我想複製多個數據庫中的數據,處理它們,然後將它們移動到主數據庫。所有的數據庫都有相同的模式。Peewee ORM - 複製主數據庫中的多個數據庫中的數據
即使我打開和關閉數據庫,peewee總是連接到同一個數據庫(列表中的第三個),並且不尊重連接順序。
databases = [spie_db, opticsorg_db, phcom_db]
# map to a dictionary the values from the record
def mapping(record):
comp_d = {'name': record.name,
'address': record.address,
'country': record.country,
'website': record.website,
'domain': record.domain
}
return comp_d
def merge_data():
company_list = []
for database in databases:
database.connect()
# cycle trough db
for record in Company.select():
# append each record to the list
company_list.append(mapping(record))
database.close()
return company_list
# get data from the other databases
companies = merge_data()
# the merge database
db.connect()
# add records in the merge db
for company in companies:
Company.create(name=company['name'], address=company['address'], country=company['country'],
website=company['website'], domain=company['domain'])
db.close()