花费 575ms 找到2420582条记录
1 'RealmNoticeModelClass' has a primary key, use 'createObject(Class<E>, Object)' instead
2016年10月18 - : 'RealmNoticeModelClass' has a primary key, use 'createObject(Class<E>, Object)' instead
2 'User' has a primary key, use 'createObject(Class<E>, Object)' instead
2016年12月08 - 外。 io.realm.exceptions.RealmException: 'User' has a primary key, use 'createObject(Class<E>, Object)' instead. at io.realm.Realm.createObjectInternal(Realm.java
3 When to use one field as primary key instead of 2?
2012年12月20 - : 我有以下问题: In Case 1: Why not use UserName field as primary key (PK)? why use another filed likes id [which is auto increased] as PK? In case of just
4 AttributeError: 'TaggableManager' object has no attribute 'primary_key'
2014年01月21 - , in get_attribute value = getattr(value, part) AttributeError: 'TaggableManager' object has no attribute 'primary_key' And this is models.py for the application
5 Why does ArrayList use Object[] (instead of E[]) internally? [duplicate]
2014年09月05 - use E[] instead Object[], in method get(int) the cast isn't necessary. This will increase performance (apparently). 如果ArrayList使用E[]代替Object[],则在方法get
6 JPA entity has no primary key?
2014年01月28 - : 我得到以下错误: Entity class [class cdot.oss.cmsat.conf.ejb.entity.CmcMapServerInfo] has no primary key specified. I read online and found out that entities
7 Can I use AR object as hash key or should I use object_id instead
2013年01月11 - Because of Ruby awesomeness it is possible to use any object as key 由于Ruby的强大,可以使用任何对象作为键。 document = Document.find 1 o = Hash.new o[1] = true o
8 Use email address as primary key?
2010年09月27 - than integer comparison. 我们的web应用程序需要电子邮件地址在系统中是唯一的。所以,我想用电子邮件地址作为主键。然而,我的同事建议,字符串比较将比整数比较慢。 Is it a valid reason to not use email as primary key? 不使
9 Referring to an object in the URL - do you use primary key or what is the best practice?
2013年12月12 - I want to refer to some instance of a data through my URL. What is the recommended way to do that? Should I use the primary key of that data
10 whether to use a single primary key or composite primary key?
2013年05月31 - I am designing a project based database for the first time and need some advice on how best to determine whether to use a single primary key

 
© 2014-2018 ITdaan.com 粤ICP备14056181号