如何使用 django-tables2 和基于类的视图来显示来自多个表的数据？答案

【问题标题】：How to use djando-table2 with class based view to display data from multiple table?如何使用 django-tables2 和基于类的视图来显示来自多个表的数据？
【发布时间】：2017-07-27 08:18:27
【问题描述】：

models.py

class DailyRecordManager(models.Manager):
def get_query_set(self):
    qs = super(DailyRecordManager, self).get_query_set().order_by('date_organised')
    return qs

class DailyRecord(models.Model):
    date_organised = models.DateField('Ogransied Date', help_text=('Enter Date when the program is organised: CCYY-MM-DD'))
    program_name = models.TextField('program name',)
    venue = models.CharField('venue', max_length = 255, blank=True)
    organiser = models.ForeignKey(Organiser, verbose_name = 'Organiser', related_name = 'organisers')

    objects = models.Manager()
    public = DailyRecordManager()


    class Meta:
        verbose_name = 'dailyrecord'
        verbose_name_plural = 'dailyrecords'
        ordering = ['-date_organised']

    def __str__(self):
         return self.program_name

class Participant(models.Model):
    participant = models.CharField(max_length= 50, unique = True)
    daily_record = models.ForeignKey(DailyRecord, verbose_name = 'program_name')

    class Meta:
        verbose_name = 'participant'
        verbose_name_plural = 'participants'

    def __str__(self):
        return self.participant

views.py

class DailyActivityPageView(SingleTableView):
    table_class = DailyRecordTable
    queryset = DailyRecord.public.all() 
  # queryset = Participant(DailyRecord.public.all()) is not working
    template_name = 'dailyrecord/daily-activity-record.html'

tables.py

class DailyRecordTable(tables.Table):
    date_organised = tables.Column('Date')
    program_name = tables.Column( 'Program Name')
    venue = tables.Column( 'Venue')
    organiser = tables.Column( 'Organiser')
    participant = tables.Column( 'dailyrecord.participant')

# daily = tables.RelatedLinkColumn()

    class Meta:
        model = DailyRecord

现在我需要显示参与者表中的数据，对应daily_record外键。

Click this link to view the snapshot. see the last column of the table. I need the data of Participant.partcipant column here

抱歉英语不好。

谢谢

【问题讨论】：

标签： django python-3.x django-tables2

【解决方案1】：

这里有两个问题。

首先，每日记录可以有多个参与者。因此，为了填充最后一列，您必须将所有可能的参与者聚合到该列中（例如作为列表）。

其次，您应该通过在 Participant 模型中将属性“related_name”添加到 daily_record 来使 Participant 向后关联到 DailyRecord，如下所示：

daily_record = models.ForeignKey(DailyRecord, verbose_name = 'program_name', related_name="participants")

现在，您应该像这样从 daily_record 中获取参与者：

participants = DailyRecord.public.first().participants.all()

如果您有 OneToOneField 而不是 ForeignKey，您可以像这样将（单个）参与者添加到表中：

participant = tables.Column( "Participant", accessor='participant')

【讨论】：