Python 如何从模型设置初始值'；Django中ModelForm中的自定义字段

我希望在ModelForm中自动设置PestReport国家/地区，但使用下面的代码不断出现以下错误：

TypeError at /countries/italy/pestreports/create/
pest_report_create() got an unexpected keyword argument 'country'

我最终还需要确保用户只能添加与他们个人资料所在国家相同的国家的有害生物报告。我正在使用

如何在下面的代码中将URL的关键字参数自动设置为表单（用户不能选择国家/地区）？

url.py

from django.conf.urls import patterns, include, url
from .ippc.views import pest_report_create

urlpatterns = patterns("",
    # pest report add
    url(r'^countries/(?P<country>[\w-]+)/pestreports/create/$',
        view=pest_report_create,
        name='pest-report-create'),
)

视图。py:

from django.db import models
from django import forms
from django_countries.fields import CountryField
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User

class IppcUserProfile(models.Model):
     user = models.OneToOneField("auth.User")
     country = CountryField(_("Country"))

class PestReport(models.Model):
    country = CountryField(_("Country"))
    author = models.ForeignKey(User, related_name="pest_report_author")

class PestReportForm(forms.ModelForm):

class Meta:
    model = PestReport

from .models import UserProfile, PestReport, PestReportForm
from django.template import RequestContext
from django.shortcuts import render_to_response, get_object_or_404, redirect

def pest_report_create(request):
if request.method == "POST":

    form = form(request.POST, instance=PestReport())

    user = request.user
    author_id = user.id

    profile_user = request.profile_user
    country = profile_user.country

    if form.is_valid():
        new_pest_report = form.save(commit=False)
        new_pest_report.author_id = author_id
        new_pest_report.country = country
        form.save()
        return HttpResponseRedirect('/thank-you/')
else:
    form = form(instance=PestReport())
return render_to_response('countries/pest_report_create.html', {'form': form},
    context_instance=RequestContext(request))

def pest_report_create(request, country):

    user = request.user
    author = user
    country=user.get_profile().country

    form = PestReportForm(request.POST or None)

    if request.method == "POST":
        if form.is_valid():
            new_pest_report = form.save(commit=False)
            new_pest_report.author = request.user
            new_pest_report.author_id = author.id
            form.save()
            return redirect("pest-report-detail", country=country, year=new_pest_report.publish_date.strftime("%Y"), month=new_pest_report.publish_date.strftime("%m"), slug=new_pest_report.slug)
    else:

        form = PestReportForm(initial={'country': country}, instance=PestReport())

    return render_to_response('countries/pest_report_create.html', {'form': form},
        context_instance=RequestContext(request))

{% extends "base.html" %}

{% block main %}

<form class="customform" method="POST" action="">
    {% csrf_token %}
    {{ form.non_field_errors }}
    {{ form.as_p }}
    <input type="submit" value="Submit />
</form>

{% endblock %}

更新了views.py函数（现在可以使用），这要感谢的是：

from django.db import models
from django import forms
from django_countries.fields import CountryField
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User

class IppcUserProfile(models.Model):
     user = models.OneToOneField("auth.User")
     country = CountryField(_("Country"))

class PestReport(models.Model):
    country = CountryField(_("Country"))
    author = models.ForeignKey(User, related_name="pest_report_author")

class PestReportForm(forms.ModelForm):

class Meta:
    model = PestReport

from .models import UserProfile, PestReport, PestReportForm
from django.template import RequestContext
from django.shortcuts import render_to_response, get_object_or_404, redirect

def pest_report_create(request):
if request.method == "POST":

    form = form(request.POST, instance=PestReport())

    user = request.user
    author_id = user.id

    profile_user = request.profile_user
    country = profile_user.country

    if form.is_valid():
        new_pest_report = form.save(commit=False)
        new_pest_report.author_id = author_id
        new_pest_report.country = country
        form.save()
        return HttpResponseRedirect('/thank-you/')
else:
    form = form(instance=PestReport())
return render_to_response('countries/pest_report_create.html', {'form': form},
    context_instance=RequestContext(request))

def pest_report_create(request, country):

    user = request.user
    author = user
    country=user.get_profile().country

    form = PestReportForm(request.POST or None)

    if request.method == "POST":
        if form.is_valid():
            new_pest_report = form.save(commit=False)
            new_pest_report.author = request.user
            new_pest_report.author_id = author.id
            form.save()
            return redirect("pest-report-detail", country=country, year=new_pest_report.publish_date.strftime("%Y"), month=new_pest_report.publish_date.strftime("%m"), slug=new_pest_report.slug)
    else:

        form = PestReportForm(initial={'country': country}, instance=PestReport())

    return render_to_response('countries/pest_report_create.html', {'form': form},
        context_instance=RequestContext(request))

{% extends "base.html" %}

{% block main %}

<form class="customform" method="POST" action="">
    {% csrf_token %}
    {{ form.non_field_errors }}
    {{ form.as_p }}
    <input type="submit" value="Submit />
</form>

{% endblock %}

countries/template/pest\u report\u create.html:

from django.db import models
from django import forms
from django_countries.fields import CountryField
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User

class IppcUserProfile(models.Model):
     user = models.OneToOneField("auth.User")
     country = CountryField(_("Country"))

class PestReport(models.Model):
    country = CountryField(_("Country"))
    author = models.ForeignKey(User, related_name="pest_report_author")

class PestReportForm(forms.ModelForm):

class Meta:
    model = PestReport

from .models import UserProfile, PestReport, PestReportForm
from django.template import RequestContext
from django.shortcuts import render_to_response, get_object_or_404, redirect

def pest_report_create(request):
if request.method == "POST":

    form = form(request.POST, instance=PestReport())

    user = request.user
    author_id = user.id

    profile_user = request.profile_user
    country = profile_user.country

    if form.is_valid():
        new_pest_report = form.save(commit=False)
        new_pest_report.author_id = author_id
        new_pest_report.country = country
        form.save()
        return HttpResponseRedirect('/thank-you/')
else:
    form = form(instance=PestReport())
return render_to_response('countries/pest_report_create.html', {'form': form},
    context_instance=RequestContext(request))

def pest_report_create(request, country):

    user = request.user
    author = user
    country=user.get_profile().country

    form = PestReportForm(request.POST or None)

    if request.method == "POST":
        if form.is_valid():
            new_pest_report = form.save(commit=False)
            new_pest_report.author = request.user
            new_pest_report.author_id = author.id
            form.save()
            return redirect("pest-report-detail", country=country, year=new_pest_report.publish_date.strftime("%Y"), month=new_pest_report.publish_date.strftime("%m"), slug=new_pest_report.slug)
    else:

        form = PestReportForm(initial={'country': country}, instance=PestReport())

    return render_to_response('countries/pest_report_create.html', {'form': form},
        context_instance=RequestContext(request))

{% extends "base.html" %}

{% block main %}

<form class="customform" method="POST" action="">
    {% csrf_token %}
    {{ form.non_field_errors }}
    {{ form.as_p }}
    <input type="submit" value="Submit />
</form>

{% endblock %}

{%extends“base.html”%}
{%block main%}
{%csrf_令牌%}
{{form.non_field_errors}}
{{form.as_p}}
您的URL有一个参数：

(?P<country>[\w-]+)

应该是

def pest_report_create(request, country):

然后，您需要在表单的初始数据中传递全国：

form = PestReportForm(inital={'country': country}

我还建议不要在模型模块中定义表单
谢谢！我还使用更新的views.py代码（请参阅问题中的更新）将用户的配置文件国家/地区用作默认值，并将PestReportForm代码移动到forms.py。