1. hand-writing a form to submit data
HTML page code:
<! Doctype HTML> <HTML lang = "ZH-CN">View business logic code:
From Django. shortcuts import render, httpresponsefrom Django import forms # create your views here. class regform (forms. form): User = forms. charfield (max_length = 32) Pwd = forms. charfield (max_length = 32) def login (request): # globally defines the value of the variable, the value error_name = "" error_pwd = "" # "error_pwd =" "is required for the first GET request. The second incoming request is for the POST request to submit data if request. method = "Post": Print (123) # obtain the user input value user = request. post. get ("user") Pwd = request. post. Get ("PWD") print (User) print (PWD) # determine the data after obtaining the data if Len (User)> 6 and Len (PWD)> 6: # If the data meets the requirements, the registration is successful. Here, an httpresponse object return httpresponse ("registered successfully") Elif Len (User)> 6 and Len (PWD) is returned) <6: # the user name must be greater than 6 characters, but the password must be less than 6 Characters error_pwd = "this is a little short ~~~ "Elif Len (User) <6 and Len (PWD)> 6: # the username length is greater than 6, and the password is less than 6 error_name =" this is a little short !!! "Else: error_name =" this is a little short !!! "Error_pwd =" this is a little short ~~~ "# Return an HTML login page return render (request," register.html ", {" error_name ": error_name," error_pwd ": error_pwd })2. In Django, form submits data:
Forms code:
From Django import formsfrom app_form.models import userfrom Django. core. exceptions import validationerrorfrom Django. forms import widgetsfrom Django. core. validators import regexvalidatorfrom app_form. models import user, hobbyimport re # verify the information in the validation input box (custom validation) def check_name (value): If "snow" in value: raise validationerror ("You are not from this day") # define form class to inherit forms. form (must inherit) Class regform (forms. form): # The type string of the attribute in the specified class cannot exceed 32 characters. User = forms. charfield (Label = "username", # the words "max_length = 12" are displayed when the input tag is generated, # The maximum length of the user name input box cannot exceed 32 characters min_length = 6, # the user name input box cannot be less than 6 characters required = true, # indicates that the result required for this input box is false, that is, initial = "snow" can be empty. # initial translation is the first and initial one, that is to say, the first access to the input box is the specified value "snow" Disabled = false, # disable translation is disabled, indicating that the disabled nature of the input box is false, it indicates that the value validators = [check_name] can be entered. # The translation means verification, that is, passing the value entered by the user to the check_name function to verify error_messages = {"min_length ": "You are too short ..., less than 6 "," required ":" cannot be blank "}) # The character string of the Password attribute in the specified class must be no less than 32 characters Pwd = forms. charfield (max_length = 12, # the maximum length of the password cannot exceed 12 characters min_length = 6, # the minimum length of the password is not less than 6 Characters label = "password ", # When the input box is generated, it indicates the role of this input box. error_messages = {"min_length": "You are too short.", "max_length ": "You are too long to stand it... "," required ":" cannot be blank "}) Gender = forms. choicefield (choices = (1, "male"), (2, "female"), (3, "unknown ")), # Only One widget = widgets can be selected for a single response. radioselect (), label = "gender") Hoby = forms. choicefield (choices = (1, "soccer"), (2, "basketball"), (3, "two-color ball"), widget = widgets. checkboxselectmultiple, label = "hobby") Phone = forms. charfield (Label = "mobile phone number", validators = [regexvalidator (R "^ 1 [3-9] \ D {9} $", "mobile phone number is not serious") # mode: regexvalidator (Regular Expression, error message)]) # Pwd = forms. charfield (# label = "password", # min_length = 6, # max_length = 12, # widget = widgets. passwordinput () #) re_ped = forms. charfield (Label = "Confirm Password", min_length = 6, max_length = 12, widget = widgets. passwordinput ())
HTML code:
<! Doctype HTML> <HTML lang = "ZH-CN">Business Logic code:
Def register (request): form_obj = regform () # instantiate the regform object in a form to get the attributes and methods of regform print ("first instantiated object:", form_obj, type (form_obj) If request. method = "Post": # re-instantiate a regform object, you can get all the attributes and methods of regform form_obj = regform (request. post) print ("second instantiated object:", form_obj, type (form_obj) print ("error message:", form_obj.errors, type (form_obj.errors) for K, V in form_obj.errors.items (): Print (K, v) If form_obj.is_valid (): # cleaned_data is the verified data print (form_obj.cleaned_data) # Get A {'user ': 'tianwang Gaidi tiger, Xiaomi one-meter-five ', 'pwd': '000000'} dictionary print (form_obj.cleaned_data ["user"]) print (form_obj.cleaned_data ["PWD"]) # indicates that the registration is successful and you can enjoy the "service" provided. # return to a successful registration page, indicating that the registration is successful. Return httpresponse ("registered successfully ") # One access request is a GET request, returning an HTML page return render (request, "register2.html", {"form_obj": form_obj })
3 Hook Functions
3.1> Local hook function code:
# The local hook function only verifies the validation of a field def clean_phone (Self): # self indicates who is the validation, clean_data is the dictionary value = self obtained after being verified by the browser. cleaned_data.get ("phone") # obtain the data entered by the user and perform regular expression matching if Re. match (r '1 [3-9] \ D {9} ', value): # match (Regular Expression, string to be matched) return value # When the mobile phone number matches successfully, returns a valid mobile phone number. # If the matching fails, an exception is thrown. Raise validationerror ("Incorrect mobile phone number") def clean_re_ped (Self ): # obtain user-entered passwords Pwd = self. cleaned_data.get ("PWD") re_pwd = self. cleaned_data.get ("re_pwd") # judge whether the two passwords are consistent if Pwd = re_pwd: # When the two results are consistent, return the dictionary of the data return self. cleaned_data # When PWD is not equal to re_pwd, an exception is thrown and returned to the browser raise validationerror ("two different passwords ")3.2> code of the global hook function:
# Global hook function def clean (Self): # The Global hook is that all fields in forms can be checked. # obtain the two passwords to verify Pwd = self. cleaned_data.get ("PWD") re_pwd = self. cleaned_data.get ("re_pwd") # determine whether the two results are correct if Pwd = re_pwd: return self. cleaned_data # add error message self. add_error ("re_pwd", "two check results inconsistent") Raise validationerror ("two check results inconsistent ")Summary: main functions of the form component:
Form in Django
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
