[英]Mongoose query to populate list values
如何在列表中填充索引? 假设我有以下架构
const supplierSchema = new mongoose.Schema({
name: String,
address: String,
size: Number,
... (19 other fields)
supplier_id: mongoose.Schema.Types.ObjectId,
});
const itemsSchema = new mongoose.Schema({
name: String,
date_time: {type: Date, default: Date.now},
supplier_id: mongoose.Schema.Types.ObjectId,
item_id: mongoose.Schema.Types.ObjectId,
});
const receiptSchema = new mongoose.Schema({
date_time: {type: Date, default: Date.now},
items: [itemSchema]
receipt_id: mongoose.Schema.Types.ObjectId,
});
const Receipt = mongoose.model('Photo', photoSchema);
我的收据是这样填充的
Receipt.findById(<insertID>) currently gives:
{
receipt_id: ObjectId("..."),
date_time: ISODate("..."),
items: [
{
name: "...",
date_time: ISODate("..."),
supplier_id: ObjectId("..."),
item_id: ObjectId("...")
},
{
name: "...",
date_time: ISODate("..."),
supplier_id: ObjectId("..."),
item_id: ObjectId("...")
}
],
receipt_id: ObjectId("..."),
}
我希望它用name
和address
填充supplier ID
。
您可以使用populate
跨多个级别填充:
Receipt
.findById(<insertID>)
.populate({
path: 'items',
populate: { path: 'supplier_id' }
})
.exec()
更多信息参见官方文档
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