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import operator |
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import six |
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from django.db.models import Q |
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from django.http import HttpResponseRedirect |
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from django.contrib.auth.views import redirect_to_login |
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from django.contrib.auth import REDIRECT_FIELD_NAME |
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from django.conf import settings |
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from django.contrib import messages |
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from crudbuilder.helpers import plural |
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from crudbuilder.signals import crudbuilder_signals |
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if six.PY3: |
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from functools import reduce |
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class LoginRequiredMixin(object): |
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""" |
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View mixin which verifies that login required for the crud builder |
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""" |
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login_url = settings.LOGIN_URL |
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redirect_field_name = REDIRECT_FIELD_NAME # Set by django.contrib.auth |
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def handle_login_required(self, request): |
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return redirect_to_login( |
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request.get_full_path(), |
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self.login_url, |
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self.redirect_field_name) |
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def dispatch(self, request, *args, **kwargs): |
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global_login_required = getattr( |
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settings, 'LOGIN_REQUIRED_FOR_CRUD', False) |
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if global_login_required or self.login_required: |
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if not request.user.is_authenticated(): |
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return self.handle_login_required(request) |
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return super(LoginRequiredMixin, self).dispatch( |
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request, *args, **kwargs) |
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class PermissionRequiredMixin(object): |
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""" |
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View mixin which verifies that the logged in user has the specified |
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permission. |
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""" |
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def check_permissions(self, request): |
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perms = self.permissions |
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result = request.user.has_perm(perms) if perms else True |
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return result |
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def dispatch(self, request, *args, **kwargs): |
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has_permission = self.check_permissions(request) |
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global_permission_required = getattr( |
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settings, 'PERMISSION_REQUIRED_FOR_CRUD', False) |
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if global_permission_required or self.permission_required: |
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if not has_permission: |
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return redirect_to_login( |
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request.get_full_path(), |
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settings.LOGIN_URL, |
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REDIRECT_FIELD_NAME) |
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return super(PermissionRequiredMixin, self).dispatch( |
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request, *args, **kwargs) |
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class CrudBuilderMixin(LoginRequiredMixin, PermissionRequiredMixin): |
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""" |
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- Mixin to provide additional context data for the templates |
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- app_label : return app_label for CRUD model |
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- actual_model_name : returns the actual model name (person -> person) |
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- pluralized_model_name : return the pluralized_model_name |
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(person -> people) |
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""" |
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def get_context_data(self, **kwargs): |
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context = super(CrudBuilderMixin, self).get_context_data(**kwargs) |
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model = context['view'].model |
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context['app_label'] = model._meta.app_label |
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context['actual_model_name'] = model.__name__.lower() |
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context['pluralized_model_name'] = plural(model.__name__.lower()) |
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context['project_name'] = getattr( |
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settings, 'PROJECT_NAME', 'CRUDBUILDER') |
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return context |
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@property |
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def get_actual_signal(self): |
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view = 'update' if self.object else 'create' |
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if self.inlineformset: |
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return crudbuilder_signals['inlineformset'][view] |
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else: |
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return crudbuilder_signals['instance'][view] |
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class BaseDetailViewMixin(CrudBuilderMixin): |
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def get_context_data(self, **kwargs): |
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context = super(BaseDetailViewMixin, self).get_context_data(**kwargs) |
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context['inlineformset'] = self.inlineformset |
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return context |
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class CreateUpdateViewMixin(CrudBuilderMixin): |
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"""Common form_valid() method for both Create and Update views""" |
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def form_valid(self, form): |
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signal = self.get_actual_signal |
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instance = form.save(commit=False) |
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signal.send(sender=self.model, request=self.request, instance=instance) |
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instance.save() |
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form.save_m2m() |
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return super(CreateUpdateViewMixin, self).form_valid(form) |
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class BaseListViewMixin(CrudBuilderMixin): |
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""" |
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- Search implementation for tables2 in ListView. |
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- search_feilds will be defined in actual model |
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- Override get_queryset method of ListView |
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""" |
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def get_queryset(self): |
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if self.custom_queryset: |
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objects = self.custom_queryset(self.request, **self.kwargs) |
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else: |
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objects = self.model.objects.all() |
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search = self.request.GET.get('search') |
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if search: |
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q_list = [ |
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Q( |
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('{}__icontains'.format(field), search)) |
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for field in self.crud.search_fields |
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] |
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objects = objects.filter(reduce(operator.or_, q_list)) |
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return objects.order_by('-id') |
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def get_context_data(self, **kwargs): |
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context = super(BaseListViewMixin, self).get_context_data(**kwargs) |
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if self.custom_context: |
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custom_context = self.custom_context(self.request, context, **kwargs) |
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context.update(custom_context) |
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return context |
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class InlineFormsetViewMixin(CrudBuilderMixin): |
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def get_context_data(self, **kwargs): |
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context = super( |
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InlineFormsetViewMixin, self).get_context_data(**kwargs) |
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if self.request.POST: |
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context['inlineformset'] = self.inlineformset( |
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self.request.POST, |
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instance=self.object |
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) |
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else: |
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context['inlineformset'] = self.inlineformset( |
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instance=self.object |
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) |
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return context |
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def form_valid(self, form): |
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context = self.get_context_data() |
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inlineformset = context['inlineformset'] |
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if inlineformset.is_valid(): |
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parent = form.save(commit=False) |
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inlineformset.instance = parent |
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children = inlineformset.save(commit=False) |
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# execute post signals |
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signal = self.get_actual_signal |
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signal.send( |
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sender=self.model, |
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request=self.request, |
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parent=parent, |
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children=children) |
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parent.save() |
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inlineformset.save() |
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inlineformset.save_m2m() |
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return HttpResponseRedirect(self.success_url) |
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else: |
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messages.error( |
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self.request, inlineformset.non_form_errors()) |
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return self.render_to_response( |
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self.get_context_data(form=form, inlineformset=inlineformset) |
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) |
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asifpy /
django-crudbuilder
