我正在使用Peewee和PyMySQL,并且当我尝试使用blob
模块中的CompressedField
时,我被困在64k playhouse
尺寸上...
以下代码为我提供了第二次测试的截断数据
from peewee import *
from playhouse.db_url import connect
from playhouse.fields import CompressedField
db = connect("mysql://me:pass@IP/test_db")
class Compress(Model):
name = CharField()
cmprssd_data = CompressedField()
class Meta:
database = db
db.connect()
db.create_tables([Compress], safe=True)
short_str = "".zfill(200)
di_test1 = {"name": "first", "cmprssd_data": short_str }
test1 = Compress(**di_test1)
test1.save()
long_str = "".zfill(200000000)
di_test2 = {"name": "second", "cmprssd_data": long_str }
test2 = Compress(**di_test2)
test2.save()
我尝试在MySQL和pymysql中将'max_allowed_packet'
更新为1073741824
,但这并没有改变任何内容。
顺便说一句,正如我认为同样的问题,使用long_str
和PickledField
会给我一个管道错误。
有没有办法让peewee与longblob
合作? (或问题来自其他地方?)
我还找到了thread on the broken pipe problem with pymysql,但我不知道怎么告诉Peewee模型在那个特定的领域做大块的东西......
答案 0 :(得分:0)
这可以通过custom field:
来完成from peewee import *
from playhouse.fields import CompressedField
# tell database that the longblob column type exists
db = MySQLDatabase('test', host='127.0.0.1', user='root',
fields={'longblob': 'longblob'})
# create a custom field, in this case subclassing the existing field
class LongCompressedField(CompressedField):
db_field = 'longblob' # <-- this matches our dictionary key above
class MyModel(Model):
val = LongCompressedField()
class Meta:
db_table = 'test'
database = db
db.connect()
db.create_table(MyModel, safe=True)
m = MyModel(val=''.zfill(200000000))
m.save()