Django表2创建自定义计算字段

Question

def calculateTotalVists(days):
    total = 0
    for i in days:
        total += i
    return total

class ClientTable(tables.Table):
    class Meta:
        model = Client
        fields = ('id', 'name', 'phone')
        attrs = {'class': 'table table-striped table-bordered', 'id': 'clients'}

客户端模型具有"days"字段,该字段是列表.我想创建一个自定义列,在天数传递到calculateTotalVists()之后显示结果.但是,我不是如何使用具有函数的访问器.

Answer 1

你不能使用随机函数,并期望tables2神奇地传递从表记录中获取的适当参数.只需将其作为客户端模型上的方法(或属性):

# models.py
class Client(models.Model):
    # ...
    def total_visits(self):
        return sum(self.days)  # or whatever self.days-based calculation

# tables.py
from django_tables2.utils import A

class ClientTable(tables.Table):
    total_visits = Column(
        accessor=A('total_visits'),
        # ...
    )
    class Meta:
        model = Client
        fields = ('id', 'name', 'phone')
        sequence = ('id', 'name', 'phone', 'total_visits')
        # ...