def convertTable(self):
self._checkForNecessaryFields()
if sql_helpers.isTableAre(self.sq_connection, self.dst):
dst_id = sql_helpers.getIdForTable(self.sq_connection, self.dst)
else:
dst_id = 1
self.createDstTable()
try:
for rec in sql_helpers.selectHashIterator(self.sq_connection.execute("select * from {0}".format(self.src))):
try:
sql_helpers.insertInto(self.sq_connection, self.dst, self._processAndAddIDReferences(dst_id, rec))
except:
self.sq_connection.execute("delete from {0} where ref_id = ?".format(self.dst), (rec["id"],))
sql_helpers.insertInto(self.sq_connection, self.dst, self._processAndAddIDReferences(dst_id, rec))
dst_id += 1
except:
self.sq_connection.rollback()
raise
else:
self.sq_connection.commit()
def processTable(self, table_name):
"""processes table table_name if any file is assigned to it"""
if self.sq_connection.execute("select * from processed_files where table_name = '{0}'".format(table_name)).fetchall() == [] :
raise Exception("there is no files attached to table {0}".format(table_name))
files_list = map(lambda a: a[0], self.sq_connection.execute("select full_path from processed_files where table_name = '{0}' and processed = 0".format(table_name)).fetchall())
if files_list == []:
log.log("no one file assigned to table {0}".format(table_name))
if not sql_helpers.isTableAre(self.sq_connection, table_name):
#таблицы еще нет в базе - создаем, узнаем типы и имена полей из дбф файлов, проверяем соответствия полей типам
for filename in files_list:
log.log("reading structure of {0}".format(filename))
dbfcon = ydbf.open(filename, encoding = self.encoding)
if not vars().has_key("fields"): # если еще не поеределили переменную
fields = {} # тут храним имена и типы полей, которые будем создавать
for field in dbfcon.fields:
fields[field[0]] = [field[1], field[3]]
else: # переменная уже определена, если встретятся поля с другим типом - выбросим исключение
for field in dbfcon.fields:
if fields.has_key(field[0]):
if fields[field[0]] != [field[1], field[3]]:
raise Exception("file {file} has field {field} with type {type1}, another fields in another files has type {type2}".format(file = filename, field = field[0], type1 = field[1], type2 = fields[field[0]]))
else:
fields[field[0]] = [field[1], field[3]]
dbfcon.close()
# теперь надо создать таблицу в базе
def mapdatatype(a): # отображение типов из dbf в типы sqlite3
if a[0] == 'C':
return "text"
elif a[0] == 'D':
return "date"
elif a[0] == 'N' and a[1]:
return "decimal"
elif a[0] == 'N' and not a[1]:
return "integer"
elif a == 'L':
return "bool"
else:
raise Exception("can not create field with type {0}".format(a))
for field in fields:
fields[field] = mapdatatype(fields[field])
sql_helpers.makeTableIfNotExists(self.sq_connection, table_name, fields)
sql_helpers.makeTableIfNotExists(self.sq_connection, "file_assigns", {"file_id" : "integer", "record_id": "integer"}, ["foreign key (file_id) references processed_files(id) on delete cascade", "unique(file_id, record_id)"])
#таблица существует - заносим в нее данные из файлов
table_id = sql_helpers.getIdForTable(self.sq_connection, table_name)
assign_id = sql_helpers.getIdForTable(self.sq_connection, "file_assigns")
try:
for file_tuple in self.sq_connection.execute("select id, full_path from processed_files where table_name = '{0}' and processed = 0".format(table_name)).fetchall():
log.log("inserting records from {0}".format(file_tuple[1]))
for rec in ydbf.open(file_tuple[1], encoding = self.encoding):
rec["id"] = table_id
sql_helpers.insertInto(self.sq_connection, table_name, rec)
sql_helpers.insertInto(self.sq_connection, "file_assigns", {"id" : assign_id, "file_id" : file_tuple[0], "record_id" : table_id})
table_id += 1
assign_id += 1
self.sq_connection.execute("update processed_files set processed = 1 where id = {0}".format(file_tuple[0]))
except:
self.sq_connection.rollback()
raise
else:
self.sq_connection.commit()
def fetchTable(self):
if not sql_helpers.isTableAre(self.sq_connection, self.table):
raise Exception("{0}.{1}: table {2} does not exists in the database".format(self.__class__.__name__, __name__, self.table))
self.tag = self.table
for rec in sql_helpers.selectHashIterator(self.sq_connection.execute('select * from {0}'.format(self.table))):
self.insertRecord(rec)