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How to avoid saving a blank model which attributes can be blank
I have two models with a HABTM association, let´s say book and author. class Book has_and_belongs_to_many :authors[详细]
2022-12-27 17:35 分类：问答Legend in Flex Charts
How can i make the Legend Horizontal or Ver开发者_C百科tical. <mx:Legend direction=\"horizontal\"...[详细]
2022-12-27 14:29 分类：问答Best VS2010 Extensions [closed]
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references,or expertise, but this question will likely solicit debate, a[详细]
2022-12-27 13:48 分类：问答Require help with program for edutainment game
I am working on a factorisation problem and for small numbers it is working well. I\'ve been able to calculate the factors (getting the answers from Wolfram Alpha) for small numbe开发者_运维百科rs, li[详细]
2022-12-27 13:08 分类：问答New or not so well-known paradigms, syntax features and behaviours of programming languages?
I\'ve designed some educational programming languages and interpreters for them, but my problem always was that they ended up \"normal\" and \"boring\", mostly similar to some kind of existing languag[详细]
2022-12-27 10:44 分类：问答曝袁立登记结婚 第三任老公身份揭秘诗人80后颜值高？
近日网络上曝出袁立已经结婚的消息，而袁立本人刚开始表示有点惊讶，不过后来还是大方的承认已经和梁太平结婚。她在社交媒体上发了一段圣经中的经文，大意说既然已经结婚夫妻就是一体，本来她并不想公开自己结婚的事[详细]
2022-12-27 08:09 分类：问答Conditionally set a column to its default value in Postgres
I\'ve got a PostgreSQL 8.4 table with an auto-increment开发者_运维知识库ing, but nullable, integer column. I want to update some column values and, if this column is NULL then set it to its default va[详细]
2022-12-27 05:48 分类：问答Using php's magic function inside another function does not work
I want to use magic function __set() and __get() for storing SQL data inside a php5 class and I get some strange issue using them inside a function:[详细]
2022-12-27 04:48 分类：问答光之守望2021角色强度排行榜指南：2021角色强度介绍？
轻看2021角色实力排名介绍。感兴趣的朋友可以先看看具体的介绍。这样，我们就知道谁是最好的，也带来一些英雄的推荐。先来看看轻表2021角色实力介绍。[详细]
2022-12-26 22:11 分类：问答一诺千金下一句是什么啊？？
秋叶飘飘TY 开发者_开发百科 2022-03-31 07:56 要看容量的、一般车载家用50L的220左右、大概可以放60瓶左右的易拉罐。海钓96升的最佳、月450的样子。百度百科里白色那款160L的800。也是目前全球最大的，没有比这[详细]
2022-12-26 21:52 分类：问答
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