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mongoose
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LearningTech
文档讨论了在不同情况下使用不同方法的最佳实践,并提供了 Mongoose 和 CNodeJS 的链接以获取更详细的信息。
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mongoose
18.
• 如果是 ,使用
方法,如果是 ,使用 方法
21.
http://mongoosejs.com/docs/connections.html https://cnodejs.org/topic/504b4924e2b84515770103dd
Editor's Notes
#4:
Schema生成Model, Model創造Entity, Model和Entity都可對資料庫操作造成影響,但Model比Entity更具操作性。
#5:
//定義一個屬性name,類型為String
#11:
//查詢類似數據
#14:
只有在執行exec方法時才執行查詢,而且必須有回調。
#17:
update第一個參數是查詢條件,第二個參數是更新的對象,但不能更新主鍵,這就是為什麼要刪除主鍵的原因。 PersonModel.update({_id:_id},{$set:{name:'MDragon'}},function(err){});
#19:
如果是Entity,使用save方法,如果是Model,使用create方法 兩種新增方法區別在於,如果使用Model新增時,傳入的對象只能是純淨的JSON對象,不能是由Model創建的實體,原因是:由Model創建的實體krouky雖然打印是只有{name:'krouky'},但是krouky屬於Entity,包含有Schema屬性和Model數據庫行為模型。
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