node.js 了解猫鼬 [Schema.Types.Mixed]
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understanding mongoose [Schema.Types.Mixed]
提问by cathy.sasaki
Is the below schema defined correctly or does writingneed to be
writing: [Schema.Types.Mixed]orwriting: [{}]?
以下架构是否正确定义或确实writing需要是
writing: [Schema.Types.Mixed]或writing: [{}]？
That is, if you have an array of dictionaries -- [{},{},{}] -- one can't predefine the internal structure unless you create another schema and embed it. Is that the right interpretation of the docs?
也就是说，如果您有一系列字典 -- [{},{},{}] -- 除非您创建另一个架构并将其嵌入，否则无法预定义内部结构。这是对文档的正确解释吗？
http://mongoosejs.com/docs/schematypes.html
http://mongoosejs.com/docs/schematypes.html
var blogSchema = new mongoose.Schema({
title: String,
writing: [{
post: String,
two: Number,
three : Number,
four : String,
five : [{ a: String,
b : String,
c : String,
d: String,
e: { type: Date, default: Date.now },
}]
}],
});
Thanks.
谢谢。
回答by JohnnyHK
That schema is fine. Defining an object within an array schema element is implicitly treated as its own Schemaobject. As such they'll have their own _idfield, but you can disable that by explicitly defining the schema with the _idoption disabled:
那个架构很好。在数组架构元素中定义一个对象被隐式地视为它自己的Schema对象。因此，他们将拥有自己的_id字段，但您可以通过使用_id禁用选项显式定义架构来禁用它：
var blogSchema = new mongoose.Schema({
title: String,
writing: [new Schema({
post: String,
two: Number,
three : Number,
four : String,
five : [new Schema({
a: String,
b: String,
c: String,
d: String,
e: { type: Date, default: Date.now },
}, {_id: false})]
}, {_id: false})],
});
