我有以下销售收藏。我想使用mongo shell查询以查找价格超过20的产品详细信息。
[{
"Customer_Info":{
"Customer_Id": 1,
"First_Name": "John",
"Last_Name": "Smith",
"Address": "Sydney",
"State": "Sydney",
"Postcode": "0920",
"Phone": "0143464663"
},
"Order_Info": [
{
"Order_Id": 1,
"Order_Date": "01-01-2020",
"Delivery_Date": "01-01-2020",
"Line_Info": [
{
"Line_Id": 1,
"Line_Price": 100,
"Line_Units_Added": 2,
"Product_Info": {
"Product_Id": 300,
"Product_Name": "Orange",
"Product_Description": "Fruit",
"Number_in_Stock": 50,
"Product_Weight": 1,
"Product_Cost": 300,
"Product_in_Date": "01-01-2020",
"Product_Type": "Fruits",
"Farmer_Info": {
"Farmer_Id": 123,
"Farmer_First_Name": "Drake",
"Farmer_Last_Name": "Levine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
},
{
"Line_Id": 5,
"Line_Price": 25,
"Line_Units_Added": "1",
"Product_Info": {
"Product_Id": 305,
"Product_Name": "Banana",
"Product_Description": "Fruit",
"Number_in_Stock": 100,
"Product_Weight": 1,
"Product_Cost": 100,
"Product_in_Date": "01-01-2020",
"Product_Type": "Fruits",
"Farmer_Info": {
"Farmer_Id": 123,
"Farmer_First_Name": "Drake",
"Farmer_Last_Name": "Levine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
},
{
"Line_Id": 6,
"Line_Price": 100,
"Line_Units_Added": "1",
"Product_Info": {
"Product_Id": 305,
"Product_Name": "Jackfruit",
"Product_Description": "Fruit",
"Number_in_Stock": 20,
"Product_Weight": 1,
"Product_Cost": 50,
"Product_in_Date": "01-01-2020",
"Product_Type": "Fruits",
"Farmer_Info": {
"Farmer_Id": 123,
"Farmer_First_Name": "Drake",
"Farmer_Last_Name": "Levine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
},
{
"Line_Id": 7,
"Line_Price": 200,
"Line_Units_Added": 1,
"Product_Info": {
"Product_Id": 310,
"Product_Name": "Dragon Fruit",
"Product_Description": "Fruit",
"Number_in_Stock": 10,
"Product_Weight": 1,
"Product_Cost": 2,
"Product_in_Date": "01-01-2020",
"Product_Type": "Fruits",
"Farmer_Info": {
"Farmer_Id": 123,
"Farmer_First_Name": "Drake",
"Farmer_Last_Name": "Levine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
}
]
},
{
"Order_Id": 2,
"Order_Date": "01-01-2020",
"Delivery_Date": "01-01-2020",
"Line_Info": [
{
"Line_Id": 2,
"Line_Price": 200,
"Line_Units_Added": 2,
"Product_Info": {
"Product_Id": 301,
"Product_Name": "Mango",
"Product_Description": "Fruit",
"Number_in_Stock": 50,
"Product_Weight": 1,
"Product_Cost": 500,
"Product_in_Date": "01-01-2020",
"Product_Type": "Fruits",
"Farmer_Info": {
"Farmer_Id": 123,
"Farmer_First_Name": "Drake",
"Farmer_Last_Name": "Levine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
}
]
}
]
},{
"Customer_Info":{
"Customer_Id": 2,
"First_Name": "Popeye",
"Last_Name": "Sailorman",
"Address": "Sydney",
"State": "Sydney",
"Postcode": "0920",
"Phone": "123456"},
"Order_Info": [
{
"Order_Id": 3,
"Order_Date": "01-01-2020",
"Delivery_Date": "01-01-2020",
"Line_Info": [
{
"Line_Id": 3,
"Line_Price": 50,
"Line_Units_Added": 5,
"Product_Info": {
"Product_Id": 500,
"Product_Name": "Spinach",
"Product_Description": "Vegetables",
"Number_in_Stock": 30,
"Product_Weight": 1.5,
"Product_Cost": 30,
"Product_in_Date": "01-01-2020",
"Product_Type": "Veg",
"Farmer_Info": {
"Farmer_Id": "420",
"Farmer_First_Name": "Olive",
"Farmer_Last_Name": "Lewine",
"Farmer_Address": "Sydney",
"Farmer_State": "Sydney",
"Farmer_Post_Code": "1200"
}
}
}
]
}
]
}]
想要使用mongo shell查找大于20的那些产品名称和产品成本。我做了如下：
db.sales.find( { "Order_Info.Line_Info.Product_Info.Product_Cost": { $gt: 20} }, {"_id": 0,
"Order_Info.Line_Info.Product_Info.Product_Name": 1,
"Order_Info.Line_Info.Product_Info.Product_Cost": 1} ).pretty();
但不幸的是，它仅返回第一个文档值。如何实现呢？
您可以通过聚合来实现
$map 有助于处理数组中的每个元素$filter 帮助使用条件和过滤器Mongo脚本
[
{
$project: {
Order_Info: {
$map: {
input: "$Order_Info",
in: {
$filter: {
input: "$$this.Line_Info",
cond: {
$gt: [
"$$this.Product_Info.Product_Cost",
30
]
}
}
}
}
}
}
}
]
工作蒙戈游乐场
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句