我遇到了检查验证的问题我试图确保字段不能在页面字段中保留为空。当我点击页面时，我遇到了MultiValueDictKeyError。它引导我进入我的观点第61行。
if len(postData["recipe_name"])< 1:
和我的66个模特
if len(postData["recipe_name"])<1:
这是上下文所涉及的其余代码：
html
<DOCTYPE html>
<head
<a href="/home">Home</a>||<a href="/logout">Logout</a>
</head>
<body>
<h1>Add a New Recipe</h1>
<form action="/create" method="POST">
{% csrf_token %}
{% if messages %}
<ul class="messages">
{% for message in messages %}
<li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
{% endfor %}
</ul>
{% endif %}
<label for="recipe_name">
<p>Recipe Name: </p> <input type="text">
</label>
<label for="instructions">
<p>Instructions:</p><textarea name="" id="" cols="30" rows="10"></textarea>
</label>
<label for="vegetarian">
<p>Vegetarian:(Y/N)</p> <input type="text">
</label>
<label for="price">
<p>Price:</p> <input type="text">
</label>
<button type="submit">Add Recipe</button>
</body>
</form>
</DOCTYPE>>
模型
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models
import bcrypt
import re
from datetime import *
import datetime
EMAIL_REGEX = re.compile(r'^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9._-]+\.[a-zA-Z]+$')
NAME_REGEX = re.compile(r'^[aA-zZ\s]+$')
# Create your models here.
class UserManage(models.Manager):
def validate(self, postData):
errors = {}
if len(postData['first_name']) < 2:
errors["First name field can be left blank"]="first_name"
elif not NAME_REGEX.match(postData['first_name']):
errors["This is not a valid first name. Try again."]="first_name"
if len(postData['last_name']) < 2:
errors["Last name cannot be left blank"]="last_name"
elif not NAME_REGEX.match(postData['last_name']):
errors["This is not a valid last name. Try again."]="last_name"
if len(postData['email']) < 1:
errors["Email cannot be left blank"]="email"
elif not EMAIL_REGEX.match(postData['email']):
errors["this is not a valid email try again"]="email"
if (User.objects.filter(email=postData['email'])):
errors['Email already in use']="email"
print postData["email"]
if len(postData['password']) < 8:
errors["Passwords must at least 8 characters"]="password"
if postData["password"] != postData["cpassword"]:
errors["Passwords do not match"]="cpassword"
return errors
def loginvalidate(self, postData):
errors = {}
if len(postData['email'])<1:
errors["Email field can not be blank"] = "email"
if len(postData["password"])<8:
errors["Password must be at least 8 characters" ] = "password"
if len(self.filter(email=postData['email']))>0:
#print 'TRUE for emails'
currentuser =self.filter(email=postData['email'])[0]
existingpwd = currentuser.password
if not bcrypt.checkpw(postData["password"].encode(), existingpwd.encode()):
errors["Password does not match"] = "password"
else:
errors["Email does not match"] = "email"
return errors
class RecipeManage(models.Manager):
def rvalidate(self,postData):
errors={}
if len(postData["recipe_name"])<1:
errors["Recipe name too short try something longer"]="recipe_name"
if len(postData["recipe_name"])>20:
errors["Recipe name too long"]="recipe_name"
if len(postData["instructions"])<1:
errors["Instruction field must not be left blank"]="instructions"
if len(postData["instructions"])>65:
errors["Instruction is too long be more consice"]="instructions"
if len(postData["vegetarian"])<1:
errors["Vegetarian field must be filled out"]="vegetarian"
if len(postData["price"])<1:
errors["Price field must be field out"]="price"
if len(postData["price"])>15:
errors["Price field to large ."]="price"
return errors
class User(models.Model):
first_name = models.CharField(max_length=45)
last_name = models.CharField(max_length=45)
email = models.CharField(max_length=45)
password = models.CharField(max_length=45)
birthdate = models.DateField(auto_now=True)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
timesliked=models.IntegerField(default=0)
objects = UserManage()
class Recipe(models.Model):
recipe_name=models.CharField(max_length=20)
instructions=models.CharField(max_length=65)
vegetarian=models.CharField(max_length=1)
price=models.CharField(max_length=55)
key=models.ForeignKey(User,related_name="cookbook")
liker=models.ForeignKey(User,related_name="likebutton")
likee=models.ForeignKey(User,related_name="liked")
objects=RecipeManage()
视图
#-*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.shortcuts import render, redirect
from .models import User
from .models import Recipe
from django.contrib import messages
import bcrypt
# Create your views here.
def index(request):
return render(request,'index.html')
def home(request):
current_user = User.objects.get(id=request.session['user_id'])
chef=Recipe.objects.filter(key=current_user)
otherchef=Recipe.objects.exclude(id=request.session['user_id'])
context={
'user':current_user,
'chef':chef,
'otherchef':otherchef,
}
return render(request,"homepage.html",context)
def register(request):
errors = User.objects.validate(request.POST)
#print 'this process works', request.POST
if len(errors) > 0:
for error in errors:
messages.error(request, error)
return redirect("/")
else:
hashpwd = bcrypt.hashpw(request.POST["password"].encode(), bcrypt.gensalt())
newuser = User.objects.create(
first_name=request.POST['first_name'],
last_name=request.POST['last_name'],
email=request.POST['email'],
password=hashpwd)
request.session['user_id'] = newuser.id
request.session['name'] = newuser.first_name
print "session info", newuser.id, newuser.first_name
return redirect("/home")
def login(request):
errors = User.objects.loginvalidate(request.POST)
if len(errors) > 0:
for error in errors:
messages.error(request, error)
return redirect("/")
else:
user = User.objects.filter(email=request.POST['email'])[0]
request.session['user_id'] = user.id
request.session['name'] = user.first_name
return redirect("/home")
def logout(request):
request.session.clear()
print 'goodbye'
return redirect('/')
def add(request):
return render(request,"add.html")
def create(request):
errors=Recipe.objects.rvalidate(request.POST)
if len(errors)>0:
for error in errors:
messages.error(request,error)
return redirect("/add")
else:
users = User.objects.get(id = request.session['user_id'])
Recipe.objects.create(
users=users,
recipe_name=request.POST["recipe_name"],
instructions=request.POST["instructions"],
vegetarian=request.POST["vegetarian"],
price=request.POST["price"],
)
print "creating"
return redirect("/home")
def profile(request,id):
profile=Recipe.objects.get(id=id)
context={
'profile':profile
}
return render(request,"profile.html",context)
def join(request,id):
current_user = User.objects.get(id = request.session['user_id'])
target_user=User.objects.get(id=id)
possible_like=Recipe.objects.filter(target=target_user,liker=current_user)
if len(possible_like)==0:
Recipe.objects.create(
liker=current_user,
target=target_user,
like=1,
)
else:
possible_like[0].like+=1
possible_like[0].save()
target_user.timesliked+=1
target_user.save()
return redirect('/home')
答案 0 :(得分：0)
使用dict.get
rvalidate方法
<强>实施例
def rvalidate(self, postData):
errors = {}
if len(postData.get("recipe_name", [])) < 1:
errors["Recipe name too short try something longer"] = "recipe_name"
if len(postData.get("recipe_name", [])) > 20:
errors["Recipe name too long"] = "recipe_name"
if len(postData.get("instructions", [])) < 1:
errors["Instruction field must not be left blank"] = "instructions"
if len(postData.get("instructions", [])) > 65:
errors["Instruction is too long be more consice"] = "instructions"
if len(postData.get("vegetarian", [])) < 1:
errors["Vegetarian field must be filled out"] = "vegetarian"
if len(postData.get("price", [])) < 1:
errors["Price field must be field out"] = "price"
if len(postData.get("price", [])) > 15:
errors["Price field to large ."] = "price"
return errors