Use and Attention of forms Component in django

forms component

The django framework provides an Form class to handle form submission data in web development.

Import related modules

from django import forms

from django.forms import fields

Regular use

class F1Form(forms.Form):
 username = fields.CharField(max_length=18,min_length=2,required=True)
 pwd = fields.CharField(required=True,max_length=16,min_length=6)
 age = fields.IntegerField(required=True)
 email = fields.EmailField(required=True)

Custom Error Message error_messages

class F1Form(forms.Form):
 username = fields.CharField(max_length=18,
 min_length=6,
 required=True,
 error_messages={
   'required':' User name cannot be empty ',
   'min_length':' User name too short ',
   'max_length':' User name is too long '
 }
 )

Call of html

views section:

def rege(req):
 obj = F1Form()
 return render(req,'rege.html',{'OBJ':obj})

html section:

<form action="">
 <p>{{ OBJ.username }}</p>
 <p>{{ OBJ.pwd }}</p>
 <p>{{ OBJ.age }}</p>
 <p>{{ OBJ.email }}</p>
</form>

Background data validation:

obj = F1Form(req.POST)
if obj.is_valid(): # Determine whether the transmitted value has passed the verification 
 models.UserInfo.objects.create(**obj.cleaned_data) # Writing a value to the database 

~ It should be noted that create(**obj.cleaned_data） Method to write to the database, is in forms submitted name name with the database only 1.

Summarize