我正在构建一个页面,用户可以在其中留下有关漏勺和变形的任何产品的评论。我已经掌握了所有必需的元素,但是我仍然有一些连接点的问题。具体而言,我如何(动态地)如何创建一个n个形式项目的序列,然后为其绑定数据?
这是我对此的尝试:
reviews =[
{
"product": "Shampoo",
"comment": ""
"rating": 3,
},
{
"product": "Soap",
"comment": "",
"rating:" 3,
},
]
rating = colander.Schema()
rating.add(colander.SchemaNode(colander.Int(), name="rating", missing=colander.null, validator=colander.Range(1, 5)))
rating.add(colander.SchemaNode(colander.String(), name="comment", validator=colander.Length(max=4096), missing=""))
ratings = colander.SequenceSchema(name="ratings", default=reviews, children=[rating])
# schema.add(colander.SchemaNode(colander.Sequence(), rating, name="ratings", default=reviews))
schema = CSRFSchema()
schema.add(ratings)
form = deform.Form(schema)
if request.method == "POST":
controls = request.POST.items()
try:
captured = form.validate(controls)
except deform.ValidationFailure as e:
return {'form': e.render()}
else:
rendered_form = form.render()
return locals()
,但这导致错误:
ValueError: Prototype for <deform.field.Field object at 4576735072 (schemanode 'ratings')> has no name
好的 - 弄清楚了。最内向的SchemaNode()
必须命名。必须使用colander.SchemaNode(colander.Sequence())
映射项目序列。
reviews =[
{
"product": "Shampoo",
"comment": "",
"rating": 3,
},
{
"product": "Soap",
"comment": "",
"rating": 3,
},
]
rating = colander.Schema(name="single_rating")
rating.add(colander.SchemaNode(colander.Int(), name="rating", missing=colander.null, validator=colander.Range(1, 5)))
rating.add(colander.SchemaNode(colander.String(), name="comment", validator=colander.Length(max=4096), missing=""))
ratings = colander.SchemaNode(colander.Sequence(), rating, name="ratings", default=reviews)
# schema.add(colander.SchemaNode(colander.Sequence(), rating, name="ratings", default=reviews))
schema = CSRFSchema()
schema.add(ratings)
form = deform.Form(schema)
if request.method == "POST":
controls = request.POST.items()
try:
captured = form.validate(controls)
except deform.ValidationFailure as e:
return {'form': e.render()}
else:
rendered_form = form.render()
return locals()