# coding=utf-8
import copy
from django import forms
from django.contrib.contenttypes.models import ContentType
from django.core.exceptions import PermissionDenied, ObjectDoesNotExist
from django.db import models
from django.forms.models import modelform_factory
from django.http import Http404
from django.template import loader
from django.template.response import TemplateResponse
from django.utils.encoding import force_unicode, smart_unicode
from django.utils.html import escape
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext as _
from django.utils.html import conditional_escape
from xadmin.layout import FormHelper, Layout, Fieldset, Container, Column, Field, Col, TabHolder
from xadmin.util import unquote, lookup_field, display_for_field, boolean_icon, label_for_field
from base import ModelAdminView, filter_hook, csrf_protect_m
# Text to display within change-list table cells if the value is blank.
EMPTY_CHANGELIST_VALUE = _('Null')
class ShowField(Field):
template = "xadmin/layout/field_value.html"
def __init__(self, callback, *args, **kwargs):
super(ShowField, self).__init__(*args)
if 'attrs' in kwargs:
self.attrs = kwargs.pop('attrs')
if 'wrapper_class' in kwargs:
self.wrapper_class = kwargs.pop('wrapper_class')
self.results = [(field, callback(field)) for field in self.fields]
def render(self, form, form_style, context):
if hasattr(self, 'wrapper_class'):
context['wrapper_class'] = self.wrapper_class
if self.attrs:
if 'detail-class' in self.attrs:
context['input_class'] = self.attrs['detail-class']
elif 'class' in self.attrs:
context['input_class'] = self.attrs['class']
html = ''
for field, result in self.results:
context['result'] = result
if field in form.fields:
if form.fields[field].widget != forms.HiddenInput:
context['field'] = form[field]
html += loader.render_to_string(self.template, context)
else:
context['field'] = field
html += loader.render_to_string(self.template, context)
return html
class ResultField(object):
def __init__(self, obj, field_name, admin_view=None):
self.text = ' '
self.wraps = []
self.allow_tags = False
self.obj = obj
self.admin_view = admin_view
self.field_name = field_name
self.field = None
self.attr = None
self.label = None
self.value = None
self.init()
def init(self):
self.label = label_for_field(self.field_name, self.obj.__class__,
model_admin=self.admin_view,
return_attr=False
)
try:
f, attr, value = lookup_field(
self.field_name, self.obj, self.admin_view)
except (AttributeError, ObjectDoesNotExist):
self.text
else:
if f is None:
self.allow_tags = getattr(attr, 'allow_tags', False)
boolean = getattr(attr, 'boolean', False)
if boolean:
self.allow_tags = True
self.text = boolean_icon(value)
else:
self.text = smart_unicode(value)
else:
if isinstance(f.rel, models.ManyToOneRel):
self.text = getattr(self.obj, f.name)
else:
self.text = display_for_field(value, f)
self.field = f
self.attr = attr
self.value = value
@property
def val(self):
text = mark_safe(
self.text) if self.allow_tags else conditional_escape(self.text)
if force_unicode(text) == '' or text == 'None' or text == EMPTY_CHANGELIST_VALUE:
text = mark_safe(
'<span class="text-muted">%s</span>' % EMPTY_CHANGELIST_VALUE)
for wrap in self.wraps:
text = mark_safe(wrap % text)
return text
def replace_field_to_value(layout, cb):
for i, lo in enumerate(layout.fields):
if isinstance(lo, Field) or issubclass(lo.__class__, Field):
layout.fields[i] = ShowField(
cb, *lo.fields, attrs=lo.attrs, wrapper_class=lo.wrapper_class)
elif isinstance(lo, basestring):
layout.fields[i] = ShowField(cb, lo)
elif hasattr(lo, 'get_field_names'):
replace_field_to_value(lo, cb)
[docs]class DetailAdminView(ModelAdminView):
"""
显示 Model 详细信息的 AdminView. 该 View 页面只能用来查看数据内容, 不能用来修改数据.
该 View 显示各字段的布局跟 :class:`xadmin.views.edit.ModelFormAdminView` 一致.
**Option属性**
.. autoattribute:: detail_layout
.. autoattribute:: detail_show_all
.. autoattribute:: detail_template
**实例属性**
.. attribute:: obj
即将被删除的对象
"""
form = forms.ModelForm
#: 详情页面的 Layout 对象，是一个标准的 Crispy Form Layout 对象。使用 Layout 可以方便的定义整个页面的结构。
# 有关 Crispy Form 可以参考其文档 `Crispy Form 文档 <http://django-crispy-forms.readthedocs.org/en/latest/layouts.html>`_
# 使用实例可以参看 :attr:`xadmin.views.edit.ModelFormAdminView.form_layout`
detail_layout = None
#: 是否显示所有字段的内容, 默认为 ``True`` . 如果为 ``True`` 则会显示 Layout 中没有列出的字段, 否则会隐藏这些字段
detail_show_all = True
#: 详情页面的模板文件
detail_template = None
form_layout = None
[docs] def init_request(self, object_id, *args, **kwargs):
"""
初始化操作。根据传入的 ``object_id`` 取得要被显示的数据对象，而后进行权限判断, 如果没有数据查看权限会显示禁止页面.
"""
self.obj = self.get_object(unquote(object_id))
# 须有查看权限
if not self.has_view_permission(self.obj):
raise PermissionDenied
if self.obj is None:
raise Http404(
_('%(name)s object with primary key %(key)r does not exist.') %
{'name': force_unicode(self.opts.verbose_name), 'key': escape(object_id)})
self.org_obj = self.obj
@filter_hook
@filter_hook
@filter_hook
@csrf_protect_m
@filter_hook
[docs] def get(self, request, *args, **kwargs):
form = self.get_model_form()
self.form_obj = form(instance=self.obj)
helper = self.get_form_helper()
if helper:
self.form_obj.helper = helper
return self.get_response()
@filter_hook
[docs] def get_context(self):
"""
**Context Params** :
``form`` : 用于显示数据的 Form 对象
``object`` : 要显示的 Model 对象
"""
new_context = {
'title': _('%s Detail') % force_unicode(self.opts.verbose_name),
'form': self.form_obj,
'object': self.obj,
'has_change_permission': self.has_change_permission(self.obj),
'has_delete_permission': self.has_delete_permission(self.obj),
'content_type_id': ContentType.objects.get_for_model(self.model).id,
}
context = super(DetailAdminView, self).get_context()
context.update(new_context)
return context
@filter_hook
[docs] def get_breadcrumb(self):
bcs = super(DetailAdminView, self).get_breadcrumb()
item = {'title': force_unicode(self.obj)}
if self.has_view_permission():
item['url'] = self.model_admin_url('detail', self.obj.pk)
bcs.append(item)
return bcs
@filter_hook
@filter_hook
[docs] def get_field_result(self, field_name):
"""
返回包含该字段内容的 :class:`ResultField` 实例.
"""
return ResultField(self.obj, field_name, self)
@filter_hook
[docs] def get_response(self, *args, **kwargs):
"""
返回 HttpResponse , 插件可以复写该方法返回特定的 HttpResponse
"""
context = self.get_context()
context.update(kwargs or {})
return TemplateResponse(self.request, self.detail_template or
self.get_template_list(
'views/model_detail.html'),
context, current_app=self.admin_site.name)
class DetailAdminUtil(DetailAdminView):
"""
工具类，主要用于在其他页面显示数据内容，用于很多显示内容的插件中，使用示例::
def some_func(self):
detail_view = self.get_model_view(DetailAdminUtil, self.model, obj)
name_value = detail_view.get_field_result('name')
"""
def init_request(self, obj):
self.obj = obj
self.org_obj = obj