大约有 596 项符合查询结果（耗时：0.0179秒） [XML]
sqlalchemy: how to join several tables by one query?
...om"
).all()
One note about that...
query.join(Address, User.id==Address.user_id) # explicit condition
query.join(User.addresses) # specify relationship from left to right
query.join(Address, User.addresses) # same, with explicit target
query.join('addresses') ...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...2022年3月8日
开源协议：免费开源扩展
文档最后更新：2025年11月18日
您的改进建议 联系方式： 不需要回复的可留空~ 意见反馈（300字以内）： 给个鼓励也行呐~o~ ...
How to convert JSON to CSV format and store in a variable
...,description,link,timestamp,image,embed,language,user,user_image,user_link,user_id,geo,source,favicon,type,domain,id
"Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)","Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s ca...
File Hash 扩展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希 ·...
...h-extension/54089
发布日期：2022年3月22日
文档最后更新：2025年11月18日
您的改进建议 联系方式： 不需要回复的可留空~ 意见反馈（300字以内）： 给个鼓励也行呐~o~ ...
Naming of ID columns in database tables
...
Kevin, same as you. for example: user_id, role_id for PKey, and role_user_id for FKey. It is good on a large scale project. Because if all ID field are named to "id", it is too confuse. But i think it is personal preference, somebody think only use "id" are ...
Sequelize.js: how to use migrations and sync
...
email: 'bob@bob.com'
.success (user) ->
console.log 'added user'
user_id = user.id
myTable = [
field1: 'womp'
field2: 'rat'
subModel: [
field1: 'womp'
,
field1: 'rat'
]
]
Remember to take your sync() out of index in your models or it will overwrite w...
What's the difference between identifying and non-identifying relationships?
... @Eugene, yes I would expect that to be a non-identifying relationship. user_id should be the primary key by itself, and updated_by is not part of a multi-column primary key.
– Bill Karwin
Jul 29 '11 at 14:18
...
Rails: Default sort order for a rails model?
...7 separate queries.
You can use a passed in parameter such as a date or a user_id (something that will change at run-time and so will need that 'lazy evaluation', with a lambda, like this:
scope :recent_books, lambda
{ |since_when| where("created_at >= ?", since_when) }
# Note the `where` ...
SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
... 版本
日期
修改内容
1.0
2025-10-09
初始版本
工作原理
前台服务
Android 限制后台应用的活动以节省电池。要在后台持续运行，应用必须启动前台服务...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
报错信息：
3月 04, 2025 9:50:11 上午 com.google.appengine.tools.development.ApiProxyLocalImpl log
严重: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract long com.google.appinv...