def metadata(self, n, quick=False):
"""
Para obtener definicion de una tabla de la base de datos, a partir de un fichero XML.
El nombre de la tabla corresponde con el nombre del fichero mas la extensión ".mtd"
que contiene en XML la descripción de la tablas. Este método escanea el fichero
y construye/devuelve el objeto FLTableMetaData correspondiente, además
realiza una copia de estos metadatos en una tabla de la misma base de datos
para poder determinar cuando ha sido modificados y así, si es necesario, reconstruir
la tabla para que se adapte a la nuevos metadatos. NO SE HACEN
CHEQUEOS DE ERRORES SINTÁCTICOS EN EL XML.
IMPORTANTE :Para que estos métodos funcionen correctamente, es estrictamente
necesario haber creado la base de datos en PostgreSQL con codificación
UNICODE; "createdb -E UNICODE abanq".
@param n Nombre de la tabla de la base de datos de la que obtener los metadatos
@param quick Si TRUE no realiza chequeos, usar con cuidado
@return Un objeto FLTableMetaData con los metadatos de la tabla solicitada
"""
util = FLUtil()
if not n:
return None
if isinstance(n, str):
if not n or not self.db_.dbAux():
return None
ret = False
acl = False
key = n
stream = None
isSysTable = (n[0:3] == "sys" or self.isSystemTable(n))
if not isSysTable:
stream = self.db_.managerModules().contentCached("%s.mtd" %
key)
if not stream:
qWarning(
"FLManager : Error al cargar los metadatos para la tabla %s"
% n)
return None
# if not key:
# key = n
if not isSysTable:
for fi in self.cacheMetaData_:
if fi.name() == key:
ret = fi
break
else:
for fi in self.cacheMetaDataSys_:
if fi.name() == key:
ret = fi
break
if not ret:
if isSysTable:
stream = self.db_.managerModules().contentCached("%s.mtd" %
n)
if not stream:
qWarning("FLManager : " + util.tr(
"Error al cargar los metadatos para la tabla %s" %
n))
return None
doc = QDomDocument(n)
if not util.domDocumentSetContent(doc, stream):
qWarning("FLManager : " + util.tr(
"Error al cargar los metadatos para la tabla %s" % n))
return None
docElem = doc.documentElement()
ret = self.metadata(docElem, quick)
if not ret:
return None
if not isSysTable and not ret.isQuery():
self.cacheMetaData_.append(ret)
elif isSysTable:
self.cacheMetaDataSys_.append(ret)
else:
acl = self._prj.acl()
if ret.fieldsNamesUnlock():
ret = FLTableMetaData(ret)
if acl:
acl.process(ret)
if not quick and not isSysTable and self._prj.consoleShown(
) and not ret.isQuery() and self.db_.mismatchedTable(n, ret):
msg = util.translate(
"application",
"La estructura de los metadatos de la tabla '%1' y su estructura interna en la base de datos no coinciden.\n"
"Debe regenerar la base de datos.").replace("%1", n)
logger.warn(msg)
# throwMsgWarning(self.db_, msg)
return ret
else:
# QDomDoc
name = None
q = None
a = None
ftsfun = None
v = True
ed = True
cw = False
dl = False
no = n.firstChild()
while not no.isNull():
e = no.toElement()
if not e.isNull():
if e.tagName() == "field":
no = no.nextSibling()
continue
if e.tagName() == "name":
name = e.text()
no = no.nextSibling()
continue
if e.tagName() == "query":
q = e.text()
no = no.nextSibling()
continue
if e.tagName() == "alias":
a = auto_qt_translate_text(e.text())
a = util.translate("Metadata", a)
no = no.nextSibling()
continue
if e.tagName() == "visible":
v = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "editable":
ed = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "concurWarn":
cw = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "detectLocks":
dl = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "FTSFunction":
ftsfun = (e.text() == "true")
no = no.nextSibling()
continue
no = no.nextSibling()
tmd = FLTableMetaData(name, a, q)
cK = None
assocs = []
tmd.setFTSFunction(ftsfun)
tmd.setConcurWarn(cw)
tmd.setDetectLocks(dl)
no = n.firstChild()
while not no.isNull():
e = no.toElement()
if not e.isNull():
if e.tagName() == "field":
f = self.metadataField(e, v, ed)
if not tmd:
tmd = FLTableMetaData(name, a, q)
tmd.addFieldMD(f)
if f.isCompoundKey():
if not cK:
cK = FLCompoundKey()
cK.addFieldMD(f)
if f.associatedFieldName():
assocs.append(f.associatedFieldName())
assocs.append(f.associatedFieldFilterTo())
assocs.append(f.name())
no = no.nextSibling()
continue
no = no.nextSibling()
tmd.setCompoundKey(cK)
aWith = None
aBy = None
for it in assocs:
if not aWith:
aWith = it
continue
if not aBy:
aBy = it
continue
if not tmd.field(it):
continue
tmd.field(it).setAssociatedField(tmd.field(aWith), aBy)
if q and not quick:
qry = self.query(q, tmd)
if qry:
fL = qry.fieldList()
table = None
field = None
fields = tmd.fieldsNames()
# .split(",")
fieldsEmpty = (not fields)
for it in fL:
pos = it.find(".")
if pos > -1:
table = it[:pos]
field = it[pos + 1:]
else:
field = it
# if not (not fieldsEmpty and table == name and fields.find(field.lower())) != fields.end():
# print("Tabla %s nombre %s campo %s buscando en %s" % (table, name, field, fields))
# if not fieldsEmpty and table == name and (field.lower() in fields): Asi esta en Eneboo, pero incluye campos repetidos
if not fieldsEmpty and (field.lower() in fields):
continue
mtdAux = self.metadata(table, True)
if mtdAux:
fmtdAux = mtdAux.field(field)
if mtdAux:
isForeignKey = False
if fmtdAux.isPrimaryKey(
) and not table == name:
fmtdAux = FLFieldMetaData(fmtdAux)
fmtdAux.setIsPrimaryKey(False)
fmtdAux.setEditable(False)
# newRef = (not isForeignKey)
fmtdAuxName = fmtdAux.name().lower()
if fmtdAuxName.find(".") == -1:
# fieldsAux = tmd.fieldsNames().split(",")
fieldsAux = tmd.fieldsNames()
# if not fieldsAux.find(fmtdAuxName) == fieldsAux.end():
if fmtdAuxName not in fieldsAux:
if not isForeignKey:
FLFieldMetaData(fmtdAux)
# fmtdAux.setName("%s.%s" % (table, field))
# if newRef:
# fmtdAux.ref()
tmd.addFieldMD(fmtdAux)
del qry
acl = self._prj.acl()
if acl:
acl.process(tmd)
return tmd
def metadata(self, n, quick=False):
util = FLUtil()
if not n:
return None
if isinstance(n, str):
if not n or not self.db_.dbAux():
return None
ret = False
acl = False
key = n
stream = None
isSysTable = (n[0:3] == "sys" or self.isSystemTable(n))
if not isSysTable:
stream = self.db_.managerModules().contentCached("%s.mtd" %
key)
if not stream:
qWarning(
"FLManager : Error al cargar los metadatos para la tabla %s"
% n)
return None
# if not key:
# key = n
if not isSysTable:
for fi in self.cacheMetaData_:
if fi.name() == key:
ret = fi
break
else:
for fi in self.cacheMetaDataSys_:
if fi.name() == key:
ret = fi
break
if not ret:
if isSysTable:
stream = self.db_.managerModules().contentCached("%s.mtd" %
n)
if not stream:
qWarning("FLManager : " + util.tr(
"Error al cargar los metadatos para la tabla %s" %
n))
return None
doc = QDomDocument(n)
if not util.domDocumentSetContent(doc, stream):
qWarning("FLManager : " + util.tr(
"Error al cargar los metadatos para la tabla %s" % n))
return None
docElem = doc.documentElement()
ret = self.metadata(docElem, quick)
if not ret:
return None
if not isSysTable and not ret.isQuery():
self.cacheMetaData_.append(ret)
elif isSysTable:
self.cacheMetaDataSys_.append(ret)
else:
acl = self._prj.acl()
if ret.fieldsNamesUnlock():
ret = FLTableMetaData(ret)
if acl:
acl.process(ret)
if not quick and not isSysTable and self._prj.consoleShown(
) and not ret.isQuery() and self.db_.mismatchedTable(n, ret):
msg = util.tr(
"La estructura de los metadatos de la tabla '%1' y su "
"estructura interna en la base de datos no coinciden. "
"Debe regenerar la base de datos.").arg(n)
throwMsgWarning(self.db_, msg)
return ret
else:
#QDomDoc
name = None
q = None
a = None
ftsfun = None
v = True
ed = True
cw = False
dl = False
no = n.firstChild()
while not no.isNull():
e = no.toElement()
if not e.isNull():
if e.tagName() == "field":
no = no.nextSibling()
continue
if e.tagName() == "name":
name = e.text()
no = no.nextSibling()
continue
if e.tagName() == "query":
q = e.text()
no = no.nextSibling()
continue
if e.tagName() == "alias":
a = auto_qt_translate_text(e.text())
a = util.translate("Metadata", a)
no = no.nextSibling()
continue
if e.tagName() == "visible":
v = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "editable":
ed = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "concurWarn":
cw = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "detectLocks":
dl = (e.text() == "true")
no = no.nextSibling()
continue
if e.tagName() == "FTSFunction":
ftsfun = (e.text() == "true")
no = no.nextSibling()
continue
no = no.nextSibling()
tmd = FLTableMetaData(name, a, q)
cK = None
assocs = []
tmd.setFTSFunction(ftsfun)
tmd.setConcurWarn(cw)
tmd.setDetectLocks(dl)
no = n.firstChild()
while not no.isNull():
e = no.toElement()
if not e.isNull():
if e.tagName() == "field":
f = self.metadataField(e, v, ed)
if not tmd:
tmd = FLTableMetaData(name, a, q)
tmd.addFieldMD(f)
if f.isCompoundKey():
if not cK:
cK = FLCompoundKey()
cK.addFieldMD(f)
if f.associatedFieldName():
assocs.append(f.associatedFieldName())
assocs.append(f.associatedFieldFilterTo())
assocs.append(f.name())
no = no.nextSibling()
continue
no = no.nextSibling()
tmd.setCompoundKey(cK)
aWith = None
aBy = None
for it in assocs:
if not aWith:
aWith = it
continue
if not aBy:
aBy = it
continue
tmd.field(it).setAssociatedField(tmd.field(aWith), aBy)
if q and not quick:
qry = self.query(q, tmd)
if qry:
fL = qry.fieldList()
table = None
field = None
fields = tmd.fieldsNames().split(",")
fieldsEmpty = (not fields)
for it in fL:
pos = it.find(".")
if pos > -1:
table = it[:pos]
field = it[:pos]
else:
field = it
if not (not fieldsEmpty and table == name and
fields.find(field.lower())) == fields.end():
continue
mtdAux = self.metadata(table, True)
if mtdAux:
fmtdAux = mtdAux.field(field)
if mtdAux:
isForeignKey = False
if fmtdAux.isPrimaryKey(
) and not table == name:
fmtdAux = FLFieldMetaData(fmtdAux)
fmtdAux.setIsprimaryKey(False)
fmtdAux.setEditable(False)
newRef = (not isForeignKey)
fmtdAuxName = fmtdAux.name().lower()
if fmtdAuxName.find(".") == -1:
fieldsAux = tmd.fieldsNames().split(",")
if not fieldsAux.find(
fmtdAuxName) == fieldsAux.end():
if not isForeignKey:
fmdtAux = FLFieldMetaData(fmtdAux)
fmtdAux.setName("%s.%s" %
(tambe, field))
newRef = False
if newRef:
fmtdAux.ref()
tmd.addFieldMD(fmtdAux)
qry.deleteLater()
acl = self._prj.acl()
if acl:
acl.process(tmd)
return tmd
