人。我已经取消了tastypie，并且使用了Django-Rest-Framework和itertools，正如在这个问题的批准答案中所建议的那样。

我有一个2模型我想链接结果，因为它们与FK相关联。

我做了类在我API.py如下 -

class JobmstResource(ModelResource): 
    jobdtl_id = fields.ForeignKey(JobdtlResource, 'jobdtl_id') 
    class Meta: 
     jobdtlquery = Jobdtl.objects.using('Admiral').all() 
     jobmstquery = Jobmst.objects.using('Admiral').all() 
     queryset = chain(jobdtlquery, jobmstquery) 
     resource_name = 'Jobmst' 

然后我打我的API从URL调用一个ID（在这两个查询共同的ID）。

http://localhost:8080/api/jobmst/3296/?format=xml 

当我运行它，它不能抱怨 -

“itertools.chain”对象有没有属性“模型”

似乎Django的没有干净，清晰的方式做内当你想要超过1个模型的结果，因此好奇在哪里休息？我应该以不同的方式攻击。

如果我从一个简单的HTML查看查询，它将显示结果，但将值分隔为2个模型字段和全部。

我想让值显示为来自1个模型。

下面是2款有问题的models.py -

class Jobdtl(models.Model): 
    jobdtl_id = models.IntegerField(primary_key=True) 
    jobdtl_cmd = models.TextField(blank=True) 
    jobdtl_envfile = models.TextField(blank=True) 
    jobdtl_retnsn = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_allowadhoc = models.CharField(max_length=1, blank=True) 
    jobdtl_waitop = models.CharField(max_length=1, blank=True) 
    jobdtl_fromdt = models.DateTimeField(blank=True, null=True) 
    jobdtl_untildt = models.DateTimeField(blank=True, null=True) 
    jobdtl_fromtm = models.DateTimeField(blank=True, null=True) 
    jobdtl_untiltm = models.DateTimeField(blank=True, null=True) 
    jobdtl_proxy = models.ForeignKey('Usrmst', db_column='jobdtl_proxy', related_name='Jobdtl_jobdtl_proxy',blank=True, null=True) 
    jobdtl_proxy2 = models.ForeignKey('Usrmst', db_column='jobdtl_proxy2', related_name='Jobdtl_jobdtl_proxy2',blank=True, null=True) 
    jobdtl_interval = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_intervalcnt = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_unit = models.CharField(max_length=1, blank=True) 
    jobdtl_duration = models.IntegerField(blank=True, null=True) 
    jobdtl_concur = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_priority = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_minrun = models.IntegerField(blank=True, null=True) 
    jobdtl_maxrun = models.IntegerField(blank=True, null=True) 
    jobdtl_failalarm = models.CharField(max_length=1, blank=True) 
    nodmst_id = models.ForeignKey('Nodmst', db_column='Nodmst_id', related_name='Jobdtl_Nodmst_id', blank=True, null=True) 
    nodlstmst_id = models.ForeignKey('Nodlstms', db_column='Nodlstmst_id', related_name='Jobdtl_Nodlstmst_id',blank=True, null=True) 
    jobdtl_inhevent = models.CharField(max_length=1, blank=True) 
    jobdtl_inhoptions = models.CharField(max_length=1, blank=True) 
    jobdtl_inhagent = models.CharField(max_length=1, blank=True) 
    jobdtl_inhrepeat = models.CharField(max_length=1, blank=True) 
    jobdtl_inhtime = models.CharField(max_length=1, blank=True) 
    jobdtl_timewin = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_saveoutput = models.CharField(max_length=1, blank=True) 
    jobdtl_outputname = models.TextField(blank=True) 
    jobdtl_trackmethod = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_trackcmd = models.TextField(blank=True) 
    jobdtl_deplogic = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_rerun = models.CharField(max_length=1, blank=True) 
    jobdtl_params = models.TextField(blank=True) # This field type is a guess. 
    jobdtl_sapcount = models.IntegerField(blank=True, null=True) 
    jobdtl_normalexit = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_normalrange = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_normalop = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_deprerun = models.CharField(max_length=1, blank=True) 
    jobdtl_carryover = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_psjob = models.IntegerField(blank=True, null=True) 
    jobdtl_savelogonly = models.CharField(max_length=1, blank=True) 
    jobdtl_trxid = models.IntegerField(blank=True, null=True) 
    jobdtl_rerunok = models.CharField(max_length=1, blank=True) 
    jobdtl_workdir = models.TextField(blank=True) 
    jobdtl_extinfo = models.TextField(blank=True) # This field type is a guess. 
    servicemst_id = models.ForeignKey('Servicemst', db_column='Servicemst_id', blank=True, null=True) 
    jobdtl_estmethod = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_nearoutage = models.SmallIntegerField(blank=True, null=True) 
    jobdtl_trackcl = models.CharField(max_length=1, blank=True) 
    jobdtl_statuscl = models.CharField(max_length=1, blank=True) 
    jobdtl_abrtonclderr = models.CharField(max_length=1, blank=True) 
    jobdtl_estdurexclude = models.IntegerField(blank=True, null=True) 
    class Meta: 
     managed = False 
     db_table = 'jobdtl' 

class Jobmst(models.Model): 
    jobmst_id = models.IntegerField(primary_key=True) 
    jobmst_type = models.SmallIntegerField() 
    jobmst_prntid = TreeForeignKey('self', null=True, blank=True, related_name='children', db_column='jobmst_prntid') 
    jobmst_active = models.CharField(max_length=1, blank=True) 
    evntmst_id = models.IntegerField(blank=True, null=True) 
    jobmst_evntoffset = models.SmallIntegerField(blank=True, null=True) 
    jobmst_name = models.TextField(db_column='jobmst_name', blank=True) 
    jobmst_mode = models.SmallIntegerField(blank=True, null=True) 
    jobmst_owner = models.ForeignKey('Owner', db_column='jobmst_owner', related_name = 'Jobmst_Jobmst_owner', blank=True, null=True) 
    jobmst_desc = models.TextField(blank=True) # This field type is a guess. 
    jobmst_crttm = models.DateTimeField() 
    jobdtl_id = models.ForeignKey('Jobdtl', db_column='jobdtl_id', blank=True, null=True) 
    jobmst_lstchgtm = models.DateTimeField(blank=True, null=True) 
    jobmst_runbook = models.TextField(blank=True) # This field type is a guess. 
    jobcls_id = models.IntegerField(blank=True, null=True) 
    jobmst_prntname = models.TextField(blank=True) 
    jobmst_alias = models.CharField(max_length=10, blank=True) 
    jobmst_dirty = models.CharField(max_length=1, blank=True) 
    class MPTTMeta: 
     order_insertion_by = ['jobmst_id'] 
    class Meta: 
     managed = True 
     db_table = 'jobmst' 

Answer 1

您是否尝试过转换itertools.chain到一个列表：

queryset = list(chain(jobdtlquery, jobmstquery)) 

更新您可以连接上查询相同的型号是这样的：

queryset = query1 | query2 

更新如错误消息所示，您的查询集必须只有一个model。你不能用两种不同的模式实现你的目标。

这个问题好像是dublicate。

Answer 2

由于ResourceModel允许REST客户端进行筛选，分页和排序查询，然后触发相应的SQL查询，所以不可能仅使用不能灵活的迭代器。

也许你可以破解一些可行的东西，但看起来最干净的东西是使用简单的资源并添加自己的逻辑。看到这个答案Tastypie: How can I fill the resource without database?这是指文档中的资源VS ModelResource http://django-tastypie.readthedocs.org/en/latest/resources.html#why-resource-vs-modelresource