如何将多条记录添加到谷歌应用程序引擎数据存储中
我正在尝试通过上传格式化文件（包含多行）来更新数据存储。文件中的每一行都会在 Google App Engine 数据存储中创建一条新记录。我不确定如何在 for 循环中将多行添加到数据存储中。我尝试过：
class Records(db.Model):
something = db.StringProperty()
.....
for line in lines #lines is a file contains multiple lines
record = Records(parent = PARENT_KEY)
record.something = line
record.put()
它不起作用，错误消息是 BadValueError：属性某物不是多行。我猜测这是因为“记录”变量在每次迭代中引用相同的实例。
抱歉，如果这是一个愚蠢的问题。我对 python 和谷歌应用程序引擎很陌生。预先感谢您的意见！
I am trying to update a datastore by uploading a formatted file(contains multiple lines). Each line in the file will create a new record in google app engine datastore. I am not sure how to add multiple rows to the datastore within a for loop. I tried:
class Records(db.Model):
something = db.StringProperty()
.....
for line in lines #lines is a file contains multiple lines
record = Records(parent = PARENT_KEY)
record.something = line
record.put()
It doesn't work and the error message is BadValueError: Property something is not multi-line. I am guessing it's because the 'record' variable refer to the same instance across each iteration.
Sorry if it's a stupid question. I am pretty new to python and google app engine. Thanks in advance for your input!
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for line inlines会将换行符保留在行尾； StringProperty 中不允许使用换行符，除非将其指定为多行。尝试
record.something = line.rstrip()删除换行符。for line in lineswill keep the newline characters at the end of the lines; newlines aren't allowed in a StringProperty unless it's designated as multiline.try
record.something = line.rstrip()to remove the newlines.您可以使用批量加载器将文件中的数据加载到数据存储中。
http://code.google.com/appengine/docs/python/tools /uploadingdata.html
You can use the bulk loader to load data from a file into the datastore.
http://code.google.com/appengine/docs/python/tools/uploadingdata.html