Question

我有一个需要管理员更新布尔值的模型。如果管理员单击它，则最终用户可以或不能访问该视图。问题在于该视图可通过具有基本文件的主页进行访问，并且需要用户ID进行检查。我在/ home / 处收到此错误 NoReverseMatch 我无法理解如何将上下文值传递给基本文件。我不想为其创建另一个视图，因为它是基本文件。

我尝试使用context_processors，但是它在home.view上给了我这个错误 int（）参数必须是字符串或数字，而不是buildin_function_or_method

我在context_processors中有两个函数，每个函数都有其自己的特征。

这是代码

settings.py

TEMPLATES = [{ 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [], 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', 'projectfiles.context_processors.emp_base_context', 'projectfiles.context_processors.lev_base_context', ],},},]

models.py

class Employee(models.Model): allowed = models.BooleanField(default=True) employee_name = models.OneToOneField(User, on_delete = models.CASCADE) employee_designation = models.CharField(max_length = 5) employee_department = models.CharField(max_length = 5) Annual_leave = models.PositiveSmallIntegerField(default=5) Sick_leave = models.PositiveSmallIntegerField(default=5) Casual_leave = models.PositiveSmallIntegerField(default=5) Half_pay = models.PositiveSmallIntegerField(default=5) Emergency_leave = models.PositiveSmallIntegerField(default=5) class Leave(models.Model): employee_leaves = models.ForeignKey(Employee, on_delete=models.CASCADE) leave_Type = models.CharField(max_length=25) leave_qty = models.PositiveSmallIntegerField(default=0) description = models.CharField(max_length=75, blank=True, null=True) submit_date = models.DateTimeField(auto_now_add=True) from_date = models.DateField(auto_now=False, auto_now_add=False) to_date = models.DateField(auto_now=False, auto_now_add=False) leave_status = models.CharField(max_length=10, default="Pending")

context_processors.py

from .models import Employee, Leave def emp_base_context(request): emp_data = Employee.objects.get(id=id) return { 'emp_base_context': emp_base_context}

urls.py

urlpatterns = [ url(r'^(?i)Home/$', views.home, name='Home-Page'), url(r'^(?i)request/(?P<emp_id>\d+)$', views.request_leave, name='Leave-Page'), # leave request

views.py

def request_leave(request, emp_id): # Requesting leave employee = Employee.objects.get(id=emp_id) if employee.allowed == True: form = Leave_Form(request.POST) if form.is_valid(): abc = form.save(commit=False) abc.employee_leaves = request.user.employee abc.save() form = Leave_Form context = {'employee': employee, 'form': form} return render(request, 'projectfiles/reqleave.html', context) else: return render(request, "projectfiles/banned.html")

base.html

<nav id="mynav" class="navbar navbar-expand-sm bg-dark"> class="glyphicon glyphicon-folder-close"></span> Leave Management System</a> </h4> </div> <div class="panel-collapse collapse panel-scroll" id="accordion"> <div class="panel panel-default"> <div class="panel-heading"> <h4 class="panel-title"> <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne"><span class="glyphicon glyphicon-folder-close"></span> Home</a> </h4> </div> <div id="collapseOne" class="panel-collapse collapse"> <div class="panel-body"> <table class="table"> <tbody> <tr> <td> The request page **<a href="{% url "Leave-Page" {{emp_base_context.id}} %}"><span class="glyphicon glyphicon-pencil text-primary"></span> Request Leave</a>** </td> </tr> <tr> <td> <a href={% url "notifications-Page" %}><span class="glyphicon glyphicon-pencil text-primary"></span> Notifications</a> </td> </tr> <td> <a href={% url "About-Page" %}><span class="glyphicon glyphicon-file text-info"></span> About</a> </td> </tr> </tbody> </table> </div> </div> </div> <div class="panel panel-default"> <div class="panel-heading"> <h4 class="panel-title"> <a data-toggle="collapse" data-parent="#accordion" href="#collapseThree"><span class="glyphicon glyphicon-user"></span> {{user.username}}</a> </h4> </div> <div id="collapseThree" class="panel-collapse collapse "> <div class="panel-body"> </div> </div> </div> <div class="panel panel-default"> <div class="panel-heading"> <h4 class="panel-title"> <a data-toggle="collapse" data-parent="#accordion" href="#collapseTwo"><span class="glyphicon glyphicon-th"></span>Remaining Leaves</a> </h4> </div> <div id="collapseTwo" class="panel-collapse collapse "> <div class="panel-body"> <table class="table"> <tbody> <tr> <td> Annual<span class="label label-success"><font color='red'><br><small>Remaining leaves</small></font></span> </td> </tr> <tr> <td> Emergency<span class="label label-success"><font color='red'><br><small>Remaining leaves</small></font></span> </td> </tr> <tr> <td> Sick<span class="label label-success"><font color='red'><br><small>Remaining leaves</small></font></span> </td> </tr> <tr> <td> Casual<span class="label label-success"><font color='red'><br><small>Remaining leaves</small></font></span> </td> </tr> </tbody> </table> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <div id="push"></div>

错误

Environment: Request Method: GET Request URL: http://127.0.0.1:8000/home/ Django Version: 1.11.20 Python Version: 2.7.16 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'projectfiles', 'crispy_forms'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Traceback: File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner 41. response = get_response(request) File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request) File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\Bitswits 3\Desktop\Intern Work\LMS\LMS\projectfiles\views.py" in home 25. return render(request, "projectfiles/HomePage.html") File "C:\Python27\lib\site-packages\django\shortcuts.py" in render 30. content = loader.render_to_string(template_name, context, request, using=using) File "C:\Python27\lib\site-packages\django\template\loader.py" in render_to_string 68. return template.render(context, request) File "C:\Python27\lib\site-packages\django\template\backends\django.py" in render 66. return self.template.render(context) File "C:\Python27\lib\site-packages\django\template\base.py" in render 205. with context.bind_template(self): File "C:\Python27\lib\contextlib.py" in __enter__ 17. return self.gen.next() File "C:\Python27\lib\site-packages\django\template\context.py" in bind_template 263. updates.update(processor(self.request)) File "C:\Users\Bitswits 3\Desktop\Intern Work\LMS\LMS\projectfiles\context_processors.py" in emp_base_context 7. emp_data = Employee.objects.get(id=id) File "C:\Python27\lib\site-packages\django\db\models\manager.py" in manager_method 85. return getattr(self.get_queryset(), name)(*args, **kwargs) File "C:\Python27\lib\site-packages\django\db\models\query.py" in get 371. clone = self.filter(*args, **kwargs) File "C:\Python27\lib\site-packages\django\db\models\query.py" in filter 787. return self._filter_or_exclude(False, *args, **kwargs) File "C:\Python27\lib\site-packages\django\db\models\query.py" in _filter_or_exclude 805. clone.query.add_q(Q(*args, **kwargs)) File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in add_q 1250. clause, _ = self._add_q(q_object, self.used_aliases) File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in _add_q 1276. allow_joins=allow_joins, split_subq=split_subq, File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in build_filter 1210. condition = self.build_lookup(lookups, col, value) File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in build_lookup 1104. return final_lookup(lhs, rhs) File "C:\Python27\lib\site-packages\django\db\models\lookups.py" in __init__ 24. self.rhs = self.get_prep_lookup() File "C:\Python27\lib\site-packages\django\db\models\lookups.py" in get_prep_lookup 74. return self.lhs.output_field.get_prep_value(self.rhs) File "C:\Python27\lib\site-packages\django\db\models\fields\__init__.py" in get_prep_value 966. return int(value) Exception Type: TypeError at /home/ Exception Value: int() argument must be a string or a number, not 'builtin_function_or_method'

错误2.0

Request Method: GET Request URL: http://127.0.0.1:8000/home/ Traceback: File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner 41. response = get_response(request) File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request) File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs) Exception Type: TypeError at /home/ Exception Value: home() takes exactly 2 arguments (1 given)

已更新

url(r'^(?i)request/(?P<emp_id>\d+)$', views.request_leave, name='Leave-Page'), <a href="{% url "Leave-Page" request.user.id %}"><span class="glyphicon glyphicon-pencil text-primary"></span> Request Leave</> def request_leave(request, emp_id): # Requesting leave employee = Employee.objects.get(employee_name=emp_id) if employee.allowed == True: form = Leave_Form(request.POST) if form.is_valid(): abc = form.save(commit=False) abc.employee_leaves = request.user.employee abc.save() form = Leave_Form context = {'employee': employee, 'form': form} # context = {'form': form} return render(request, 'projectfiles/reqleave.html', context) else: return render(request, "projectfiles/banned.html") using context_processor was passing the id to the entire view, I just needed to use it for request and by comparing the user id with the employee name worked for me.

我希望，如果管理员从后端允许用户访问，则用户可以访问请求页面并申请，否则视图会将用户重定向到其他页面。

Answer 1

由于错误

int（）参数必须是字符串或数字，而不是buildin_function_or_method

很明显，上下文处理器不喜欢返回函数或方法。

所以不要

return {'emp_base_context': emp_base_context}

返回适当的值，而不是

return {'emp_base_context': emp_data}

我也无法理解为什么不使用时声明了emp_data和lev_data。因此，我觉得您的上下文处理器应该看起来像。

from .models import Employee, Leave

def emp_base_context(request):
    emp_data = Employee.objects.get(id=id)
    return {
        'emp_base_context': emp_data}

def lev_base_context(request):
    lev_data = Leave.objects.get(id=id)
    return {
        'lev_base_context': lev_data}

Answer 2

错误在emp_data = Employee.objects.get(id=id)

中

功能

def emp_base_context(request):
    emp_data = Employee.objects.get(id=id)
    return {
        'emp_base_context': emp_data}

id来自哪里？由于您在此处未提供任何ID，因此将使用python in-built id function。您可能会注意获取id表单请求。

Answer 3

来自docs：

上下文处理器的界面非常简单：它是Python 该函数采用一个参数，一个 HttpRequest对象，并返回添加到模板上下文的字典。每个上下文处理器必须返回字典。

因此，当您执行以下操作时：emp_data = Employee.objects.get(id=id) Django引发了异常。

>>> Test.objects.get(id=id)
Traceback (most recent call last):
TypeError: int() argument must be a string, a bytes-like object or a number, not 'builtin_function_or_method'
>>> id
<built-in function id>

如果您要检索登录的用户：

def emp_base_context(request):
    emp_data = Employee.objects.get(id=request.user.id)

    return {
        'emp_base_context': emp_base_context}

主页的Django上下文值

3 个答案: