在下面的代码,我想元类NameMeta以属性添加gender到MyName类的情况下,此类不声明属性.
class NameMeta(type):
def __new__(cls, name, bases, dic):
if 'gender' not in dic:
setattr(name, 'gender', 'Male')
return super().__new__(cls, name, bases, dic)
class MyName(metaclass=NameMeta):
def __init__(self, fname, lname):
self.fname = fname
self.lname = lname
def fullname(self):
self.full_name = self.fname + self.lname
return self.full_name
inst = MyName('Joseph ', 'Vincent')
print(MyName.gender)
这是我得到的输出:
<ipython-input-111-550ff3cfae41> in __new__(cls, name, bases, dic)
2 def __new__(cls, name, bases, dic):
3 if 'gender' not in dic:
----> 4 setattr(name, 'gender', 'Male')
5 return …我有一些 django 模型通用关系字段，我希望它们出现在 graphql 查询中。石墨烯支持通用类型吗？
class Attachment(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey('content_type', 'object_id')
file = models.FileField(upload_to=user_directory_path)
class Aparto(models.Model):
agency = models.CharField(max_length=100, default='Default')
features = models.TextField()
attachments = GenericRelation(Attachment)
石墨烯类：
class ApartoType(DjangoObjectType):
class Meta:
model = Aparto
class Query(graphene.ObjectType):
all = graphene.List(ApartoType)
def resolve_all(self, info, **kwargs):
return Aparto.objects.all()
schema = graphene.Schema(query=Query)
我希望附件字段出现在 graphql 查询结果中。仅显示代理和功能。
我的代码中有这个...
@Component({
selector: 'generic-input',
template: `<div><input [formControl]="control"/></div>`,
})
export class GenericInputComponent implements OnInit {
@Input('config') config = {placeholder: 'Testability', disabled: true, type: 'text'};
control;
constructor() { }
ngOnInit() {
this.control = new FormControl();
}
}
我想通过使用某种循环或其他方式来传播配置对象中的属性，以便呈现的 html 如下所示：
<div><input placeholder='Testability', disabled=true type='text' [formControl]="control"/></div>
注意： 以下不是一个选项：
<div><input [placeholder]='config.placeholder', [disabled]='config.disabled' [formControl]="control"/></div>
欢迎任何帮助和想法。谢谢。