Django第四課——ModelForm用法
阿新 • • 發佈：2017-12-22
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內容概要：
1.新增數據庫表中數據
2.更新數據庫表中數據
1.新增數據庫表中數據
views文件夾==》mf.py中
‘‘‘
ModelForm的功能介紹：
1.獲取所有或指定字段
2.新增數據庫表中數據
3.更新數據庫表中數據
‘‘‘
from django.shortcuts import render
from django import forms
from app01 import models
class UModelForm(forms.ModelForm):
class Meta:#定義元類,同時能將關聯的數據全部拿到（ForeignKey）
model = models.User #和models.py中的User表關聯,註意寫法：model，沒有s！！！
fields = ‘__all__‘ #取全部字段
#新增數據方法,並且同步到數據庫
def index(request):
if request.method ==‘GET‘:
obj =UModelForm()
return render(request,‘mf.html‘,{‘obj‘:obj})
elif request.method ==‘POST‘:
obj = UModelForm(request.POST)
if obj.is_valid():
print(obj.cleaned_data)
# models.User.objects.create(**obj.cleaned_data)#新增數據方法，或者用obj.save（）
obj.save()
return render(request, ‘mf.html‘, {‘obj‘:obj})
mf.html中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post" action="/mf/">
{% csrf_token %}
{{ obj.as_p }}
<input type="submit" value="提交">
</form>
</body>
</html>
models.py中
from django.db import models
class UserType(models.Model):
name = models.CharField(max_length=32)
def __str__(self):
return self.name
class User(models.Model):
name = models.CharField(max_length=32)
email = models.EmailField(max_length=32)
u_type = models.ForeignKey(‘UserType‘) #一對多
m = models.ManyToManyField(‘M2M‘) #多對多
class M2M(models.Model):
name = models.CharField(max_length=32)
def __str__(self):
return self.name
urls.py中
from django.conf.urls import url
from django.contrib import admin
from app01.views import fm
from app01.views import mf
urlpatterns = [
url(r‘^admin/‘, admin.site.urls),
url(r‘^fm/‘, fm.index),
url(r‘^aa/‘, fm.aa),
url(r‘^mf/‘, mf.index),
]
2.更新數據庫表中數據
views文件夾==》mf.py中
‘‘‘
ModelForm的功能介紹：
1.獲取所有或指定字段
2.新增數據庫表中數據
3.更新數據庫表中數據
‘‘‘
from django.shortcuts import render
from django import forms
from app01 import models
class UModelForm(forms.ModelForm):
class Meta:#定義元類,同時能將關聯的數據全部拿到（ForeignKey）
model = models.User #和models.py中的User表關聯,註意寫法：model，沒有s！！！
fields = ‘__all__‘ #取全部字段
#更新數據庫中數據
def edit_index(request,nid):
if request.method ==‘GET‘:
model_obj = models.User.objects.get(id=nid)
obj =UModelForm(instance=model_obj) #帶上現在的值
return render(request,‘mf1.html‘,{‘obj‘:obj,‘nid‘:nid})
elif request.method == ‘POST‘:
model_obj = models.User.objects.get(id=nid)
obj = UModelForm(request.POST,instance=model_obj) #這個地方也要加上instance
if obj.is_valid():
obj.save()
return render(request, ‘mf1.html‘, {‘obj‘: obj})
mf1.html中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post" action="/edit-mf-{{ nid }}/">
{% csrf_token %}
{{ obj.as_p }}
<input type="submit" value="提交">
</form>
</body>
</html>
models.py中
from django.db import models
class UserType(models.Model):
name = models.CharField(max_length=32)
def __str__(self):
return self.name
class User(models.Model):
name = models.CharField(max_length=32)
email = models.EmailField(max_length=32)
u_type = models.ForeignKey(‘UserType‘) #一對多
m = models.ManyToManyField(‘M2M‘) #多對多
class M2M(models.Model):
name = models.CharField(max_length=32)
def __str__(self):
return self.name
urls.py中
from django.conf.urls import url
from django.contrib import admin
from app01.views import fm
from app01.views import mf
urlpatterns = [
url(r‘^admin/‘, admin.site.urls),
url(r‘^fm/‘, fm.index),
url(r‘^aa/‘, fm.aa),
url(r‘^mf/‘, mf.index),
url(r‘^edit-mf-(\d+)‘, mf.edit_index),
]
Django第四課——ModelForm用法