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from ZODB import FileStorage, DB
from ZEO.ClientStorage import ClientStorage
from Persistence import Persistent
import __main__
global dbroot
dbroot, objectsTypeMap=None, None
class CherryObject(Persistent): pass
class CherryObjectType:
def __init__(self, objectType, fieldMap, tuneMap):
self.objectType=objectType
self.fieldMap=fieldMap
self.tuneMap=tuneMap
def newObject(self, **kw):
obj=CherryObject()
for key, value in kw.items():
setattr(obj, key, value)
self.saveObject(obj)
return obj
def getObjectById(self, id):
return dbroot[self.objectType]['id'][int(id)]
def getObjects(self, criteriaList=[]):
if not dbroot.has_key(self.objectType): return []
res=[]
allObjects=dbroot[self.objectType]['id'].values()
if not criteriaList: return allObjects
for object in allObjects:
for critName, critOp, critValue in criteriaList:
if eval("object.%s %s critValue"%(critName, critOp, critValue)):
res.append(object)
return res
def getAllObjectsIdsAndLabels(self):
res=[(0, "-- Please choose one --")]
try: evalLabel=self.tuneMap["global"]["label"]
except KeyError: evalLabel="object.name"
for object in self.getObjects(): res.append((str(object.id), eval(evalLabel)))
return res
def printAllObjects(self):
objectList=self.getObjects()
for object in objectList:
self.printObject(object)
def printObject(self, object):
print "************* %s object *********"%self.objectType
print "id:",object.id
for fieldName, fieldType in self.fieldMap.items():
print fieldName+":",encodeValue(fieldType, getattr(object,fieldName))
print
def checkObject(self, object):
pass # TBC
def saveObject(self, object):
print "Saving:", object
# Put default values if some fields are missing
object._p_changed=1
for fieldName, fieldType in self.fieldMap.items():
if not hasattr(object, fieldName): setattr(object, fieldName, decodeValue(fieldType, None))
if hasattr(object,'id'):
# It's an update
#print "UPDATE"
action="update"
objectId=object.id
previousObject=dbroot[self.objectType]['id'][objectId]
self.removeObject(previousObject)
else:
# It's a new object
# Set the object id
if not dbroot.has_key(self.objectType):
objectId=1
dbroot[self.objectType]={}
dbroot[self.objectType]['id']={}
else:
idList=dbroot[self.objectType]['id'].keys()
if idList: objectId=max(idList)+1
else: objectId=1
object.id=objectId
dbroot[self.objectType]['id'][objectId]=object
# Add linkBack if any
for fieldName, objectName, _fieldName, relation in self.getLinks():
if relation.find("1to")==0:
_object=getattr(object, fieldName)
if _object!=None:
if relation.find("to1")==1:
setattr(_object, _fieldName, object)
_object._p_changed=1
elif relation.find("toN")==1:
getattr(_object, _fieldName).append(object)
_object._p_changed=1
elif relation.find("Nto")==0:
_objectList=getattr(object, fieldName)
for _object in _objectList:
if _object!=None:
if relation.find("to1")==1:
setattr(_object, _fieldName, object)
_object._p_changed=1
elif relation.find("toN")==1:
getattr(_object, _fieldName).append(object)
_object._p_changed=1
else: raise "ERROR"
dummy=dbroot[self.objectType]
dbroot[self.objectType]=dummy # Trick to force ZODB to resave that
get_transaction().commit()
# Delete an object
def removeObject(self, object):
# Remove old linkBack if any
for fieldName, objectName, _fieldName, relation in self.getLinks():
if relation.find("1to")==0:
_object=getattr(object, fieldName)
if _object!=None:
if relation.find("to1")==1 and object==getattr(_object, _fieldName)==object:
setattr(_object, _fieldName, None)
_object._p_changed=1
elif relation.find("toN")==1 and object in getattr(_object, _fieldName):
getattr(_object, _fieldName).remove(object)
_object._p_changed=1
elif relation.find("Nto")==0:
_objectList=getattr(object, fieldName)
for _object in _objectList:
if _object!=None:
if relation.find("to1")==1 and object==getattr(_object, _fieldName)==object:
setattr(_object, _fieldName, None)
_object._p_changed=1
elif relation.find("toN")==1 and object in getattr(_object, _fieldName):
getattr(_object, _fieldName).remove(object)
_object._p_changed=1
else: raise "ERROR"
del dbroot[self.objectType]['id'][object.id]
dummy=dbroot[self.objectType]
dbroot[self.objectType]=dummy # Trick to force ZODB to resave that
get_transaction().commit()
def getLinks(self):
res=[]
for fieldName, fieldType in self.fieldMap.items():
if fieldType.find('link to ')==0: relationLeft="1"
elif fieldType.find('list of links to ')==0: relationLeft="N"
else: continue
if fieldType[-9:]==" linkBack": fieldType=fieldType[:-9]
_objectName=fieldType.split()[-1].split('.')[0]
_fieldName=fieldType.split('.')[-1]
_fieldType=eval("%s.fieldMap"%_objectName)[_fieldName]
if _fieldType.find('link to ')==0: relationRight="1"
else: relationRight="N"
res.append((fieldName, _objectName, _fieldName, relationLeft+"to"+relationRight))
return res
def init(file, _objectsTypeMap, objectsTuneMap={}):
global dbroot, objectsTypeMap
#storage = FileStorage.FileStorage('Forum.fs')
storage = ClientStorage(('localhost', 8090))
db = DB(storage)
conn = db.open()
dbroot = conn.root()
objectsTypeMap=_objectsTypeMap
for objectType, fieldMap in objectsTypeMap.items():
ot=objectType
tuneMap=objectsTuneMap.get(objectType, {})
cot=CherryObjectType(ot, fieldMap, tuneMap)
setattr(__main__, ot, cot)
globals()[ot]=cot
def initWeb(file, _objectsTypeMap, objectsTuneMap={}):
init(file, _objectsTypeMap, objectsTuneMap)
newMasksAndViews={'viewAllObjects':1, 'editObject':1, 'editObjectFormAction':1, 'addObject':1, 'deleteObject':1}
for objectType, fieldMap in _objectsTypeMap.items():
ot=objectType
tuneMap=objectsTuneMap.get(objectType, {})
cotw=__main__.CherryObjectTypeWeb(ot, fieldMap, tuneMap)
setattr(__main__, ot, cotw)
globals()[ot]=cotw
__main__.maskAndViewMap[ot]=newMasksAndViews
# Convert a value to its "encoded" representation (for instance, a representation that can be used in a web form=
def encodeValue(fieldType, value):
i=fieldType.find(" linkBack")
if i!=-1: fieldType=fieldType[:i]
if fieldType in ("string", "text", "float"):
if not value: return ''
return str(value)
elif fieldType=="boolean":
if not value: return "0"
return "1"
elif fieldType.find("link to ")==0:
if not value: return "0"
else: return str(value.id)
elif fieldType.find("list of links to ")==0:
if not value: return []
objectName=fieldType.split()[-1].split('.')[0]
if type(value)!=type([]): value=[value]
res=[]
for item in value: res.append(encodeValue("link to "+objectName, item))
return res
else: raise "ERROR: fieldType not implemented: %s"%fieldType
# Reverse function for encodeValue
def decodeValue(fieldType, value):
i=fieldType.find(" linkBack")
if i!=-1: fieldType=fieldType[:i]
if fieldType in ("string", "text"):
if not value: return ''
return str(value)
elif fieldType=="float":
if not value: return 0
return float(value)
elif fieldType=="boolean":
if not value: return 0
return 1
elif fieldType.find("link to ")==0:
objectName=fieldType.split()[-1].split('.')[0]
if not value or not int(value): return None
return dbroot[objectName]['id'][int(value)]
elif fieldType.find("list of links to ")==0:
if not value: return []
objectName=fieldType.split()[-1].split('.')[0]
if type(value)!=type([]): value=[value]
res=[]
for item in value: res.append(decodeValue("link to "+objectName, item))
return res
else: raise "ERROR: fieldType not implemented: %s"%fieldType
def notEmpty(object, fieldName, tuneMap):
if not getattr(object, fieldName): return "Missing"
return ''
def sortOnAttribute(objectList, attribute, reverse=0):
def s(i1, i2, attribute=attribute):
if getattr(i1, attribute)>getattr(i2, attribute): return 1
else: return -1
objectList.sort(s)
if reverse: objectList.reverse()
def removeFromUrl(url, paramName):
i=url.find('&%s='%paramName)
if i!=-1:
j=url.find('&', i+1)
if j==-1: return url[:i] # case "http://domain?....&a=b
else: return url[:i]+url[j:] # case "http://domain?...&a=b&...
else:
i=url.find('?%s='%paramName)
if i!=-1:
j=url.find('&', i)
if j==-1: return url[:i] # case "http://domain?a=b"
else: return url[:i+1]+url[j+1:] # case "http://domain?a=b&..."
return url
def addToUrl(url, paramName, paramValue):
url=removeFromUrl(url, paramName)
if url.find('?')!=-1: c='&'
else: c='?'
return url+'%s%s=%s'%(c, paramName, paramValue)
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