importreimport
copy
class
validateerror(exception):
def__init__
(self,detail):
self.detail =detail
####################### 外掛程式
class
textinput(object):
def__str__
(self):
return""
class
emailinput(object):
def__str__
(self):
return""
####################### 內部包含正則，用於驗證
class
field(object):
def__init__(self,required=true,error_messages=none,widget=none):
self.required =required
self.error_messages =error_messages
ifnot
widget:
self.widget =textinput()
else
: self.widget =widget
def__str__
(self):
return
str(self.widget)
class
charfield(field):
defvalid(self,val):
ifself.required:
ifnot
val:
msg = self.error_messages['
required']
raise
validateerror(msg)
return
valclass
emailfield(field):
reg = "
^\w+@\w+$
"def
valid(self,val):
ifself.required:
ifnot
val:
msg = self.error_messages['
required']
raise
validateerror(msg)
result =re.match(self.reg,val)
ifnot
result:
msg = self.error_messages.get('
invalid
','格式錯誤')
raise
validateerror(msg)
return
val#
###################### form，獲取使用者提交內容+獲取定義的字段物件
class
form(object):
def__init__(self,data=none):
#獲取派生類中的所有靜態字段
#print(self.__class__.__dict__)
self.data =data
self.fields = copy.deepcopy(self.__class__
.declare_field)
self.cleaned_data ={}
self.errors ={}
def__new__(cls, *args, **kwargs):
declare_field ={}
for field_name, field in cls.__dict__
.items():
ifisinstance(field,field):
declare_field[field_name] =field
cls.declare_field =declare_field
return object.__new__
(cls)
defis_valid(self):
#使用者提交的資料
#self.data #
#self.fields #
for field_name,filed in
self.fields.items():
try:
input_val =self.data.get(field_name)
val =filed.valid(input_val)
method = getattr(self,"
cleaned_%s
" %field_name,none)
ifmethod:
val =method(val)
self.cleaned_data[field_name] =val
except
validateerror as e:
self.errors[field_name] =e.detail
return len(self.errors) ==0
def__iter__
(self):
return
iter(self.fields.values())
class
userform(form):
username = charfield(error_messages=,widget=textinput())
pwd = emailfield(error_messages=,widget=emailinput())
################ 應用
obj = userform(data=)
ifobj.is_valid():
print('
驗證成功
',obj.cleaned_data)
else
:
print("
驗證失敗
",obj.errors)
###################### html #####################
for x in
obj:
print(x)
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