延长Plone-Controlpanel表格
问题描述:
是否可以使用每个插件扩展ControlPanel-View?延长Plone-Controlpanel表格
对于实施例
ca.db.core - >使对于DB连接设置基本字段集/标签
ca.db.person - >如果安装,增加了 “核心” 设置的新字段集/标签的人的特定字段/设置
ca.db.schema - >如果安装了,还增加了对schema.org领域的新字段集/标签
答
是的,它是可能的,我曾经讨论过这个问题,一个人,他写了bda.plone.shop插件。
他们面临同样的问题,并通过使用ContextProxy对象来解决它,它将不同的模式定义放在一个代理对象中。
使用代理是恕我直言hack,但我不知道更好的解决方案。
代理尝试从模式列表中获取/设置属性。 请注意,您需要处理冲突的名称,这意味着如果您在多个模式中具有相同的字段名称。
class ContextProxy(object):
def __init__(self, interfaces):
self.__interfaces = interfaces
alsoProvides(self, *interfaces)
def __setattr__(self, name, value):
if name.startswith('__') or name.startswith('_ContextProxy__'):
return object.__setattr__(self, name, value)
registry = getUtility(IRegistry)
for interface in self.__interfaces:
proxy = registry.forInterface(interface)
try:
getattr(proxy, name)
except AttributeError:
pass
else:
return setattr(proxy, name, value)
raise AttributeError(name)
def __getattr__(self, name):
if name.startswith('__') or name.startswith('_ContextProxy__'):
return object.__getattr__(self, name)
registry = getUtility(IRegistry)
for interface in self.__interfaces:
proxy = registry.forInterface(interface)
try:
return getattr(proxy, name)
except AttributeError:
pass
raise AttributeError(name)
现在,您需要使用代理在ControlPanel控制形式。 我假设你正在使用的RegistryEditForm
从plone.registry
:
class SettingsEditForm(controlpanel.RegistryEditForm):
schema = ISettings
label = _(u"Settings")
description = _(u"")
# IMPORTANT Note 1 - This is where you hook in your proxy
def getContent(self):
interfaces = [self.schema] # Base schema from ca.db.core
interfaces.extend(self.additionalSchemata) # List of additional schemas
return ContextProxy(interfaces)
# IMPORTANT Note 2 - You may get the additional schemas dynamically to extend the Settings Form. For example by name (startswith...)
# In this case they have a separate interface, which marks the relevant interfaces.
@property
def additionalSchemata(self):
registry = getUtility(IRegistry)
interface_names = set(record.interfaceName for record
in registry.records.values())
for name in interface_names:
if not name:
continue
interface = None
try:
interface = resolve(name)
except ImportError:
# In case of leftover registry entries of uninstalled Products
continue
if ISettingsProvider.providedBy(interface):
yield interface
...
你可以找到完整的代码here