Detailed explanation of ModelForm component of based on Django

Create a class

from django.forms import ModelForm
from django.forms import widgets as wd
from app01 import models
class  The name of the class (ModelForm):
  class Meta:
     model = models. The name of the table      #models In the name of the table 
     fields="__all__",           #  field 
     exclude=None,         #  Rule out field 
     widgets=None,          #  Custom plug-in 
     error_messages=None,    #  Custom error messages (overall error messages) from django.core.exceptions import NON_FIELD_ERRORS ) 
 
  
  def clean_ The field name      # Custom hook functions 

Instantiate object

form = Class name (instance=obj,data= request.POST)

instance passes an existing object (displays default values on the page)

data passes the value returned from the page (the value entered by the user for validation)

form. is_valid (#)

form. save # save the data to the database (modify the record in the database if there is an instance parameter and add a new record in the database if there is no instance parameter)