自定义admin中change_list.html中字段的显示
1 使用应用中的change_list.html覆盖admin上的列表显示页面change_list.html
将django中的列表显示页,位于
D:Python36Libsite-packagesdjangocontribadmin emplatesadmin目录下
的change_list.html change_list_results.html复制到应用中,路径如下:
Mysite/应用名/templates/应用名/
2 在change_list.html页面中看到如下标签
{% result_list cl %}
将其替按为我们的自定义标签,在应用中新建目录templatetags
新建自定义标签,示例代码如下:
from django.contrib.admin.templatetags.admin_list
import *
from django import
template
#自定义标签
register = template.Library()
#注册标签
@register.inclusion_tag("应用名/change_list_results.html")
def result_list1(cl):
"""
Displays the headers and data list together
"""
headers =
list(result_headers(cl))
num_sorted_fields = 0
for
h in headers:
if h['sortable']
and h['sorted']:
num_sorted_fields += 1
return
{'cl': cl,
'result_hidden_fields':
list(result_hidden_fields(cl)),
'result_headers': headers,
'num_sorted_fields': num_sorted_fields,
#设置返回列表数据
'results':
list(results(cl))}
#取得信息列表
def results(cl):
if cl.formset:
for res, form
in zip(cl.result_list, cl.formset.forms):
yield ResultList(form, items_for_result(cl, res, form))
else:
for res
in cl.result_list:
yield ResultList(None, items_for_result(cl, res,
None))
#取得字段名称
def _coerce_field_name(field_name, field_index):
"""
Coerce a field_name (which may be a callable) to a string.
"""
if
callable(field_name):
if field_name.__name__
== '<lambda>':
return 'lambda'
+ str(field_index)
else:
return field_name.__name__
return
field_name
class ResultList(list):
# Wrapper class used to return items in a list_editable
# changelist, annotated with the form object for error
# reporting purposes. Needed to maintain backwards
# compatibility with existing admin templates.
def
__init__(self, form, *items):
self.form = form
super(ResultList,
self).__init__(*items)
#设置返回列表项
def items_for_result(cl, result, form):
"""
Generates the actual list of data.
"""
#设置带链接的字段
def
link_in_col(is_first, field_name, cl):
if cl.list_display_links
is None:
return False
if is_first
and not cl.list_display_links:
return True
return field_name
in cl.list_display_links
#第一列字段设置链接
first = True
pk = cl.lookup_opts.pk.attname
for field_index, field_name
in enumerate(cl.list_display):
#空值的显示方式
empty_value_display = cl.model_admin.get_empty_value_display()
#设置行的class属性
row_classes = ['field-%s'
% _coerce_field_name(field_name, field_index)]
try:
f, attr, value = lookup_field(field_name, result, cl.model_admin)
except ObjectDoesNotExist:
result_repr = empty_value_display
else:
empty_value_display = getattr(attr,
'empty_value_display', empty_value_display)
if f
is None or f.auto_created:
if field_name ==
'action_checkbox':
row_classes = ['action-checkbox']
allow_tags = getattr(attr,
'allow_tags',
False)
boolean = getattr(attr,
'boolean', False)
result_repr = display_for_value(value, empty_value_display, boolean)
if allow_tags:
warnings.warn(
"Deprecated allow_tags attribute used on field {}. "
"Use django.utils.html.format_html(), format_html_join(), "
"or django.utils.safestring.mark_safe() instead.".format(field_name),
RemovedInDjango20Warning
)
result_repr = mark_safe(result_repr)
if isinstance(value, (datetime.date, datetime.time)):
row_classes.append('nowrap')
else:
if isinstance(f.remote_field, models.ManyToOneRel):
field_val = getattr(result, f.name)
if field_val
is None:
result_repr = empty_value_display
else:
result_repr = field_val
else:
result_repr = display_for_field(value, f, empty_value_display)
if isinstance(f, (models.DateField, models.TimeField, models.ForeignKey)):
row_classes.append('nowrap')
if force_text(result_repr) ==
'':
result_repr = mark_safe(' ')
row_class = mark_safe(' class="%s"'
% ' '.join(row_classes))
# If list_display_links not defined, add the link tag to the first field
if
link_in_col(first, field_name, cl):
table_tag = 'th' if
first else 'td'
first =
False
# Display link to the result's change_view if the url exists, else
# display just the result's representation.
try:
url = cl.url_for_result(result)
except NoReverseMatch:
link_or_text = result_repr
else:
url = add_preserved_filters({'preserved_filters': cl.preserved_filters,
'opts': cl.opts}, url)
# Convert the pk to something that can be used in Javascript.
# Problem cases are long ints (23L) and non-ASCII strings.
if
cl.to_field:
attr = str(cl.to_field)
else:
attr = pk
value = result.serializable_value(attr)
link_or_text = format_html(
'<a href="{}"{}>{}</a>',
#取消列表编辑功能url,
"",
format_html(
' data-popup-opener="{}"', value
) if cl.is_popup
else '',
result_repr)
yield format_html('<{}{}>{}</{}>',
table_tag,
row_class,
link_or_text,
table_tag)
else:
# By default the fields come from ModelAdmin.list_editable, but if we pull
# the fields out of the form instead of list_editable custom admins
# can provide fields on a per request basis
if
(form and field_name
in form.fields and not
(
field_name == cl.model._meta.pk.name and
form[cl.model._meta.pk.name].is_hidden)):
bf = form[field_name]
result_repr = mark_safe(force_text(bf.errors) + force_text(bf))
#如果是我们要修改显示方式的字段,则修改标签
if
field_name in '**_info':
tag="<td><div><canvas class='dd' style='background-color: lightblue' height='128' width='400' {} value='{}'/></div></td>"
#添加%
elif
field_name in '字段二':
tag='<td{}>{}%</td>'
#
else:
tag='<td{}>{}</td>'
yield
format_html(tag, row_class, result_repr)
if form and not
form[cl.model._meta.pk.name].is_hidden:
yield format_html('<td>{}</td>', force_text(form[cl.model._meta.pk.name]))
3 将change_list.html中标签改为我们自定义的标签
{% result_list1 cl %}
4 在admin.py中指定列表的显示方式
class **Admin(admin.ModelAdmin):
#设置自定义列表显示方式
change_list_template = '应用名/change_list.html'
admin.site.register(model名称, **Admin)
5 如果想在js中修改页面信息,可以在应用下新建static/js目录,将js代码放到该目录下