2016年8月26日 · a composite attribute is an attribute where the attribute can be broken down further, such as an address can be further broken down to the number, street and town. a derived attribute is an attribute which doesn't need to be stored separately because it can be calculated using another attribute. For example ther is no need to store a persons ...

2012年1月27日 · This <f:attribute> hack is a leftover from JSF 1.0/1.1 when it was not possible to pass objects as additional arguments to command buttons/links. Since JSF 1.2 you are supposed to use <f:setPropertyActionListener> for this.

2015年12月31日 · A relation is in first normal form if the domain of each attribute contains only atomic values, and the value of each attribute contains only a single value from that domain. In other words, you cannot have attributes that: are structured, that is contain components, or; are repeated (or both). So, att1 and class2 must be substituted by their ...

2011年10月18日 · Sorry for reviving an old thread To anyone who struggles with actions in composite components like I did: If you make the method-signature like this: method-signature="void action([Ljava.lang.Object;)" then you will be able to pass in one page a method with one argument, in another page - a method with two arguments, etc.

2012年2月6日 · I am having trouble in using a JSF composite-component in the right way. I put some components together and everything was working. Then I just extracted the code to a composite-component, and passed the corresponding attributes and suddenly I am getting conversation exceptions.

2017年6月25日 · I need to make column 'full_name' as composite column of columns 'first_name' and 'last_name' in MySQL. I can do the same in MS SQL using following syntax : create table customer ( first_name varchar(100) , last_name varchar(100) , full_name AS first_name + last_name ) How can I do the same in MySQL. Any suggestions?

2018年2月14日 · Composite Component, attribute of type java.util.List is always null. Ask Question Asked 6 years, 11 ...

If this is not what you want and you really want to pass it from the composite component side on, then I can think of two ways of passing extra arguments: using <f:attribute> with an action listener to pass it as an attidional component attribute, or <f:setPropertyActionListner> to let JSF set it as a property right before the action is invoked ...

2017年4月14日 · Note: I am aware of the symbol for associative entity, in such a symbol, one may have an auto-increment key as the PK, but then again, one may use the 2 FKs. In the later case, the PK would be composite. I don't know how to show it since Chen attribute symbol is an oval for each attribute. Thanks.

2017年4月14日 · I have the entity Person, which has the attribute "address". The attribute address, has the attribute "street name" and "zip code". Now, I am asked to make a UML Diagram, but I have no clue on how to make this when I have an attribute of an attribute. I have this already: Person. ID << PK >> Address: string