我在Dexterity表单的Schema中,无法动态更改一个字段的下拉选项,在设置另一个字段后出现问题。
这些词汇是基于SQL数据库的。
具体来说,我想在选择县/市之后更新乡镇的词汇选项。
目前,我只是无论选择哪个县/市都会获取完整的乡镇列表,因为所有尝试动态更改内容的尝试都导致了错误。
如果有帮助,将不胜感激。谢谢!
来自site.py:
这些词汇是基于SQL数据库的。
具体来说,我想在选择县/市之后更新乡镇的词汇选项。
目前,我只是无论选择哪个县/市都会获取完整的乡镇列表,因为所有尝试动态更改内容的尝试都导致了错误。
如果有帮助,将不胜感激。谢谢!
来自site.py:
from selectionProvider import SelectionProvider
vocabProvider = SelectionProvider()
@grok.provider(IContextSourceBinder)
def countySource(context):
return vocabProvider.getVocabulary('county')
@grok.provider(IContextSourceBinder)
def townshipSource(context):
return vocabProvider.getVocabulary('township')
class IESurrenderSite(form.Schema):
county = schema.Choice(
title=_(u"County"),
source=countySource,
required=True,
)
township = schema.Choice(
title=_(u"Township"),
source=townshipSource,
required=True,
)
来自selectiorProvider.py:
class SelectionProvider(object):
DB = maap_db.maap_db()
vocabularies = {}
Counties = {}
Townships = {}
def getCountiesDropdownRecordSet(self, object):
"""input:object is a string
"""
print 'in getCountiesDropdownRecordSet'
self.DB.open()
rs = self.DB.RunQuery("Select *, CountyID as [value], name as [title] From County Order By name;")
self.DB.close()
SelectionProvider.CountiesByName = {}
for rec in rs:
SelectionProvider.CountiesByName[rec['CountyID']] = rec['title']
#
return rs
def getTownshipDropdownRecordSet(self, object):
"""input:object is a string
"""
print 'in getTownshipDropdownRecordSet'
self.DB.open()
rs = self.DB.RunQuery("Select *, TownshipID as [value], name as [title] From Township Order By name;")
self.DB.close()
SelectionProvider.TownshipsByName = {}
for rec in rs:
SelectionProvider.TownshipsByName[rec['TownshipID']] = rec['title']
#
return rs
# #
def getDropdownRecordSet(self, object):
"""input:object is a string
"""
print 'in getDropdownRecordSet'
self.DB.open()
rs = self.DB.RunQuery("Select * From DropdownSelections Where object = '%s' Order By seqNo;" % (object))
self.DB.close()
return rs
def buildVocabulary(self, rs, valueField='value', titleField='title'):
"""DO NOT USE directly outside this class, see getVocabulary() or rebuildVocabulary() instead
"""
data = []
for rec in rs:
data.append(SimpleTerm(value=rec[valueField], title=_(rec[titleField])))
#
return SimpleVocabulary(data)
#
def rebuildVocabulary(self, object):
"""Force a fetch from the database and rebuild the vocabulary.
input object: a string, matches the DropdownSelections field
"""
print 'initializing %s' % (object)
if object=="county":
print 'going to CountiesDropdowns'
vocab = self.buildVocabulary(self.getCountiesDropdownRecordSet(object), "CountyID","title")
SelectionProvider.vocabularies[object] = vocab
return vocab
if object=="township":
print 'going to TownshipDropdowns'
vocab = self.buildVocabulary(self.getTownshipDropdownRecordSet(object), "TownshipID","title")
SelectionProvider.vocabularies[object] = vocab
#print _SITE_NAME, '%s selection list initialized.' % (object)
return vocab
else:
vocab = self.buildVocabulary(self.getDropdownRecordSet(object))
SelectionProvider.vocabularies[object] = vocab
return vocab
def getVocabulary(self, object):
"""Retrieve cached vocabulary
input object: a string, matches the DropdownSelections field
"""
recreate = False
if not SelectionProvider.vocabularies.has_key(object):
recreate = True
#
vocab = SelectionProvider.vocabularies.get(object)
if vocab == None or len(vocab) == 0:
recreate = True
#
if recreate:
vocab = self.rebuildVocabulary(object)
#
return vocab