1
我有一個Grails應用程序,它爲域模型使用了持久性註釋的POJO。 Grails按預期從它們生成控制器和視圖,但是一個類對我來說是一個難題。如何在POJO中表示要在Grails視圖中顯示爲select的集合
我需要表示一個字符串集合(此時是一個字符串ArrayList),它是grails-view'friendly',並將呈現爲一個下拉列表。
ArrayList中的數據是'相當'不變的,所以我認爲枚舉可以用於它,但我只是不確定。
有問題的類:
/**
* available categories:
* Airplane
* Rotorcraft
* Glider
* Lighter than air
* Powered lift
* Powered parachute
* Weight-shift-control
*/
@Entity
public class AircraftCategory {
public AircraftCategory(){
this.aircraftCategories.add("Airplane");
this.aircraftCategories.add("Rotorcraft");
this.aircraftCategories.add("Glider");
this.aircraftCategories.add("Lighter Than Air");
this.aircraftCategories.add("Powered Lift");
this.aircraftCategories.add("Powered Parachute");
this.aircraftCategories.add("Weight Shift Control");
}
long id;
private long version;
private ArrayList <String> aircraftCategories = new ArrayList<String>();
public ArrayList <String> getAircraftCategories() {
return aircraftCategories;
}
public void setAircraftCategories(ArrayList <String> aircraftCategories) {
this.aircraftCategories = aircraftCategories;
}
@Id
@GeneratedValue
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public long getVersion() {
return version;
}
public void setVersion(long version) {
this.version = version;
}
}
...確實好點,我正在考慮這兩個問題,但挑戰依然存在;-) – vector 2012-07-09 17:56:25
我會大量遊說讓'AircraftCategory'成爲一個實際的域類,因爲它不會在類別中硬編碼,而是使它們成爲數據。如果需要,您可以引導類別。 – cdeszaq 2012-07-09 18:00:00
...是的,我的情緒正是如此。 – vector 2012-07-09 18:29:11