spring data mongodb更新或刪除子元素為陣列的資料
阿新 • • 發佈:2018-12-24
專案中用spring data mongodb,當一個類中有一個list集合(即陣列元素)時,刪除和修改這個元素的資料困擾了我好久,各種百度都搜不到(真心覺得百度很垃圾),後來在谷歌搜到了答案,記錄如下:
實體類如下:
package com.weixinplatform.wxwebserver.collection.template; import java.util.List; import java.util.Set; /** * Created by jihb on 15/5/6. */ public class ViewTemplate { private String id;private String name;//模本名稱 private String desc;//描述 private String type;//模本型別 //模板介面 List<Template> template; public static class Template{ private String id; private String view;//檢視名稱 private String image;//圖片路徑 public String getId() { return id; } public voidsetId(String id) { this.id = id; } public String getView() { return view; } public void setView(String view) { this.view = view; } public String getImage() { return image; } public void setImage(String image) { this.image = image; } } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getDesc() { return desc; } public void setDesc(String desc) { this.desc = desc; } public String getType() { return type; } public void setType(String type) { this.type = type; } public List<Template> getTemplate() { return template; } public void setTemplate(List<Template> template) { this.template = template; } }
mongodb資料庫中的資料如下:
{
"_id": ObjectId("5550622dfc194b340a1feb5f"),
"name": "hsaflkjhdf",
"desc": "dfsafsdafsafad",
"type": "微企模板",
"template": [
{
"_id": ObjectId("5550d3280a706d025d8eb5d6"),
"view": "aaaaaaaaaaa",
"image": "http://127.0.0.1:7012/staticdata/newsdata/template/images/redare/5550622dfc194b340a1feb5f/143136029221214278739681.jpg"
}
]
}
刪除template子元素中的一條記錄
Update update = new Update(); update.pull("template",new BasicDBObject("id",templateId)); Query query = Query.query(Criteria.where("id").is(viewTemplateId)); return db.updateFirst(query,update,ViewTemplate.class);
修改template子元素的某一條滿足條件的記錄
Update update =new Update(); update.set("template.$.view", view); update.set("template.$.image", imagePath); Query query = Query.query(new Criteria().andOperator(Criteria.where("id").is(viewTemplateId),Criteria.where("template").elemMatch(Criteria.where("id").is(templateId)))); return db.updateFirst(query, update, ViewTemplate.class);