Django实现将一个字典传到前端显示出来

{% for m,n in field.items %}
   {{ m }}:{{ n }}
{% endfor %}

class Group(models.Model):
 name = models.CharField(max_length=255, unique=True, verbose_name='组名称')
 
 def __str__(self):
  return self.name
 
class User(models.Model):
 create_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
 update_time = models.DateTimeField(auto_now=True, verbose_name='更新时间')
 username = models.EmailField(max_length=255, unique=True, verbose_name='用户名')
 fullname = models.CharField(max_length=64, null=True, verbose_name='中文名')
 is_active = models.BooleanField(default=True, verbose_name='激活状态')
 leader = models.ForeignKey('self', null=True, on_delete=models.CASCADE, verbose_name='上级')
 group = models.ManyToManyField(Group, null=True, verbose_name='所属组')
 
 def __str__(self):
  return self.username

>>> _t = Group.objects.get(id=1)
>>> 
>>> dict = {
... 'id': _t.id,
... 'name': _t.name
... }
>>> 
>>> print(dict)
{'name': 'GroupA', 'id': 1}

>>> _t = User.objects.get(id=2)
>>> 
>>> dict = {
... 'id': _t.id,
... 'create_time': _t.create_time.strftime('%Y-%m-%d %H:%M:%S'),
... 'fullname': _t.fullname if _t.fullname else None,
... 'leader': _t.leader.fullname if _t.leader else None,
... 'group': [ i.name for i in _t.group.all() ],
... }
>>> 
>>> print(dict)
{'fullname': '运维咖啡吧', 'group': ['GroupA', 'GroupC', 'GroupE'], 'create_time': '2018-10-12 21:20:19', 'id': 2, 'leader': '公众号'}
>>> 

>>> Group.objects.get(id=1).__dict__
{'id': 1, 'name': 'GroupA', '_state': <django.db.models.base.ModelState object at 0x7f68612daef0>}
>>> 
>>> User.objects.get(id=1).__dict__
{'is_active': True, '_state': <django.db.models.base.ModelState object at 0x7f68612fa0b8>, 'id': 1, 'username': 'ops@163.com', 'leader_id': None, 'fullname': '公众号', 'update_time': datetime.datetime(2018, 10, 12, 17, 49, 35, 504141), 'create_time': datetime.datetime(2018, 10, 12, 16, 9, 7, 813660)}

>>> model_to_dict(Group.objects.get(id=1))
{'name': 'GroupA', 'id': 1}
>>> 
>>> model_to_dict(User.objects.get(id=2))
{'leader': 1, 'is_active': True, 'username': 'ops-coffee@163.com', 'fullname': '运维咖啡吧', 'group': [<Group: GroupA>, <Group: GroupC>, <Group: GroupE>], 'id': 2}

>>> model_to_dict(User.objects.get(id=2), fields=['fullname','is_active'])
{'is_active': True, 'fullname': '运维咖啡吧'}
>>> 
>>> model_to_dict(User.objects.get(id=2), exclude=['group','leader','id'])
{'fullname': '运维咖啡吧', 'is_active': True, 'username': 'ops-coffee@163.com'}

for f in chain(opts.concrete_fields, opts.private_fields, opts.many_to_many):
 if not getattr(f, 'editable', False):
  continue

from django.db.models.fields import DateTimeField
from django.db.models.fields.related import ManyToManyField
 
class User(models.Model):
 ...
 
 def to_dict(self, fields=None, exclude=None):
  data = {}
  for f in self._meta.concrete_fields + self._meta.many_to_many:
   value = f.value_from_object(self)
 
   if fields and f.name not in fields:
    continue
 
   if exclude and f.name in exclude:
    continue
 
   if isinstance(f, ManyToManyField):
    value = [ i.id for i in value ] if self.pk else None
 
   if isinstance(f, DateTimeField):
    value = value.strftime('%Y-%m-%d %H:%M:%S') if value else None
 
   data[f.name] = value
 
  return data

>>> User.objects.get(id=2).to_dict()
{'is_active': True, 'update_time': '2018-10-12 21:21:39', 'username': 'ops-coffee@163.com', 'id': 2, 'leader': 1, 'group': [1, 3, 5], 'create_time': '2018-10-12 21:20:19', 'fullname': '运维咖啡吧'}
>>> 
>>> User.objects.get(id=2).to_dict(fields=['fullname','is_active','create_time'])
{'is_active': True, 'fullname': '运维咖啡吧', 'create_time': '2018-10-12 21:20:19'}
>>> 
>>> User.objects.get(id=2).to_dict(exclude=['group','leader','id','create_time'])
{'is_active': True, 'update_time': '2018-10-12 21:21:39', 'username': 'ops-coffee@163.com', 'fullname': '运维咖啡吧'}