燒瓶 - 使用populate_obj後節省額外的領域

Question

您好我有一個小Flask應用程序，它使用populate.obj方法將表單數據保存到對象。

models.py：

class User(db.DynamicDocument): 
    username = db.StringField(unique=True) 
    email = db.StringField(unique=True) 
    role = db.IntField(default=ROLE_USER) 

class Post(db.DynamicDocument): 
    created_at = db.DateTimeField(default=datetime.datetime.now, required=True) 
    title = db.StringField(max_length=255, required=True) 
    slug = db.StringField(max_length=255, required=True) 
    comments = db.ListField(db.EmbeddedDocumentField('Comment')) 
    author = db.ReferenceField(User) 

## various subclasses of BlogPost 
... 

views.py：

class Detail(MethodView): 

decorators = [login_required] 

# Map post types to models 
class_map = { 
    'post': BlogPost, 
    'video': Video, 
    'image': Image, 
    'quote': Quote, 
} 

def get_context(self, slug=None): 

    if slug: 
     post = Post.objects.get_or_404(slug=slug) 
     # Handle old posts types as well 
     cls = post.__class__ if post.__class__ != Post else BlogPost 
     form_cls = model_form(cls, exclude=('created_at', 'comments', 'author')) 
     if request.method == 'POST': 
      form = form_cls(request.form, inital=post._data) 
     else: 
      form = form_cls(obj=post) 
    else: 
     # Determine which post type we need 
     cls = self.class_map.get(request.args.get('type', 'post')) 
     post = cls() 
     form_cls = model_form(cls, exclude=('created_at', 'comments', 'author')) 
     form = form_cls(request.form) 
    context = { 
     "post": post, 
     "form": form, 
     "create": slug is None 
    } 
    return context 

    if form.validate(): 
     post = context.get('post') 
     form.populate_obj(post) 
     post.save() 

這工作得很好。但我想這樣做也節省了用戶對象：

... 
if form.validate(): 
    post = context.get('post') 
    form.populate_obj(post) 
    post(author=MyUserObject) # this fails! 
    post.save() 

這失敗的錯誤：

TypeError: 'BlogPost' object is not callable 

有人能解釋這是爲什麼，以及如何我要救我的用戶對象？我在意，我在這裏證明我對populate_obj方法的無知。

任何幫助將不勝感激。

Answer 1

所以，答案似乎是語法。此作品：

if form.validate(): 
     post = context.get('post') 
     form.populate_obj(post) 
     post.author = g.user 
     post.save() 

Answer 2

這樣做：

if request.POST and form.validate(): 
    form.populate_obj(post) 
    post.save()