如何检查django模型数据类型？

Question

我有一个django模型,由140列组成,包含10种日期类型,60种字符类型,70种数字类型.

class SOA_detail(models.Model):
    ...

有没有办法按数据类型分组并将列名放在一个list.

char_fields = [] # storage for character fields column name
num_fields  = [] # storage for number fields column name
date_fields = [] # storage for date fields column name

到目前为止,我知道要采用列名.

 # take all field names from model
 for model_field in SOA_detail._meta._fields():
      if #datatype is char: ---??
          char_fields.append(model_field.name)
      elif #datatype is num: ---??
          num_fields.append(model_field.name)
      elif #datatype is date: ---??
          date_field.append(model_field.name)

感谢您抽出时间阅读我的问题.

Answer 1

在python中有一个名为isinstance的内置方法,它检查对象是否是特定类的实例,使用此方法可以这样做:

for model_field in SOA_detail._meta._fields():
  if isinstance(model_field, CharField):
      char_fields.append(model_field.name)
  elif isinstance(model_field, IntegerField):
      num_fields.append(model_field.name)
  elif isinstance(model_filed, DateTimeField):
      date_field.append(model_field.name)