我有一个包含这些集合的mongoDb数据库
collection: Category
{
id:
catnumber:
nameNL:
nameFR:
subcategories:[id:, nameNL:, nameFR]
products:[id,nameNL,nameFR]
}
Collection: Product
{
id:
nameNL:
nameFR:
descriptionNL:
descriptionFR:
code1:
code2:
categories:[id:,nameNl:,nameFR]
image:
}
如你所见,我对字段进行了非规范化。现在我无法弄清楚如何将它与mongoose模式联系起来。
我有这个,但这似乎不对:
var Schema = mongoose.Schema;
var ProductSchema = new Schema({
_id: Number,
nameNL: String,
nameFR:String,
descriptionNL:String,
descriptionFR:String,
code1:String,
code2:String,
categories: [CategorySchema._id,CategorySchema.nameNL,CategorySchema.nameFR]
});
var CategorySchema = new Schema({
_id:Number,
catNumber: String,
nameNL: String,
nameFR:String,
subcategories:[CategorySchema.nameNL,CategorySchema.nameFR],
products:[ProductSchema._id,ProductSchema.nameNL,ProductSchema.nameFR]
});
我的非规范化是错误的吗?(应用程序需要获取categoryname& productname很多,这就是为什么我反规范化了)
答案 0 :(得分:1)
你的猫鼬语法有点偏。试试这个(下面):
请注意,我已建议删除根架构的_id
字段。 Mongo将自动生成_id
字段,类型为ObjectId
,可以派上用场。如果您愿意,可以使用_id: Number
来覆盖此选项,但如果您有充分的理由,我建议您这样做。
var Schema = mongoose.Schema;
var ProductSchema = new Schema({
nameNL: String,
nameFR: String,
descriptionNL: String,
descriptionFR: String,
code1: String,
code2: String,
categories: [{
_id: { type: Schema.Types.ObjectId, ref: 'Category' },
nameNL: String,
nameFR: String
}]
});
var CategorySchema = new Schema({
catNumber: String,
nameNL: String,
nameFR: String,
subcategories: [{
_id: { type: Schema.Types.ObjectId, ref: 'Category' },
nameNL: String,
nameFR: String
}],
products: [{
_id: { type: Schema.Types.ObjectId, ref: 'Product' },
nameNL: String,
nameFR: String
}]
});