Question

所以我创建了一个动态表单集，允许用户添加或删除任意数量的表单。现在，我正在尝试在表单中的字段（block_name）中进行自定义验证。

似乎它正在工作，因为如果用户输入与某个正则表达式不匹配，则不会保存数据。问题是没有消息显示输入错误。

此外，如果用户输入错误数据并尝试提交页面，则会重定向到自身并删除所有输入数据。如果输入错误并且还显示错误消息，如何使页面保持在同一视图中？

forms.py：

import re
from django import forms
from django.forms.models import modelformset_factory
from inventory.models import Block
from django.core.exceptions import ValidationError
from django.core.validators import RegexValidator


# Form for block requests
class BlockForm(forms.ModelForm):
block_name = forms.CharField(required=True, validators= [RegexValidator('^s\d{3}rf\d*b\d*e\d+r\d+w\d*[cgls][abcdex][ed][hv][sbaec][a-d] [a-d][0-7][apfg]a', message="Please enter valid block name",  code="invalid_name")])

def __init__(self, *args, **kwargs):
    super(BlockForm, self).__init__(*args, **kwargs)
    self.empty_permitted = False

class Meta:
    model = Block
    fields = ['block_name', 'block_derivatives', 'block_subsystems', 'owners']

def clean_block_name(self):
    print self.cleaned_data
    block_name = self.cleaned_data.get('block_name')
    if block_name == "a":
        print ("block name is a")
        raise forms.ValidationError(
            ('Please enter a block name'))            

    return block_name

models.py：

import datetime
import re
from django.core.validators import RegexValidator
from django.core.exceptions import ValidationError

from django.db import models 
from django.utils import timezone

class Inventory(models.Model):
    class Meta:
        verbose_name_plural = "Inventories"

inventory_name = models.CharField(max_length=100)
pub_date = models.DateTimeField('date published')

def __str__(self):              # __unicode__ on Python 2
    return self.inventory_name

def was_published_recently(self):
    return self.pub_date >= timezone.now() - datetime.timedelta(days=1)

class Block(models.Model):
    class Meta:
        verbose_name_plural = "Request Blocks"

inventory = models.ForeignKey(Inventory, null=True)
block_status = models.CharField(max_length=20, blank=False)
#617block_name = models.CharField(max_length=50, blank=False, null=False, validators=[block_nameTest])
block_name = models.CharField(max_length=50, blank=False, null=False)
block_derivatives = models.CharField(max_length=100)
block_subsystems = models.CharField(max_length=40)
owners = models.CharField(max_length=100)


def __str__(self):              
    return self.block_name

def block_owners(self):
    return str(self.owners)

views.py：

from django.forms.models import modelformset_factory
from django.forms.formsets import formset_factory
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from django.views import generic
from django.http import HttpResponse
from django.shortcuts import render_to_response



from .models import Inventory, Block
from .forms import BlockForm
# Create your views here.


def requests(request, inventory_id):
    BlockFormSet = formset_factory(BlockForm, extra=1)
    inventory = get_object_or_404(Inventory, pk=inventory_id)
    formset = BlockFormSet(request.POST)
    if request.method == 'POST':
        formset = BlockFormSet(request.POST)
        if formset.is_valid():
            for form in formset:               
            print form
            form.save()
            print "Success"
            return HttpResponseRedirect('/inventory/2')
        else:
            print "Yo, this stuff is not validated"

    else:      
        print "LOLOLOLOL"

    return render(request, 'inventory/requests.html', {'inventory': inventory, 'formset': BlockFormSet})

requests.html：

{% block content %}
<div class="requestForm">
<form id="blockForm" class="original" action="{% url 'inventory:requests' inventory.id %}" method="post">{% csrf_token %}   
<!-- <a href="#" id="insert-more"> Add New Row </a> -->



        {{formset.management_form}}

        {% for form in formset %}

        <div class='item'>
            <ul>{{ form.as_table}}<ul>
            <p style=""><a class="delete" href="#">Delete</a></p>
        </div>
        {% endfor %}

        <p><a id="add" href="#">Add another item</a></p>

        <input type="submit" name="submit" value="Request Blocks" id="submitButton">




</form>
</div>
{% endblock %}

Answer 1

您在POST无效后重定向，而不是重新显示相同的表单。即使您的重定向是相同的视图，它也会丢失POST数据，因此表单是空白的。

删除第一个else块，让执行进入最后的render行。

django validationerror未被提升

1 个答案: