comment ne pas afficher les éléments avec des conditions spécifiques à mangouste

Question

Mon code est comme indiqué ci-dessous:

foodtruck.js

var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 
var Items = require('./items.js'); 


var FoodTruckSchema = new Schema({ 
    foodtruck_name:String, 
    foodtruck_location:String, 
    foodtruck_rating:{type:Number,default:5}, 
    foodtruck_total_votes:{type:Number,default:0}, 
    foodtruck_tag:String, 
    foodtruck_open_status:{type:Number,default:1}, //0 open 1 closed 
    foodtruck_starting_timing:String, 
    foodtruck_closing_timing:String, 
    foodtruck_cusine:[String], 
    foodtruck_img:String, 
    foodtruck_logo:String, 
    item_list: [ {type : mongoose.Schema.ObjectId, ref : 'items'}] 
},{ versionKey: false }); 



module.exports = mongoose.model('foodtruck',FoodTruckSchema); 

items.js

var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 

var ItemSchema = new Schema({ 
    no_of_times_ordered:Number, 
    item_name:String, 
    item_tag:String, 
    item_category:String, 
    item_description:String, 
    item_illustrations:[String], 
    item_stock:Number, //0 available 1 last 5 items 2 not available 
    item_quantity_ordered:{type:Number,default:0}, 
    item_discount_price:Number, 
    item_price:Number, 
    item_img:String, 
    no_of_likes:{type:Number,default:0} 
},{ versionKey: false }); 

module.exports = mongoose.model('items',ItemSchema); 

Ma requête est comme indiqué ci-dessous :

var foodtrucklist = function(req, res) { 
    foodtr.find().populate('item_list').exec(function(err, foodtrucks) { 
     foodtrucks.forEach(function(ftr) { 
      var start_time = ftr.foodtruck_starting_timing; 
      var end_time = ftr.foodtruck_closing_timing; 
      var foodtruck_open_status = ftr.foodtruck_open_status; 
      // var shut_down = ftr.foodtruck_shutdown; 
      if ((start_time && end_time) && 
       (start_time.trim() != '' && 
        end_time.trim() != '')) { 
       if (inTime(start_time, end_time) && 
        foodtruck_open_status ==0) { 
        ftr.foodtruck_open_status = 0; 
        ftr.save(); 
       } else { 
        ftr.foodtruck_open_status = 1; 
        ftr.save(); 
       } 
      } 
     }) 

     res.json({ 
      status: '200', 
      message: 'foodtrucklist', 
      data: foodtrucks 
     }); 
    }); 
}; 

maintenant à Je veux atteindre est, je ne veux pas montrer les éléments qui ont ** item_stock = -1 **. Comment puis-je atteindre dans la requête populate?

Answer 1

vous pouvez utiliser populate options à l'intérieur de votre populate (match pour la condition de requête).

Essayez ceci:

foodtr 
.find() 
.populate({ 
    path :'item_list', 
    match : { 
     item_stock : { $ne : -1} 
}). 
exec(function(err, foodtrucks) { 
    ... 
}); 

Pour plus d'informations sur les options POPULATE, lisez Mongoose populate query condtions and options documentation, recherchez condition de requête et les options