我有两个public class Category extends RealmObject {
@PrimaryKey
private int categoryId;
private String name;
public String getName() {
return name;
}
public int getCategoryId() {
return categoryId;
}
public void setName(String name) {
this.name = name;
}
public void setCategoryId(int categoryId) {
this.categoryId = categoryId;
}
}
模型。
分类
public class Event extends RealmObject {
@PrimaryKey
private int eventId;
private String title;
private Category category;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public int getEventId() {
return eventId;
}
public void setEventId(int eventId) {
this.eventId = eventId;
}
public Category getCategory() {
return category;
}
public void setCategory(Category category) {
this.category = category;
}
}
事件
[
{
"categoryId": 1,
"name": "Category 1"
},
{
"categoryId": 2,
"name": "Category 2"
}
...
]
我使用两个不同的请求从Web服务获取数据：
类别回复
[
{
"eventId": 0,
"title": "Event 0",
"category": {
"categoryId": 1,
"name": null
}
},
{
"eventId": 1,
"title": "Event 1",
"category": {
"categoryId": 2,
"name": null
}
}
]
活动回复
categories因此，在映射和保存数据后，我得到所有realm.where(Category.class).findAll();
categories返回一些//0
categoryId = 0
name = "Category 0"
//1
categoryId = 1
name = "Category 1"
//2
categoryId = 2
name = "Category 2"
//3
categoryId = 3
name = "Category 3"
events获取所有realm.where(Event.class).findAll();
events返回一些//0
Event = [{eventId:0},{title:Event 0},{category:[{categoryId:1},{name:null}]}]
eventId = 0
title = "Event 0"
category = {
categoryId = 1
name = null
}
//1
Event = [{eventId:1},{title:Event 1},{category:[{categoryId:2},{name:null}]}]
eventId = 1
title = "Event 1"
category = {
categoryId = 2
name = null
}
Name Category中的字段category为空。那么，我怎样才能获得其他Realm字段（名称）？我认为sql join会返回完整的类别对象，但不会。我需要一些喜欢index的人吗？可以不改变模型结构吗？